I have converted the amp to a Marshall tone stack and other suggestions you've made very successfully, but found nothing on tapping into the unused gain stage for the bass side. It utilizes a combination of top of the line Mustard style and Orange Drop Caps (oriented by ear) along with Carbon Comp RI in a simplified layout to improve the Tone of your amp across the entire spectrum. One of the many reference points for the tone was my own JTM 45/100® full stack. And the amp, when needing just a bit more gain, takes very kindly to overdrive and boost pedals for those searing leads.   This gives you the ability to remove the mids all together in the first part of the pot rotation then bring them in as you turn it up, nice touch. Re: Blackface Bassman Marshall Mods Mine is a late 1966 and is the ab165 circuit. 2012 Marshall Class 5 (Page 1) — Joe's Guitars, Amps and Gear — Joe Bonamassa Forum — The official forum for all things Joe Bonamassa, guitars and blues music. This amp uses similar tone stack as in Fender Blackface amps. And yes, it is. I began this as a response to a forum question and as I got going, decided I would do an all out review/guide to the amp since it was so long. Marshall even provides the holes in the PC board to mount it. Tone stacks rob gain, and lots of it. I found a mod online back then for giving it some overdrive, it helped a lot too. The tone stack has an extended range. 5) From V2B, the signal then leaves and enters the Tone Stack 6) The Tone Stack is where the Treble, Midrange and Bass knobs do their thing. Treble MEANS treble and bass means BASS. The Mod: This mod primarily involves reworking the tone stack and changing a few bypass capacitors. But is not Hiwatt>Marshall in many ways? I've never had the pleasure of owning one, but I still think they're as purdy as can be: Also a word on the Dumble OD. The mods include the following sections, of which any or all may be completed: 1. And have the tweedish setting as well. With this mod, these amps hang in there with modern German and American amps, without loosing its marshall pedigree. I'm still waiting for the new speaker, should be here Wednesday. Make your combo sound like an old California amp. '68 JMP50 SN S11093. Basically, you’re dealing with a real Marshall tone stack, and thus, you’d use the controls on the DLS as you would on an actual Marshall amp. 022uF, which is likely to be just a parts availability issue. If you do not see your amp listed please contact us!". MOD 101 DIY Guitar Amplifier Kit. Marshall Class 5 Mods. Leaving every knob in the middle position rarely yields a “neutral” frequency response, and changing the value of one component will usually alter the response of more than one frequency band. Just to level set things, I ll use the SVT II as my reference tone. The Treble cap is replaced with a high quality Silver Mica cap. Tone Stack Mod ----- Cathode By-Pass Mod ----- Presence Control Mod ----- The Stage II mods greatly smooth out the distortion while also giving the amp a decidedly Marshall flavor. The tone stack in a Marshall amp typicall follows the clipping stage whereas the tone stack in a Fender amp is usually before the clipping stage (obviously there are many other differences between the typical Marshall and Fender designs which create their sounds – but its outside the scope of this series). The Circuit Design is exactly the same as the Combo but the Internal layout is Different. The presence control lets you adjust presence from a brighter, louder aggressive tone to a more laid-back sound that's ideal for jazz or a warm, mellow tone. com 18 Watt LiteIIb "Baby Will" Parts List for Scratch Build The Baby Will is a PCB simplified version of the legendary Marshall 18 Watt 1974x circuit. amp's guitar speakers. The Marshall JVM410H is an amp that makes many promises and indeed actually does come up with some good stuff (at least where amps are concerned). Marshall Live 2020. Tone Stack patents. Faithful modeling of the classic tube architecture gives the Tone Master all the headroom, output, and reactivity of the original at a massive weight. 99 Trending at $41. First, we wanted the 'all knobs on 10' sound, which makes the tone stack virtually bypassed. 5F6A tone stack and Raw Control location. com Stay safe and healthy. Now with two 4x12 cabinets loaded with "greenback" Celestions, and a 100-watt head, the Marshall stack was born and ready to usher in the era of the Guitar God. I got the urge to put the old caps back in since I had the amp open and the tone became quite a bit brighter and harsher. The mod also slightly increased the gain of the amps. The second diagram shows the other way you can switch between two tone stacks, by adding components in parallel with the tone stack on the board. Though slightly higher priced than the Marshall kit, it does offer some premium features. It's a fact that Mesa Engineering uses two modified forms of the Marshall tone stack for their Dual Rectifier series. I recently found a demo with no mod description and it sounded very Marshall Plexi like on the lead channel. 022uf caps in the tone stack instead of the stock. - 56k/250pf - 47k/340pf - 33k/500pf tone stack switch (SDM's site) - 0. Basically, you’re dealing with a real Marshall tone stack, and thus, you’d use the controls on the DLS as you would on an actual Marshall amp. Tone Stack Mod. The tone stack was already there, just non-adjustable. 1nF parrallel to the 100k negative feedback resistor => F-3db = 1. At this point, I would NOT encourage anyone to download or use 2. Hylight 4- input, hardwired mains lead, chrome metal logo plate, Partridge transformers PT: TG6. So I took this one in a more Marshall Plexi direction. 047 µF capacitors. Things changed very quickly, however, as the tubes used in the old Bassman weren't readily available in the UK, so they switched to KT66. 022uf caps in the tone stack instead of the stock. If you’ve ever plugged into an AD30 or Rocker 32 Combo, you know we are capable of so much more. Just curious What is your favorite mod to do to that unused Normal channel on a Fender amp. 047uf values. One of the most popular, and most used by boutique amp companies, is the "TMB," where the Model 1974 tremolo channel is replaced with the full the preamp from a full size JTM/JMP Marshall with a tone stack. But this ton stack will give you a 7dB drop in volume without the LPB1 gain section so you'll only want to use it with an effect that has plenty of volume already. If you are looking for more of a Fender Tone stack, you can play with the R and C values, but you will have trouble changing the potentiometer values since they are soldered. You turn up any knob and you really hear the changes in tone. It adds a tone control, a switchable soft clipping stage, a compression switch, and a bass boost switch. Mod ® Kits are designed to give both novice and experienced musicians the opportunity to build their own amps and effects pedals. amp's guitar speakers. The mids are quite pronounced as well. Here are the values I used: C6 Silver Mica 250pF/500V C9 Mallory 150’s 100nf/600V C10 Mallory 150’s 47nf/600V. Remove the tone stack's ground and you completely bypass the tone stack. Marshall's generally do not feature great lush sounding MOD spring reverb. So, the end result gives the stock at a somewhat hot rodded JTM45 territory, the Bitmo mid boost adds to the other mods, to bring the tone into the Plexi area. 3-Way Negative Feedback Switch. Les Paul Lover Duke of Orange Posts: 6774 Joined: Tue Aug 18, 2009 9:08 am Location: Derby, England. Standby Switch Installation, 2. Another 6F4P Plexi video March 25, 2013 admin 0. Multi-platform Java version. Internal component view of the hand-wired tone stack of a Kendrick tube amplifier kit. Marshall JVM410H Guitar Tube Amp Review. Official Tone Junkie Store 57 5e3 Deluxe! Seeking to capture the iconic tone of an original 1957 Fender 5e3 Tweed Deluxe amplifier, the 57 5e3 Deluxe Kemper Profile Pack beautifully captures this late 50’s tweed circuit that can reach from beautiful Fender cleans to “the best kept secret in rock music”. Comes with the head and 1976 Kustom Cab with alnico. The Big Muff has a little more complicated tone stack, with both a high-pass and a low-pass filter. Take a Les Paul with a Gibson T-Top (or custom-made replica) in the bridge and PAF replica in the neck, flip your pickup selector switch to the middle, string up with Ernie Ball Super Slinky strings (those are 8s, use 9s at the most), plug into a plexi-ish amp with those settings running into a Marshall cab with Celestion Greenbacks, and you should be well on your way to getting a Page woody!. Here is a list of the mod steps. - Modified Tone Stack - Allows each Frequency (Treble, Middle and Bass) to sweep from 'Zero-to-Max'. The guitar sound is then routed thru a Baxandall Tone Stack. The Bassman has significantly influenced the whole guitar amp industry since it was introduced. Jim Marshall, owner of J&T Marshall Musical Instruments, LTD, a music shop in Uxbridge Road, Hanwell, West London, and whose engineers, Ken Bran and Dudley Craven, had begun building amplifiers for sale in their shop in September 1962, notably the infamous. I'm probably going to turn that cold clipper preamp stage into a cathode follower and the tone stack into a James with mid shift. Behind the mic stand, you can see the panel of the 3rd head. All you need to provide are hand tools, a soldering iron and solder. The Equinox Overdrive project is a clone of the Marshall Guv'nor / Drivemaster. LONDON POWER Kevin O’Connor builds a full line of innovative amplifiers; he also writes the most authoritative books on the subject. Take a Les Paul with a Gibson T-Top (or custom-made replica) in the bridge and PAF replica in the neck, flip your pickup selector switch to the middle, string up with Ernie Ball Super Slinky strings (those are 8s, use 9s at the most), plug into a plexi-ish amp with those settings running into a Marshall cab with Celestion Greenbacks, and you should be well on your way to getting a Page woody!. A quick and easy way to try the Tone Stack Lift circuit! What you are looking at is the back of the Middle pot on a Metroamp 69 plexi kit. What it does have is every combination of 100 watt JMP variation from the Plexi to the mid seventies Super Lead and Super Bass heads. The Traynor only have a single tone control. The Marshall JMP50 Model 1987 tone stack lowers the value of R 1 by 41 percent, from 56k to 33k. I do that on harp amps along with the. Carter and features exclusive interviews with the greatest names in music. A Useful Mod' for DC-coupled cthode followers: It is very common to see a DC coupled cathode follower in a guitar amp, often before a tone stack. Modification price: 199,00 €. Bass channel has a Marshall tone stack and extra gain stage controlled with a master volume. It will turn your amp in to the more Ampeg VL/Metaltronix kind of range. Re: Traynor YGM Tone Stack « Reply #10 on: November 19, 2015, 01:49:14 AM » That video was made with the volume at about 5 with an attenuator on very low (or high). Jim Marshall, owner of J&T Marshall Musical Instruments, LTD, a music shop in Uxbridge Road, Hanwell, West London, and whose engineers, Ken Bran and Dudley Craven, had begun building amplifiers for sale in their shop in September 1962, notably the infamous. Re: Tube upgrade for Marshall dsl40c Originally Posted by Derpottsie Im playing most of the time in the 10:00 position on full power mode in lead 2 with the gain at about 9:00 and a tube screamer just barely dialed in at maybe 2 or 3. Again, the untrained eye can see the difference between the two. Tone stack mod I modded the tone stack on mine to resemble marshall's design. This is a fun little amp to modify and a great place to start if you’ve never done anything like this. • The Hard Clipping mod is taken from the King of Tone and allows you to add hard clipping after the standard diode clipping section. '68 JMP50 SN S11093. This is my favorite and most useful amp mod, a three-way SPDT ON/OFF/ON mini-switch gives you: Normal feedback / No Feedback / Heavy feedback. Contact me for a quote. This channel produces pure Marshall crunch in spades, and what’s really amazing is that it can do it at any volume. This is great for learning new songs or just playing along with your favorite music. It doesn't look like a Marshall tone stack. I went through mine and tightened things up, nos tubes and use it into a 1958 Hammond mahogany 1-12 cab (partial open) with a MojoTone British speaker that Im pretty content with. The JTM-1H employs two 12AX7 and one 12AU7 tubes in a Class A/B configuration, and Marshall says that the amp is "based on the JTM45 tone stack, as if the inputs had been jumped," which sounds about right, though with more gain on tap as mentioned previously. Just to level set things, I ll use the SVT II as my reference tone. II sounds wonderful, versatility enhanced. But the DLS' true Marshall tone stack is what made it my first choice - for my practice rig, I can tweak tones easily with real analog knobs as if it were an amp, and not have to fiddle much with virtual controls inside Bias. There is a volume increase when the mid pot is turned up. The amplifier is based around the MG15CDR and features two channels, spring reverb and Marshall’s proprietary FDD (frequency dependant damping) technology. Note that this mod package is for the C1 model of AC4. The circuit laid out on a circuit board is known as the LiteIIb. If you look closely you'll see there isn't much difference between the Marshall circuit and the Nomad Ch3 circuit. The Hartke Tone Stack controls are also labelled Bass and Treble, but the enhanced. Contact Me. The Official Blackstar Amplification site, featuring Guitar Amplifiers, Guitar Amps, Effects Pedals, Merchandise, Dealers, Videos, Artist News. Hylight 4- input 1. Marshall Mods Page. These changes made the Lead amps a lot more midrangy and biting. My version has a lower voltage and sounds darker but I do have an old 275v transformer so I must try it. I can assure you that an EL-34 powered, plexi-modded bassman head through the right speakers can do a very convincing Marshall impersonation. They’re the Filet Mignon of the amp world. 18watt Technical Discussion. You may want to change the slope resistor to 56k and remove the. This is the standard Fender/Vox/Marshall tone stack. You will be shocked at the incrdebile sounds available from this little amp with the Stage. Things changed very quickly, however, as the tubes used in the old Bassman weren't readily available in the UK, so they switched to KT66. Gets rid of the shrill, lackluster tone and makes the amp sound more like the vintage AC4. Tone Stack, the type of tone stack used on this amp is the typical modified Baxandall style stack Carvin uses in all of it’s modern tube amps. Modification price: 199,00 €. This Mod is really more of an upgrade. I added a regular tone stack. Tone Stack - Replace the awful Bass and Mid caps with high quality WIMA caps. From the moment you plug in, the DSL provides you with the functionality you need to take your sound from rehearsal to the studio with confidence. The presence control lets you adjust presence from a brighter, louder aggressive tone to a more laid-back sound that's ideal for jazz or a warm, mellow tone. Of course, the tone stack is in a completely different place than in a Dumble, but the tone stack works well for me. Ok maybe not a Marshall mod but a Hiwatt. In this video I'll show you how to modify a bone stock 1960s Fender Bassman AC568 or AB165 into a MONSTER amplifier using my "*AB*Normal Channel Mods. Tone stack types: Fender modern, Vox, Marshall, James (passive predecessor to Baxandall), Fender E series, Steve Bench, Hiwatt tone stack, and now the Big Muff tone stack used in FX units. Class A; Push Pull 6V6 - enriched fixed bias; Single channel: Treble, Mid, Bass. Even Marshall makes a 1-watt head now. 99 eBay determines this price through a machine learned model of the product's sale prices within the last 90 days. 1 uF bass cap with a. Amp Guys have a number of 'vintage friendly' mods and overhauls that we can adapt to your stock Marshall, Fender or other style amplifier. EVH 5153 100W Blue Channel 14. I do that on harp amps along with the. 022 µF/600V caps. Hylight 4- input 1. Magazine Reviews. 1uF tone cap, and a new 0. The capacitor value is wide open for experimentation. - Modified Tone Stack - Allows each Frequency (Treble, Middle and Bass) to sweep from 'Zero-to-Max'. ) 33k/500pF tone stack combo instead of a 33k/556pF tone stack combo 3. In essence, Pete merged the Fender tone stack with a Hiwatt power amp, but with some modifications to make it work better in this rig and with the closed back speaker cabinets being used. This mod is supposed to give Fenders' a warmer tone with Marshall flavoring. Loosely based on the JCM 800. - It has a 220pF cap across each 470pF treble cap in each tone stack (as with the Plexi Channel mods). 2 released - includes the Big Muff tone stack. At noon it is at 700Hz and when you dial it down it moves towards 850Hz. This pedal sounds great with a bass stock, but I did slightly mod it for a little more low end. The unit comes with two speaker cabinets to make up the stack. 18uf preamp coupling caps - higher value capacitors for mains, screen, PI, preamp filtering - lower value capacitor for the V1 bypass cap. 36watt TMB () () - Older original 36watt TMB r5 () () - Richie's latest design 18watt TRex - This is Lite II plus an overdrive TMB channel. In my book, the Lee Jackson mod wins. Unnervingly, if you see it enough it even begins to make sense. So, I'm looking at the tone stack for my vintage Traynor here: 51257 This seems very similar to the classic Fender/marshall tone stack: 51258 With the treble cap being 330 (with a 1M pot), the bass cap being. 022 mid cap with a. The change from the stock 4'x8' speakers to an old Celestion 12', that coupled with the capacitor mods are dramatic. The mods shown on the internet are for guitar and, maybe more specifically, rock guitar. I wanted to be able to take the sound of this stack with me to gigs easily, but not risk harming the amp. Each one has. Cerulean Overdrive Marshall Bluesbreaker Overview the tone stack and provides a different effect than just turning down the tone control. It depends on how the master volume is implemented. In fact, it is often referred to as the FMV (Fender Marshall Vox) tone stack circuit. Marshall 9200 2X100W Schematic. 14-WATT GUITAR AMPLIFIER with Baxandall Tone Stack "KIT ONLY" - $23. The following Marshall Super Lead tone tips and tricks will enable you to get much more versatility out of this legendary amplifier. The back panel includes 4,8 and 16 ohm outputs, the half power switch and the EQ bypass footswitch jack.   This gives you the ability to remove the mids all together in the first part of the pot rotation then bring them in as you turn it up, nice touch. Instructions to perform the mods are included. Mod ® Kits are designed to give both novice and experienced musicians the opportunity to build their own amps and effects pedals. There’s a bit more treble and bass on tap, and the midrange control is powerful enough to overdrive some otherwise clean settings when maxed out. Removing this bright cap is a common mod for 2204 and JCM800 amps to cut ice pick highs and reduce shrillness. Cheers, Tim C. It is brighter and harsher sounding and the overdrive is not the same. Steps 1, 2, and 3 raise the preamp stage gain and apply a Marshall-style voicing to the preamp. Gets rid of the shrill, lackluster tone and makes the amp sound more like the vintage AC4. The Marshall DSL15C-KIT-1 1×12 Guitar Amp Combo Kit is much more than a kit to help you build your own guitar amp if you're an amateur. This mod works better with the PPI2 Master Volume Mod installed so you can control the volumes better and maximize gain potential. [It's often a good idea to add a large capacitor before the tone stack to block any DC that might get around your bypass. 1987x Series Lead Circuit JMP 50I build these for fun and need to fund some other projects so letting this one go. More on that below. Re: Favorite mods to the Fender Normal channel??? « Reply #22 on: April 04, 2010, 03:02:39 am » Since there is no mid control I would take out one of the inputs and add a 25KL pot instead of the 6. One is a straight power amp while the other adds a tone control and volume control circuit to the input. Fender Tweed Deluxe (5E3) Low-Pass Mod: Cayocosta. Tone Stack - I left the tone stack alone as this is the basic Marshall Tone stack and is a good fit for this amp. ; TRex MOSFET Switch - specific implementation. But the DLS' true Marshall tone stack is what made it my first choice - for my practice rig, I can tweak tones easily with real analog knobs as if it were an amp, and not have to fiddle much with virtual controls inside Bias. This amp is the solution for minimalists who desire the classic Marshall vintage tone without the price and inflexibility of owning a loud and heavy Marshall Plexi half stack. As for the difference between the 60s/70s models and the JCM800s, all I can tell you is that the circuit was not modified from the time the Super Bass was introduced (I believe in 1967 or 68) until the JCM800s were introduced. Mullard's tone control setup is optimized for hifi use so using something like a Fender tone stack woudld work better for guitar. I had a blackface Super recently with too much bass and lower mids I replaced the. Third, the rest of the preamp (and power amp and power supply) plays a big roll in setting the voice of the amp. When James Marshall Hendrix landed in England, he thought it was fate having the same name as Marshall's owner, and left the store with a brand new 100. The next consideration is the tone stack. I first did this to compensate for the JVM having lower value treble and mid pots than a traditional Marshall, which shaves off a little more upper mids and I thought it was a little known way of addressing this (Santiago, have you been. A quick and easy way to try the Tone Stack Lift circuit! What you are looking at is the back of the Middle pot on a Metroamp 69 plexi kit. [It's often a good idea to add a large capacitor before the tone stack to block any DC that might get around your bypass. Essentially, the Dirty Little Secret was designed to accurately reproduce the same characteristics of the passive tone stacks found in Super Lead and Super Bass amps. 022uF, which is likely to be just a parts availability issue. The origins of the Super Champs tone-stack go back to Fenders four knob tone-stack control, first used in the 5F6 Bassman, becoming three knob TMB with a separated presence in the classic 5F6A. And have the tweedish setting as well. The Marshall Limited Edition Randy Rhoads Tribute Full Stack includes an all-tube 100W Super Lead head modified to the exact specifications of Rhoads' original amp. The Germanium Super Phat Mod – Hand Built Edition not only has the perfect JFETS for tone, it has the attention to detail only a hand built product can provide. Multi-platform Java version. Tone stack on this amp really eats gain and volume. Marshall also raises the values of C 2 and C 3 by 10 percent, from 0. The 'No Feedback' position makes the amp break up early kind of like a 5E3 Deluxe. DIY Layout Creator 2. On our first disc, we were a little unhappy with the guitar tones we got, so over the past year we’ve expanded our amp collection and knowledge. A relatively hard to find 30 watt combo and rarely discussed. There's still plenty of adjustment in the tone controls. Modifications are most common on tube amplifiers. The tubes are very close to the speaker. I agree more with the later. Compare that to a Blackface Fender preamp: This is an AA165 Blackface Bassman and technically it uses 2 and a half tubes for the preamp, but if we were to make this a one-channel jobber we'd only need one and a half preamp tubes. 1959 Super Lead 100 Watt and 1987 Lead 50 Watt "Plexi" Preamp. The Official Blackstar Amplification site, featuring Guitar Amplifiers, Guitar Amps, Effects Pedals, Merchandise, Dealers, Videos, Artist News. Leaving every knob in the middle position rarely yields a “neutral” frequency response, and changing the value of one component will usually alter the response of more than one frequency band. SHVPES and Demob Happy join the. Tone Stack - I left the tone stack alone as this is the basic Marshall Tone stack and is a good fit for this amp. A Bridged-Tee Tone Control for Effects Pedals. The Friedman amps are 3/4 tube gain stages depending on mode and all the 100w are pretty much variations on the same basic circuit. The mod also slightly increased the gain of the amps. It can be downloaded here. For a lower-cost option, I’d go with the BOSS Power Stack. THE 18 WATT COMMUNITY CENTER Thriving online DIY community devoted to the Marshall 18-watt amplifier. Basically, you’re dealing with a real Marshall tone stack, and thus, you’d use the controls on the DLS as you would on an actual Marshall amp. This is perfect for beefing up a Strat or pushing an amp hard so that you get more natural tube amp distortion. Both are 2 cascading triodes, followed by a cathode follower, into a FMV tone stack (TMB instead of Vox's TB), into a LTP phase. The circuit we laid out on a circuit board is known as the LiteIIb. NOE parts main switch and indicator. Take a Les Paul with a Gibson T-Top (or custom-made replica) in the bridge and PAF replica in the neck, flip your pickup selector switch to the middle, string up with Ernie Ball Super Slinky strings (those are 8s, use 9s at the most), plug into a plexi-ish amp with those settings running into a Marshall cab with Celestion Greenbacks, and you should be well on your way to getting a Page woody!. LONDON POWER Kevin O’Connor builds a full line of innovative amplifiers; he also writes the most authoritative books on the subject. to get the tone to match. 1987x Series Lead Circuit JMP 50I build these for fun and need to fund some other projects so letting this one go. It also has a different power supply and a few changes in the power section. Mostly the TBM Marshall or Fender type tone stacks have a mid scoop that lends itself very nicely to guitars with magnetic pickups. Specification The original pedal was a great design that features tube-like amp stages, tube amp tone stacks, and a variety of tone shaping circuits that bring out the best in any. Pre-slice and dice: Extra vol control installed after tone stack. The mods include the following sections, of which any or all may be completed: 1. Jim Marshall, owner of J&T Marshall Musical Instruments, LTD, a music shop in Uxbridge Road, Hanwell, West London, and whose engineers, Ken Bran and Dudley Craven, had begun building amplifiers for sale in their shop in September 1962, notably the infamous. With an onboard vintage tone stack to die for, you now have ULTIMATE control over ANY guitar / amp / effects combination. Way too much gain, too little decoupling, lousy tone stack. There are a couple of patents/applications regarding digital simulation of the tone stack. Even Marshall makes a 1-watt head now. This is a fun little amp to modify and a great place to start if you've never done anything like this. Note other hi gh quality caps rather than WIMAs can be used but the values are important. The Mod: This mod primarily involves reworking the tone stack and changing a few bypass capacitors. With this mod, these amps hang in there with modern German and American amps, without loosing its marshall pedigree. NOE parts main switch and indicator. Voodoo Amplification, Inc. Marshall Bass 600W 3560 Schematic. 68uF bypass cap on V2 to drop the gain down a little if it's too much. The Marshall Limited Edition Randy Rhoads Tribute Full Stack includes an all-tube 100W Super Lead head modified to the exact specifications of Rhoads' original amp. It's an overdrive with a 3-band tonestack, and it was among the first overdrive pedals to use this type of tone control, allowing for more amp-like toneshaping via bass, midrange and treble knobs. 18watt Technical Discussion. On the Marshall 1959 Super Lead schematic, the signal leaves the tone stack and enters the phase inverter at point A. DOWN you have the Ultra mode. It is brighter and harsher sounding and the overdrive is not the same. Perhaps some of you know a mod that could keep the basic Traynor circuit, but mod it for a Marshall 18/20 watt-like tone? Let me know what you all think. And have the tweedish setting as well. Way too much gain, too little decoupling, lousy tone stack. Reverb approx. I've left the normal channel mostly stock and really want more gain on the modded side. To test the mod before taking all of the parts out, you can unsolder one leg of R19. Make your combo sound like an old California amp. The preamp is currently fairly awful. SHVPES and Demob Happy join the. Here's how it looks: The tone stack. Gerald Weber also says he's seen a lot of amps this way, but he personally prefers the. Dear Amp Man, I am unable to find anything on cascading the half-unused tube in an AA371 Bassman. There is an 18 watt "lite" circuit that has tremolo with only one input and sole tone control. More on that below. Third, the rest of the preamp (and power amp and power supply) plays a big roll in setting the voice of the amp. 80’s tone mod I offer an 80’s type tone mod for the Haze to give it a little more gain, stronger midrange, and tighter bottom end. If playback doesn't begin shortly,. The three knob tone stack has been around since the beginning of bass amplifiers. The listing includes Vai’s 100-watt, four-input Marshall JMP Plexi head and matching "white face" 4×12 cabinets. A typical plexi circuit looks a lot more like a vox circuit (top boost). Simply click on the appropriate tab to bring up a different schematic. This enhances the action of the bass, middle and treble controls, increasing the dynamics of the amplifier. Perhaps some of you know a mod that could keep the basic Traynor circuit, but mod it for a Marshall 18/20 watt-like tone? Let me know what you all think. That's the way to get full tone control. We will discuss Tone Stacks later. I added a regular tone stack. Each one has. 68/50V polyester. It can be used for a very subtle treble cut, or a ‘Deep Rhythm’ tone, as was emphasized on the Telecaster guitar tone controls (another example of a crude treble cut). On our first disc, we were a little unhappy with the guitar tones we got, so over the past year we’ve expanded our amp collection and knowledge. On the Marshall 1959 Super Lead schematic, the signal leaves the tone stack and enters the phase inverter at point A. Built using the best hand picked electronics sozo capacitors for the tone stack. The Equinox Overdrive project is a clone of the Marshall Guv'nor / Drivemaster. The traditional arrangement suffers from the problem that on start up, the grid will immediately rise to HT potential while the cathode is still cold, at ground potential. The Traynor only have a single tone control. As with the Combo it is an All Valve, Class A, Cathode Bias, Single Ended Design with NO Transistors, Chips, Digital Processing or SMT (Surface Mount Technology). Note: The first four mods listed above (Clipping diode removeal, Tone stack, Cathode By-pass and Presence Control mods) I now refer to as the Stage I mods, in order to differentiate them from the new set of mods that I call the Stage II mods. I will comment on what each step of the mod does: 1) Change R2 to 2. 3-Way Negative Feedback Switch. Tags: marshall; steve vai. I wanted to be able to take the sound of this stack with me to gigs easily, but not risk harming the amp. i found that the first one sounded Fenderish an the second almost like a real Marshall. Tone Stack patents. This is one of my favorite amps and was one of the reasons I bought my Kemper in the first place. A relatively hard to find 30 watt combo and rarely discussed. So, I'm looking at the tone stack for my vintage Traynor here: 51257 This seems very similar to the classic Fender/marshall tone stack: 51258 With the treble cap being 330 (with a 1M pot), the bass cap being. 1 uf cap put around the "top" of the EQ (from the input of the EQ to the output leaving the 250K Treble control) will do the trick. MOD 101 Guitar Amp Kit Features: All Tube Design (solid-state diodes used only for full-wave rectification) 60W output power into 4, 8, 16 and 20 Ω 1 channel with customizable: tone stack, power tubes, negative feedback, input miller capacitance volt divider/LP filter, and preamp cathode bypass cap (all parts included) Vintage channel controls: bass, treble and volume Vintage. Z Amps, the Mod RA process was worth the total completion interval. The kit uses a 12AX7 preamplifier tube, and a single EL84 output tube with solid state diodes for power rectification. I'm telling you it's a totally different amp. Common plexi mods? Discussion in 'Shock Brother 's DIY Amps' started The cathode follower is probably the best way IMO to drive a full tone stack, even gain aside. The Tone Cap is an incredibly useful tone-shaping tool. 14-Watt Guitar Amplifier with Baxandall Tone Stack Kit (#5887) This kit is a very clean-sounding 14-watt Guitar Amplifier. Now with two 4x12 cabinets loaded with "greenback" Celestions, and a 100-watt head, the Marshall stack was born and ready to usher in the era of the Guitar God. Add a 5uF cap across the second stage 10K resistor. There are a ton of variations of this simple component – from the super basic models to more boutique “oil and paper” versions – but which one to choose?. Especially since I've gone back. The only other difference is the slope resistor on the input. 022 µF/600V caps. Hylight 4- input, hardwired mains lead, chrome metal logo plate, Partridge transformers PT: TG6. Step 3, replacing the ubiquitous. The speaker in the pics is an old, tired, fender speaker - doesn't sound good in this amp. If you look closely you'll see there isn't much difference between the Marshall circuit and the Nomad Ch3 circuit. In fact, it's actually the same as the classic *Marshall* tone stack. The marshall amps has a lot of mids and when you try to dial out the mids the center frequency is too high. The second diagram shows the other way you can switch between two tone stacks, by adding components in parallel with the tone stack on the board. For this to work, you must be using 56k/250pf as the tone stack on the board, and use 82k and 250pf for the parts mounted on the switch. Apparently, they modified the tone stack pretty significantly, and the controls are different. Measurement details: Fender Mustang II v2 amp models measured at minimal / very low gain setting to achieve least distortion of the measurement signal, any noise on some of the curves should be ignored. There's still plenty of adjustment in the tone controls. I agree more with the later. I just used a standard Marshall tone stack whereas the JMP-1 uses a standard Marshall tone stack but the pots are replaced with fixed resistors but those values don't necessarily correspond to the pots at noon. The kit uses a 12AX7 preamplifier tube, and a single EL84 output tube with solid state diodes for power rectification. Marshall Artiste 50W 2040 Schematic. The "Tweed Mod" leaves out the key to the Fender tweed sound-the tone stack driven by a cathode follower. Crank the gain on this beefed-up tribute to Randy Rhoads. 2 250pF caps in parallel effectively make a 500pF cap. 2K 680 to 1k 1. Here's how it looks: The tone stack. Bias Control Installation, 7. With an onboard vintage tone stack to die for, you now have ULTIMATE control over ANY guitar / amp / effects combination. [It's often a good idea to add a large capacitor before the tone stack to block any DC that might get around your bypass. Marshall Live 2020. A standard Fender tone stack uses 0. Les Paul Lover Duke of Orange Posts: 6774 Joined: Tue Aug 18, 2009 9:08 am Location: Derby, England. One of the things I wanted was to convert the normal channel into a gainier tone a la Marshall brown sound and be able to jump it with the verb/vibrato channel so I can blend the two. There isn't much treble being used, increase that to, in effect, reduce the bass. I found a mod online back then for giving it some overdrive, it helped a lot too. The further away from ground you lift the tone stack, the more mids, but the less effective the controls are. 14-Watt Guitar Amplifier with Baxandall Tone Stack Kit (#5887) This kit is a very clean-sounding 14-watt Guitar Amplifier. Well done Dr. Modern Rock/Metal I offer a Modern Rock/Metal for Haze to give it even more gain a a modern rock/metal type tone and tight bottom. There is an 18 watt "lite" circuit that has tremolo with only one input and sole tone control. 00 H H Input 0 1 2 3 4 5 6 7 8 9 10 Gain 0 1 2 3 4 5 6 7 8 9 10. There are a couple of patents/applications regarding digital simulation of the tone stack. Big Muff Tone Control Circuit 'Fake' Variable Capacitors Marshall Gov'nor Tone Stack Mid Scoop Tone Control 2x Pot Tone. The following Marshall Super Lead tone tips and tricks will enable you to get much more versatility out of this legendary amplifier. The problem here is it is tuned for pretty strong mid range. The amp will at a given volume knob setting be louder with more mids and distortion. At the least, replace the. A 1meg linear pot has been added temporarily to dial out the tone stack. They had me mod them and sold them as an alternative to the stock version being sold at GC's. The tone stack has an extended range. Old nasty. Z Amps, the Mod RA process was worth the total completion interval. 68uF cathode bypass cap on the first gain stage with a 5uF cap. Plug the Super 6 in to a ANY clean amp to nail that mid-60's American amp tone. Carter and features exclusive interviews with the greatest names in music. The output of the circuit is then the Tone 2 lug of the pot so you can also omit the Tone 2 wire connection to the board. I'll probably use the worthless "texture" control for the FAC. - 56k/250pf - 47k/340pf - 33k/500pf tone stack switch (SDM's site) - 0. I'm still waiting for the new speaker, should be here Wednesday. Take a Les Paul with a Gibson T-Top (or custom-made replica) in the bridge and PAF replica in the neck, flip your pickup selector switch to the middle, string up with Ernie Ball Super Slinky strings (those are 8s, use 9s at the most), plug into a plexi-ish amp with those settings running into a Marshall cab with Celestion Greenbacks, and you should be well on your way to getting a Page woody!. The tone stack was already there, just non-adjustable. That explains why I like the "Visual Sound Jekyll & Hyde" (Jekyll side is basically Marshall Shredmaster) to be set to "sharp" instead of "blunt". A relatively hard to find 30 watt combo and rarely discussed. If you look closely you'll see there isn't much difference between the Marshall circuit and the Nomad Ch3 circuit. The preamp is currently fairly awful. With this mod, these amps hang in there with modern German and American amps, without loosing its marshall pedigree. I added a regular tone stack. Now whether or not it was designed that way I don't know. Mesa Boogie 2-channel Dual Rectifier 20. A quick and easy way to try the Tone Stack Lift circuit! What you are looking at is the back of the Middle pot on a Metroamp 69 plexi kit. The Hartke Tone Stack controls are also labelled Bass and Treble, but the enhanced. "We have designed countless Mods since 1998. I used Mallory 150’s and silver mica caps and 1W carbon film resistors. One of the most popular, and most used by boutique amp companies, is the "TMB," where the Model 1974 tremolo channel is replaced with the full the preamp from a full size JTM/JMP Marshall with a tone stack. In this video I'll show you how to modify a bone stock 1960s Fender Bassman AC568 or AB165 into a MONSTER amplifier using my "*AB*Normal Channel Mods. It’s also easier to tailor to high gain dirty amps and clean tone amps by varying the TBM tone stacks. If playback doesn't begin shortly,. This circuit to the left was featured in several Gibson amps of years past and produces a notch or band-reject in the frequency spectrum (around 450Hz). The Official Blackstar Amplification site, featuring Guitar Amplifiers, Guitar Amps, Effects Pedals, Merchandise, Dealers, Videos, Artist News. And have the tweedish setting as well. Power Supply Stiffening, 5. 68uF cathode bypass cap on the first gain stage with a 5uF cap. The bass is tighter, the cleans are warmer, the lead channels are more focused and tight, the crunch channel is less floppy, the gain is quieter and the thing sustains forever in any channel. The modification is achieved by replacing capacitor and resistor values in the original tone stack. 99 Trending at $41. If we had infinite supply voltage and valves that didn't arc then the original cascaded gain to the start of the tone stack was around a factor of 12. Simply click on the appropriate tab to bring up a different schematic. Welcome, Guest i made first the Layout posted here without mods. Change the voltage divider to a 1 meg and 220K. Marshall Mods by Voodoo Amps. Although it sounds not too bad after the mods, it will get less…. In this video I'll show you how to modify a bone stock 1960s Fender Bassman AC568 or AB165 into a MONSTER amplifier using my "*AB*Normal Channel Mods. It doesn't look like a Marshall tone stack. If you’ve ever plugged into an AD30 or Rocker 32 Combo, you know we are capable of so much more. Behind the mic stand, you can see the panel of the 3rd head. The amplifier is rated to deliver 5 watts into an 8-ohm load. Tone Stack Mod. LONDON POWER Kevin O’Connor builds a full line of innovative amplifiers; he also writes the most authoritative books on the subject. Bass channel has a Marshall tone stack and extra gain stage controlled with a master volume. Volume, Gain and Tone knobs let you customize your tone for blues to heavy rock!. Just to level set things, I ll use the SVT II as my reference tone. Friedman Smallbox 13. For a lower-cost option, I’d go with the BOSS Power Stack. And amplifier 'mod merchants' lure us over to their benches with Svengali promises of sounding like the latest guitar hero. Ken Fischer says that the. There are many mods you can find for this and here are some of my favourite. The early 2205s basically have the tone stack in a weird place and so you have to dime the boost volume right off the bat and then use the master channel volume to adjust. Tone Stack - I left the tone stack alone as this is the basic Marshall Tone stack and is a good fit for this amp. Most postings, books, and amp tone videos dwell on amp brands and mods and swapping tube types and swapping speakers or pickups, but such priorities are backwards. On the turret board you can clearly see a 39kOhm slope resistor in the tone-stack, usually a 56kOhm resistor was used. The anode and cathode resistors were removed in the second series. GuitarAmplifierPCBs. Modern Rock/Metal I offer a Modern Rock/Metal for Haze to give it even more gain a a modern rock/metal type tone and tight bottom. Fender Fat Strat with DiMarzio tone zone in the bridge. 022 mid cap with a. The back panel includes 4,8 and 16 ohm outputs, the half power switch and the EQ bypass footswitch jack. Looks like it has only 2 inputs. This enhances the action of the bass, middle and treble controls, increasing the dynamics of the amplifier. V2 Amplification, Vancouver, British Columbia. 68uF cathode bypass cap on the first gain stage with a 5uF cap. Guitar Valve Amplifier Mods and Modification - Power Scaling - Effects Pedals, and Carbon Fibre Guitars. Dear Amp Man, I am unable to find anything on cascading the half-unused tube in an AA371 Bassman. Both are 2 cascading triodes, followed by a cathode follower, into a FMV tone stack (TMB instead of Vox's TB), into a LTP phase. Jimi used 1966 Marshall Super 100 amps, and had the tone stack of the amps slightly modified to provide a treble boost and a bit more bass. The three knob tone stack has been around since the beginning of bass amplifiers. Mullard's tone control setup is optimized for hifi use so using something like a Fender tone stack woudld work better for guitar. However, the extra bass this mod provides reduces overall clean volume of the amp a little. This is one of my favorite amps and was one of the reasons I bought my Kemper in the first place. Official Tone Junkie Store 57 5e3 Deluxe! Seeking to capture the iconic tone of an original 1957 Fender 5e3 Tweed Deluxe amplifier, the 57 5e3 Deluxe Kemper Profile Pack beautifully captures this late 50’s tweed circuit that can reach from beautiful Fender cleans to “the best kept secret in rock music”. I remember when I got my first one. The Marshall JMP50 Model 1987 tone stack lowers the value of R 1 by 41 percent, from 56k to 33k. It seems the designers were trying to compensate for the early tone stack placement by adding a final gain stage after a tone recovery stage, but, as you point out, putting the 470k/470pf network (you use 500pf in the MODS schematic) so late in the amp will not really duplicate the raspy sound of the 2204, which puts. MOD 101 Guitar Amp Kit Features: All Tube Design (solid-state diodes used only for full-wave rectification) 60W output power into 4, 8, 16 and 20 Ω 1 channel with customizable: tone stack, power tubes, negative feedback, input miller capacitance volt divider/LP filter, and preamp cathode bypass cap (all parts included) Vintage channel controls: bass, treble and volume Vintage. I added a regular tone stack. The Plexi's topology is still very similar to the Fender 5F6-A Bassman. 047 µF capacitors. The mod also slightly increased the gain of the amps. The earliest JTM45's, i. The overdrive from the Normal channel is predictable from other blackface Fenders that I own. This mod is for those who want more distortion and a fatter, more Tweed'ish tone in stead on the default scooped Blackface tone. This is a convenient spot to install a pre-phase inverter master volume, because it is easy to lift the wire coming off the wiper of the treble pot and insert a 1Meg pot. 046 and it fixed the problem perfectly. Here’s how it looks: The tone stack. 7 Powdog 4 years ago Not sure why Marshall doesn't stray from convention and make a 1974x with a tone stack. However, the extra bass this mod provides reduces overall clean volume of the amp a little. Third, the rest of the preamp (and power amp and power supply) plays a big roll in setting the voice of the amp. Of course there are accepted mods I sometimes make these amplifiers into the typical 'classic' circuit seen in 'Tweed' Bassman and Marshall amplifiers. So I took this one in a more Marshall Plexi direction. However, because the bass response in this pedal is so robust, you can easily balance the extra treble after removing the cap. and comparing with the moded tone stack with the marshall specs. Marshall Class 5 Head C5H - Made in the UK - I am no longer modifying these Amps - The Following is for Information Only. So the recent Fender Custom Deluxe '68 Silver Face amps advertise that the "Custom" channel on the left has a "Bassman tone stack. As with the Combo it is an All Valve, Class A, Cathode Bias, Single Ended Design. If you want a plexi tone then youd want a different gain structure and a more sophisticated tone stack (known as a FMV or fender marshall vox). The origins of the Super Champs tone-stack go back to Fenders four knob tone-stack control, first used in the 5F6 Bassman, becoming three knob TMB with a separated presence in the classic 5F6A. Step 3, replacing the ubiquitous. 1nF parrallel to the 100k negative feedback resistor => F-3db = 1. In general, the modifications I describe in How to Hot Rod Your Fender Amp can be adapted to other major brands of tube amps besides Fender, such as Marshall, Gibson, Vox, Ampeg, and Peavey. the second one a cathode follower (to feed the tone stack) and the PI. These pages contain detailed directions to make the unused triode section in a Blues Jr. This circuit to the left was featured in several Gibson amps of years past and produces a notch or band-reject in the frequency spectrum (around 450Hz). This download is the complete documentation of the famous Bill M. As expected, the brightness increase heard when flipping the toggle on is more pronounced, but not excessively so, in my opinion. All kits come with easy to follow instructions and use point to point wiring. - Custom Builds. I took a look at the 2203 schematic - and the value there (coming off the 12ax7 to ground ahead of the tone stack) is 100k. I have the tone stack narrowed down to what I want to hear from it. This is what I consider somewhat of a guide to the Marshall Class 5. DIY: Hot-Rodding The New Fender Champion 600! by John R. Engaging the tone stack cut some of the lows, reduces volume overall, and allows for a brighter tone. I've modded that amp according to the schematics by Lyle Caldwell, changed the tone stack and the input impedance and added a choke. The 'No Feedback' position makes the amp break up early kind of like a 5E3 Deluxe. Good for ribbon cable replacement ! Your mod changed the way the tone stack reacts, there are many mod you can try there, and listen to the result. C9 = C18 (kinda nice to put on a switch) Coupling caps - change them out to Mallorys/Sozos for corksniffery good times. In general, the modifications I describe in How to Hot Rod Your Fender Amp can be adapted to other major brands of tube amps besides Fender, such as Marshall, Gibson, Vox, Ampeg, and Peavey. 1 uF bass cap with a. Second, the conventional TMB tone stack used by Fender and Marshall (and many other amps) are highly interactive. com have just posted some interesting items to eBay: the modified Marshall full stack Vai used on David Lee Roth's 1986 Eat 'Em and Smile album and lengthy supporting tour. 12" speaker is going to be a tight fit. Colorsound (Sola Sound) Fuzz (Stellan's Schematics); Overdriver - OK!I like this pedal! Initially designed to do clean boost. - It has a 220pF cap across each 470pF treble cap in each tone stack (as with the Plexi Channel mods). He said he removed all of the clipping diodes but had to re balance the pre amp stages and moved the tone stack to the end of the chain like the Marshall. The circuit laid out on a circuit board is known as the LiteIIb. the Dallas Rangemaster (what the Beano Boost is a clone of), was used with Marshall’s to get those iconic vintage Marshall tones we. Gerald Weber also says he's seen a lot of amps this way, but he personally prefers the. The added tone stack will cut volume coming from the single gain stage that makes the Natural channel. The Hiwatts David used from 1969-74 had a preamp tonestack that was similar to early Fender and Marshall tone stacks, different from the preamp tone stack that became the standard in later DR103s. There is an 18 watt "lite" circuit that has tremolo with only one input and sole tone control. The Blues Junior has a solid state rectifier which is generally brighter with a tighter bottom end. Good news is, there are more guys making more versions of this amp platform than just about any other amp. 047uf values. Switchable Tone Stack February 27, 2010 admin Mods The two main tone stacks used by Marshall over the years was first the 56k slope resistor and 250pf capacitor combination – this was used exclusively until 1968 on all their amps. The mods are presented as achievable without cutting tracks or removing the PCB from the chassis. A 2203 Marshall half stack with a Gibson plugged in provides a fantastic driving rock and roll distortion tone with punch. Magazine Reviews. I'm telling you it's a totally different amp. Sign in to follow this. Amp Mod Kit - MOD® Kits, Bass to Tremolo Conversion Kit - This kit adds tremolo to silverface Fender® Bassman amps such as the Bassman 70 or Bassman 100. The tone stack mod has been included in this amp. In the "blunt" setting, the last stage is a "stock" Marshall Shredmaster. Specification The original pedal was a great design that features tube-like amp stages, tube amp tone stacks, and a variety of tone shaping circuits that bring out the best in any. It's true that the circuit boards were re-arranged and the tone stack/signal path was altered (1984ish). Good for ribbon cable replacement ! Your mod changed the way the tone stack reacts, there are many mod you can try there, and listen to the result. It's a three channel amplifier with four EL34 and four 12AX7 tubes that features independent controls, a midboost, deep switch, tone shift, power reduction, output mute, reverb, line out, effects loop and more. Overall, the amp is extremely responsive. The mods sound great. The tone stacks are just a Baxandall in the Prowler w/notch filter that acts as a mid-boost in an active circuit (I do similar in my guitar amps), while the ValveKing is just a standard issue Marshall or Fender stack. Well, this book answered all of my questions and opened up some exciting possibilities for getting mo'better tone out of this amp: brownface or tweed tone stack mods, marshall preamp mod, dual reverb, different caps and values for different channels, channel bridging, which types of tubes to consider for more warmth. Just to level set things, I ll use the SVT II as my reference tone. The Plexi's topology is still very similar to the Fender 5F6-A Bassman. all i did was lift the legs on the r7 and r19 resistors. 5K R10 220 1K 3 Watt 1K 3 Watt R14 220 240 -270 1watt 240-270 1watt R15 1. Fender Champion 600 / Gretch 5222. 1959 Super Lead 100 Watt and 1987 Lead 50 Watt "Plexi" Preamp. Even without EQ the High/Normal volumes afford the user a substantial amount of tone adjustment. If you are not familiar with frequency response curves, the x-axis is a given frequency, while the y-axis tells how loud that frequency will be reproduced. The older Marshall circuits don't have less sizzle or distortion just less mid-range which makes that sizzle or distortion more apparent. It seems the designers were trying to compensate for the early tone stack placement by adding a final gain stage after a tone recovery stage, but, as you point out, putting the 470k/470pf network (you use 500pf in the MODS schematic) so late in the amp will not really duplicate the raspy sound of the 2204, which puts it after the 1st gain stage. Marshall 75W 5275 Schematic. Most pedal tone stacks use a single-band pass filter to either cut the highs or the lows from the signal. Big Muff Tone Control Circuit 'Fake' Variable Capacitors Marshall Gov'nor Tone Stack Mid Scoop Tone Control 2x Pot Tone. Blue Moon Lite Schematic July 10. Being a tinkerer, I then put in some better tubes and a Celestion Blue speaker. Sean Coyle-Smith from Shame uses the Rocker 32 Natural Channel as a clean base upon which he builds. DIY: Hot-Rodding The New Fender Champion 600! by John R. Mark Huss did this mod on the green board Blues Junior years ago. This mod will improve your Marshall's Clean tone. If you look in Mullard's circuit book, you will find two versions of the 5-10 amp. About the different models: The Peavey 5150 should need no introduction. As with the Combo it is an All Valve, Class A, Cathode Bias, Single Ended Design with NO Transistors, Chips, Digital Processing or SMT (Surface Mount Technology). I like putting the reverb on both channels and then modifying the Normal channel and using an A/B/Y switch to use either channel. Marshall 9200 2X100W Schematic. Tweak the values in the tone stack after V2a--that is a TMB tone stack with the values for bass, mid and treble at fixed values. 18watt Technical Discussion. This mod works better with the PPI2 Master Volume Mod installed so you can control the volumes better and maximize gain potential. For the icing, I put in an ALNICO Weber 8 inch.
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