MOD® Reverb Tanks

Mod Reverb Tanks were carefully designed and researched to bring the warmth of a vintage sounding reverb to your amp.

What people are saying about MOD® Reverb Tanks:

"Longest decay rate of the three, very broad tone and is best suited for those who desire a long decay, ambient sounding reverb. Almost sounds like a large room. Lots of bottom end. Lots of hang time/dwell."

Questions and Answers
Click each question to see its answers. Looking for general answers about Mod Kits? See our frequently asked questions.
I think I need a reverb tank for my Tech21 Trademark 60. I'm not sure what the ohms should be for the input and output. Mine is open on the input. And the output is only 60ohms. I bought the Amp used and I'm sure it was messed with. If you have the info on which one I need I'll order it as soon as you let me know which model. Thanks.
Answers (1)
MichaelT
Staff Member
January 29th, 2019
We haven't been able to locate any information on the tank used in that model. You may want to reach out to the manufacturer if there is not a code printed on the tank.
Verified Answer
Can I use a 4AB3C1B in a Vox AC30CC2?
Answers (1)
MichaelT
Staff Member
January 31st, 2019
It won't work correctly. The 4EB3C1B has the same number of spring and same decay length as that tank but with the correct impedances for the Vox. The 4AB3C1B will work in many Fender amps though.
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Which tanks will fit my Mesa Boogie Fillmore 50?
Answers (1)
MichaelT
Staff Member
February 11th, 2019
There isn't any information on that one yet. Many Mesa amps with a long tank use the 9AB2A1B. I would recommend checking your tank to see if there are any stickers/stamps with a model number.
Verified Answer
I have a 95 fender blues deville. Which tank should I replace with to get the biggest reverb sound possible.
Answers (1)
MichaelT
Staff Member
February 12th, 2019
The original non-reissue Blues Deville uses a 4BB3C1B.
Verified Answer
Can you change an amp with digital reverb like the blackstar ht club 40? Or Add to an amp that doesn’t have reverb?
Answers (2)
MichaelT
Staff Member
February 19th, 2019
It's possible but requires a good amount of circuitry and possibly an addition power supply. Stand alone spring reverbs are an easier solution and can be put in the fx loop for a similar signal path.
Verified Answer
MichaelT
Staff Member
February 19th, 2019
It's possible but requires a good amount of circuitry and possibly an addition power supply. Stand alone spring reverbs are an easier solution and can be put in the fx loop for a similar signal path.
Verified Answer
I need a Reverb Tank for my 1985 Peavey Special 130 Amp. Do you have one for it? I bought the amp today and the reverb tank was missing. So, I need a new one.
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No answers yet!

Hi, Which MOD tank comes in the Carr Rambler & I love it...? How do I pick one out for my Mesa Boogie DC3 combo? Is the tank in the Rambler considered medium or long? Thanks, Kenny
Answers (1)
MichaelT
Staff Member
February 25th, 2019
Hey Kenny. You might want to double check with Carr but I think they use a 4AB3C1B in that amp. A 4AB3A1B should work in the Mesa and be closer to that Carr tank. Keep in mind that the circuits around the tanks might have a different sound too.
Verified Answer
Hello there I have a Mesa Blue Angel amp with a broken tank it's a 3 spring model With 9AB2A1B serial no and Sounds enhancements Inc on it. Would you have a tank for me ?
Answers (1)
MichaelT
Staff Member
March 4th, 2019
We have a 9AB2A1B that can be purchased here: https://www.amplifiedparts.com/products/reverb-tank-mod-9ab2a1b
Verified Answer
I have a Vox Pathfinder 15R combo, I would like to replace the spring reverb unit inside. What options would you suggest for me?
Answers (1)
MichaelT
Staff Member
March 11th, 2019
We don't have one that will fit inside as a replacement but have seen people modify their amps to connect to an 8EB2C1B.
Verified Answer
hello I have an Ampeg SuperJet 12R (Blue Diamond ) it needs a new tank , the original one is a Belton BS2BB2C1A, any idea of what would be the mod tank for it , I woud like to order, thanks
Answers (1)
MichaelT
Staff Member
March 11th, 2019
We don't have an exact equivalent to that tank which would be a 4BB2C1A. One we have that will work is the 4BB3C1B. There are two differences in this tank. The first is that it has a long reverb decay whereas your original tank has a medium. The other is that this tank is meant to be mounted with the open side facing down whereas your original tank is meant to be mounted with the open side facing up. Send us an email at info@modkitsdiy.com if you have any questions!
Verified Answer
Can a reverb tank from a Fender Frontman 25R be installed on a Champion 30 that has no reverb at all? I don't want to go digital. Can anyone help? Thanks. Any good drummer jokes?
Answers (1)
MichaelT
Staff Member
March 18th, 2019
A spring tank needs additional circuitry to function in an amplifier. You might want to look into stand alone spring reverb unit or pedal.
Verified Answer
Hi, I would like to replace the missing Reverb Tank in a Carvin x100b series 3 head. Since the original one was missing when I bought it, I have no clue as to which MOD tank will work. Thanks!
Answers (1)
MichaelT
Staff Member
March 18th, 2019
There isn't a lot of info around on that model. It might be worth reaching out to the manufacturer to see if they could provide the tank code.
Verified Answer
Hello I need a replacement tank for a Carvin Bel air 212 the model number is 9GB2C1B from Accutronics. Please let me know the exact replacement that will work for this amp.
Answers (1)
MichaelT
Staff Member
March 22nd, 2019
The highest input impedance we have is F. We don't have a compatible tank for the 9GB2C1B.
Verified Answer
Replacement for a short tank 2EB2C1B on a monoprice 1x12 15watt amp?
Answers (1)
MichaelT
Staff Member
April 3rd, 2019
We have a three spring 8EB2C1B which is compatible with the tank you listed. We also carry a 8EB3C1B which is the same thing but with a long decay and the 8EB1C1B which has a short decay.
Verified Answer
How different do the long, medium, and short tanks sound?
Answers (1)
MichaelT
Staff Member
April 15th, 2019
Check out this video comparison! https://youtu.be/ZNHZEQRDOOI
Verified Answer
I want to replace the Accutronics reverb tank (4BB3C1B) in my Ampeg VH140c for the most lush/ambient/big sounding reverb tank possible. Which one should o choose?
Answers (0)

No answers yet!

Replacement tank for Traynor YCV50 Blue 50w 1x12 Combo
Answers (1)
MichaelT
Staff Member
April 15th, 2019
That amp uses a 4EB3C1B.
Verified Answer
I'm looking for a reverb tank for a Crate Vintage Club 20 amplifier. The original tank was a Belton two-spring short-tank--the only designation that I can see on the tank is a small sticker that reads "70-222-01". Is there any tank, exact or close to it, that will work for this amp? Thanks!
Answers (1)
MichaelT
Staff Member
April 15th, 2019
The schematic lists a tank with a 1k4 input impedance and a 4k output impedance. We do not have a take that matches these. The closest tank we carry is the 8FB3C1B but we have no way to verify that this tank will work in the amp.
Verified Answer
What tank will work best for my 1966 magnatone mp-3? Im looking for a drippy 60s dick dale reverb.
Answers (1)
MichaelT
Staff Member
April 15th, 2019
From the schematic floating around online, this amp has a reverb driver transformer with an 8 ohm secondary. I'm not sure if it will definitely work but the first tank I would try is the 4AB3C1B. This is the standard tank used in Fender amps which as also use reverb driver transformer with an 8 ohm secondary. It's also the same tank in their stand alone reverb unit which is what Dick Dale used.
Verified Answer
I want to build a stand-alone reverb using the smallest power supply possible. What are the requirement specs for your smallest reverb tank?
Answers (1)
MichaelT
Staff Member
April 17th, 2019
Your best bet for a small power supply is going to be a solid state circuit. The smallest tanks we sell are 9.25" length x 3.375" width x 1.313" height. These come in a variety of different impedances and grounding schemes.
Verified Answer
I see that the short tank 8EB2C1B is for a Fender Vaporizer. It has and Input Impedance 800 Ohms, Output Impedance 2575 Ohms. The 9EB2C1B has the same impedances, in a 16.75" long spring size - is this unit interchangeable? Is there any benefit from the long spring unit vs. short?
Answers (1)
MichaelT
Staff Member
April 17th, 2019
The 9EB2C1B will work in place of an 8EB2C1B. I would suggest making sure there is enough room to fit the larger tank. The differences can be hard to describe but a lot of people think that the full sized tanks sound bigger and airier than the small sized tanks. You can also pick a tank with a different decay time to alter the sound. 8EB2C1B and 9EB2C1B will have a medium decay length whereas the 9EB3C1B will have a long decay length.
Verified Answer
I have a 1954 Magnatone Varsity 108 and it needs reverb. Which tank do you recommend, and could you provide a parts list and schematic/wiring diagram for this modification?
Answers (1)
MichaelT
Staff Member
April 22nd, 2019
We don't have any kits or instructions for adding spring reverb to an amplifier without a reverb circuit. This type of modification is unique to each amplifier, can require quite a bit of custom circuitry and often would require a new power transformer or the use of multiple power transformers. A stand alone spring reverb unit or a spring reverb pedal is a much easier/cheaper solution to get reverb with an amp.
Verified Answer
I have 60s era Thomas vox Solid State amplifiers that need new reverb tanks. Both input and output transducers on the original Gibbs tanks read a nominal DC resistance is approximately 170 ohms. Do you have a replacement?
Answers (1)
MichaelT
Staff Member
April 29th, 2019
DC resistance is unfortunately not much to go off since it can vary so much from the impedance. If you have model numbers I can look to see if there is any information on these amps and their reverbs.
Verified Answer
I have a broken reverb tank with code 9ab2a1b and a working reverb tank with code 4eb2c1b. The 9ab2a1b is the stock reverb tank from an Engl Classic Tube 50. Since the impedances are different - can I use the 4eb2c1b reverb tank instead or could this do any harm to the Engl amp?
Answers (1)
MichaelT
Staff Member
April 29th, 2019
It might not harm the amp but it will not work correctly.
Verified Answer
Hi, I need a replacement for a Accutronics 8CB3E1E from a Hughes & Kettner Statesman Quad EL84. There are any reverb tank compatible with that?
Answers (1)
MichaelT
Staff Member
May 2nd, 2019
We don't have anything compatible with that one. It's a pretty uncommon tank code. You might want to reach out to the manufacturer of the amp to see if they could supply one for one.
Verified Answer
Fender princeton '65 reverb reissue. the one that came with it is WAY too "springy" I want a more modern ambient one. help please
Answers (1)
MichaelT
Staff Member
May 6th, 2019
I think you might like the sound of Mod tanks given your description. Check out this video comparing 4AB3C1B reverb tanks from different manufacturers to get an idea of the tonal differences: https://youtu.be/c1IIiv89Qoc They're using the 4AB3C1B which is the stock tank in a Princeton Reverb like an Accutronics in your amp. I think you might also be interested in the 3 spring version which is a 9AB3C1B. This video compares the three spring with the two spring: https://youtu.be/Wg8hBVHEAqo
Verified Answer
What would a replacement Reverb tank for a Peavey Studiopro 40?
Answers (1)
MichaelT
Staff Member
May 13th, 2019
There isn't a lot of info on this amp available. It might be worth contacting the manufacturer. I know Peavey used the 8EB2C1B a lot but that is only a guess and a confirmed answer from them would be preferable.
Verified Answer
Howdy, I need a reverb tank for a Marshall Valvestate AVT50 Combo.
Answers (1)
MichaelT
Staff Member
May 20th, 2019
A search online shows the 8DB2C1D as a compatible tank for that amp. I would still recommend checking the old tank for any markings to be sure since a schematic is not readily available to confirm this.
Verified Answer
I have a 1982 Legend Model A 30 amp with the black cloth and Eminence Legend G12-30 speaker. It is not a series II, it is the original design. The reverb tank is missing. What would be the replacement tank? Pretty sure it would be a type 4, but no idea on the impedances.
Answers (1)
MichaelT
Staff Member
May 24th, 2019
The schematic found online lists an input impedance of 1475 and an output impedance of 2250 so the FB tanks will be the compatible ones. It also looks like the input needs to be insulated and the output is grounded. The 8FB3C1B looks like it should be compatible as long as the schematic is accurate. If it has room for a longer tank the 4FB3D1B might work but the output jack might need to be modified to be grounded on this tank. This would require jumpering two solder pads on the output jack inside of the tank.
Verified Answer
Reverb kit for Marshall dsl15c
Answers (0)

No answers yet!

vox ac15 newer amp what tank?
Answers (1)
MichaelT
Staff Member
May 28th, 2019
The AC15C1 uses an 8EB2C1B.
Verified Answer
Tank replacement for the early 80s Ampeg v7?
Answers (1)
MichaelT
Staff Member
June 5th, 2019
There is not much out there on this one, not even a proper schematic. Are there any marking on the original tank?
Verified Answer
Replacement Reverb tank for a 50 watts tude Epiphone head.
Answers (0)

No answers yet!

Hi, I have a Fender era Sunn T50C combo. What would be the proper reverb tank replacement? Thank you.
Answers (1)
MichaelT
Staff Member
June 20th, 2019
The schematic lists the 4AB3C1B as the tank used in the T50C.
Verified Answer
I'm looking for an alternative or clone for the accutronics 9AB21B.
Answers (1)
MichaelT
Staff Member
June 26th, 2019
Is there a letter after the 2 on your code ie 9AB2_1B?
Verified Answer
Hi I have a small combo Crate GX-20M/R, the reverb tank it's not labeled normally, it just says "79-301-01" n one sticker, and "8" on a separate sticker. It has 2 exposed 9" springs, and ather than float on support springs, it is glued to the amphead's frame with a foamlike glue. I was guessing a 1AB2B1B or a 1BB2D1B (along those lines) seems plausible, but i am completely out of my element here and sadly i don't have the proper tools or expertise to measure the correct impedance, would kindly appreciate any guidance!
Answers (2)
MichaelT
Staff Member
July 1st, 2019
There isn't much to go off on this one. I would guess that it is not going to be an AB type since these are more common to transformer driven circuits. BB, DB, EB, or FB would be more likely. Solid state circuits often use a higher impedance input. Looking at a schematic on the GX amps, the input probably needs to be insulated and the output sleeve is likely grounded.
Verified Answer
Anonymous
July 1st, 2019
Thanks MichaelT, I'll carry on with my research if i get it working i'll come back and update. Have fun during the holidays.
Could you please recommend a replacement tank for the vintage Selmer treble n bass sv reverb 50, its a short 2 spring reverb tank but one transducer has broken off.
Answers (1)
MichaelT
Staff Member
July 12th, 2019
I don't have any way to verify this but there is a guy on Youtube with one of these. He put a full sized 9AB3C1B in his but mentioned the original was a short tank. The short version of this would be the 8AB3C1B.
Verified Answer
Need rich lush upgrade tank for solid state fender Princeton 112 What do u think? Thx
Answers (1)
MichaelT
Staff Member
July 17th, 2019
The service manual says the stock tank is an 8EB2C1B. I always recommend double checking these against the one in your amp in case there have been any changes. The 8EB2C1B is a short 3-spring medium-decay tank. For the same specs but with a long decay you could use the 8EB3C1B. I'm not sure if there is room in that amp for a full sized tank but if there is, the 4EB3C1B would be a good choice. This is a 16.75" 2-spring long-decay tank that can work in place of the 8EB2C1B. Be sure to check the dimensions inside your amp though!
Verified Answer
Hi can I hook This up to a Fender blues break your head there’s no special plug-in for reverb I just have a line out input jack or a line out and a Import check loan out for speaker
Answers (1)
MichaelT
Staff Member
July 22nd, 2019
Reverb tanks need specific circuitry to function in an amplifier. Without modding the amp or using external equipment, a reverb tank will not function with that amp.
Verified Answer
Hello I have a LAB series L11. The tank is too corroded to read any numbers on it. Would you happen to know the model I need? Thanks.
Answers (1)
MichaelT
Staff Member
July 24th, 2019
There is a schematic online that lists the following models: L5 Model 308A, L7 Model 309A, L9 Model 312A, and the L11 Model 313A. You might want to check yours against this schematic to make sure it is the same L11. This schematic lists the tank's input impedance as 8 ohms and the output as 2250 ohms. The 4AB3C1B might be a compatible tank. We have no way to verify it but if you have a Fender amp or a friend with one, many of them use the 4AB3C1B so you might be able to test it out.
Verified Answer
Hello there, i have a Mesa/Boogie Satellite 60 with no reverb. Can i mod it with your tank? If so how? Thank you
Answers (1)
MichaelT
Staff Member
August 12th, 2019
Unless the amp already has the drive and recovery circuits needed, a spring reverb tank is not compatible without heavy modifications.
Verified Answer
I'm looking for the proper reverb tank for an ASI Quantum QTube 70 - there are cables to connect one, but the actual tank is missing on my unit. Any recommendations? Thanks!
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No answers yet!

Do you have a reverb unit for a Ampeg G12 Gemini 1 amp? I was told an accutronics 4FB2D1B would work. Thank you Bob Ackerman Cascio Interstate Music.
Answers (1)
MichaelT
Staff Member
August 29th, 2019
The 4FB2D1B is compatible with the Type C tanks that were commonly used in the tube driven Ampeg reverb circuits. The version we carry has the long decay and is the 4FB3D1B.
Verified Answer
What reverb tank is made for a Fender Super Sonic 60 manufactured in 2009?
Answers (1)
MichaelT
Staff Member
September 9th, 2019
The schematic from 2009 for the Supersonic 60 shows a 4AB3C1B tank.
Verified Answer
hi there, i have a peavey classic 30.what reverb unit would be a good replacement for it that sounds great? thanks so much,brian
Answers (1)
MichaelT
Staff Member
September 11th, 2019
The stock tank is a 4EB2C1B. If you would like a compatible tank with a longer decay time, the 4EB3C1B would work. The 9EB2C1B is the three spring version of the stock tank. We also have the three spring version with the long decay time which is the 9EB3C1B. Check out the videos linked below for some sound comparisons of the variations listed here. Decay length comparison: https://www.youtube.com/watch?v=ZNHZEQRDOOI 2 vs 3 spring: https://www.youtube.com/watch?v=Wg8hBVHEAqo
Verified Answer
Hi, I'm looking for a 9AB3C1C tank but haven't found one. Do you have any recommendations?
Answers (1)
MichaelT
Staff Member
September 16th, 2019
A 9AB3C1B will likely work in its place but I would suggest testing before fully installing to be sure.
Verified Answer
Hello, I just purchased your MOD 8EB2C1B reverb tank. I always have my amp on the floor, tilted back 30 degrees, so the speaker is pointing up. Should I mount the reverb tank at -30 degrees (relative to the amp) so the tank is parallel with the floor when the amp is tilted? Thanks!!
Answers (1)
MichaelT
Staff Member
September 23rd, 2019
You should be good to install it flush to the bottom of the cabinet. There shouldn't be any noticeable difference in the sound or functionality with it tilted back.
Verified Answer
I need a reverb tank for a 1982 Fender Princeton Reverb II. The original tank was an Accutronics 8AB2C1B. Do you have one that can be used as a replacement?
Answers (1)
MichaelT
Staff Member
October 10th, 2019
We don't have a tank that is compatible without potential modifications to the grounding scheme. You might have better luck finding an 8AB3C1B. That tank only differs in that the decay length and won't require any modifications for use.
Verified Answer
Hello, I need a replacement tank for a fender frontman 15r. 1bb2e4a. I can't find one that matches, any help
Answers (1)
MichaelT
Staff Member
October 16th, 2019
That one does not have the outside chassis like most tanks so I'm not sure if anyone will be selling them as a retail product. You might be able to use a tank with similar impedances to replace it. Some people modify that amp for RCA jacks to use common tanks. Another way would be to modify the tank by removing it from the chassis and rewiring it so it can mount internally.
Verified Answer
What reverb tank is compatible with Fender "Twin Amp" Black knob '94.
Answers (1)
MichaelT
Staff Member
October 21st, 2019
The schematic for that amp shows part number 064063 which is the 4AB3C1B.
Verified Answer
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