Reverb Tank - Mod® 4AB3C1B, Long Decay, 2-Spring
- Replaces: 4AB3C1B
- Solid, sturdy construction
- Type: Long (2 Spring) tank
- Decay: long decay
- Input: 8 Ω
- Output: 2,250 Ω
- Connectors: Input insulated/output grounded
- Locking: No lock
- Mounting: Horizontal/open side down
Compatible amps include tube reverbs from 1963-1990 such as the Princeton Reverb, Vibrolux Reverb, Deluxe Reverb, Super Reverb, Pro Reverb, Twin Reverb, Quad Reverb, Super Six Reverb, Vibrosonic Reverb. This also includes all reissue equivalents. Also includes Fender® ’63 Reissue Reverb Unit, Fender® Concert II, Mesa Boogie® MK2C plus other models, LAB® Series L5, L7, L9, Koch® Powertone I, B-52® AT-100. Also compatible with some speaker-driven, type F, vintage Ampeg® amps such as B12X, B12XY, Echo Jet, Echo Twin.
The Mod Electronics Reverb Tanks are high quality upgrade units. Some of the major differences between the Mod®s and other reverb tanks are that the Transducers are wired directly to their respective RCA jacks as opposed to current production tanks where Transducers are connected by a detachable plug to their respective RCA jacks. This makes the tanks less receptive to any outside interference. The original Hammond Accutronics tanks from the 1960s were also wired directly to their respective RCA jacks. In addition, very close attention has been paid to the spacing and size of the lamination of the Transducers resulting in a more vintage like tone.
Questions about reverb tanks? See our tech articles for more information.
SKU:
P-RMOD-4AB3C1B
Item ID:
003293
UPC/EAN:
797734820928
Connector Type:
Decay Time:
Input Impedance:
Mounting Plane:
Number Of Springs:
Output Impedance:
Tank Length:
Type:
RoHS Compliant
| Connectors | input insulated, output grounded | |
| Decay Time | long (2.75 to 4.0 s) | |
| Grommet Hole Diameter | 0.2 in. | |
| Input Impedance | 8 Ω | |
| Item Height | 1.5 in. | |
| Item Length | 16.75 in. | |
| Item Width | 4.25 in. | |
| Mounting Hole Center to Center A | 8.75 in. | |
| Mounting Hole Center to Center B | 3.75 in. | |
| Mounting Plane | horizontal, open side down | |
| Output Impedance (Zout) | 2.25 kΩ | |
| Springs | 2 | |
| Thickness | 0.04 in. |
| Packaging Dimensions | 17 in. × 5 in. × 3 in. | |
| Weight (Packaging) | 1.75 lbs. |
 Sound Sample - Drum Machine Clap | All Models |
| Sound Sample - Drum Machine Snare | All Models |
| Sound Sample - Quick Strum | All Models |
| Sound Sample - Stacatto | All Models |
| Sound Sample - Sustained Chord | All Models |
| Sound Sample - Tremolo Chords | All Models |
My Project Lists
Specifications, Files, and Documents
Sound Samples:
Sound Sample - Drum Machine Clap00:05https://www.tubesandmore.com/sites/default/files/associated_files/mod_reverb_tank_16pt25_2-spring_long_drum_machine_clap.mp3
Sound Sample - Drum Machine Snare00:06https://www.tubesandmore.com/sites/default/files/associated_files/mod_reverb_tank_16pt25_2-spring_long_drum_machine_snare.mp3
Sound Sample - Quick Strum00:06https://www.tubesandmore.com/sites/default/files/associated_files/mod_reverb_tank_16pt25_2-spring_long_quick_strum.mp3
Sound Sample - Stacatto00:07https://www.tubesandmore.com/sites/default/files/associated_files/mod_reverb_tank_16pt25_2-spring_long_stacatto.mp3
Sound Sample - Sustained Chord00:08https://www.tubesandmore.com/sites/default/files/associated_files/mod_reverb_tank_16pt25_2-spring_long_sustained_chord.mp3
Sound Sample - Tremolo Chords00:09https://www.tubesandmore.com/sites/default/files/associated_files/mod_reverb_tank_16pt25_2-spring_long_tremolo_chords.mp3
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Questions and Answers
Click each question to see its answers.
1 answers
Will this sound good in my Twin?
Asked by Anonymous on November 16th, 2016.
November 16th, 2016
Staff Member
The construction of these MOD tanks is designed to sound as close as possible to vintage reverb tanks of the 60's.This tank would serve as a great upgrade to the stock unit in a Fender Twin.
1 answers
I have just got a used Fender Sidekick 25 Reverb in working order. Unfortunately the reverb tank is missing.
Asked by Anonymous on November 16th, 2016.
November 16th, 2016
Staff Member
You will want to determine several factors regarding your reverb circuit such as input/output impedance, mounting orientation,number of springs, etc. I would suggest visiting our tech corner for a full explanation of reverb tanks. I'll include the address below: https://www.tubesandmore.com/tech-corner/spring-reverb-tanks-explained-and-compared
1 answers
Hi, I have a Fender 1968 deluxe reverb,AB763, and I am looking for a nice lush reverb. Would this be the one to use?
Asked by Anonymous on November 16th, 2016.
November 16th, 2016
Staff Member
The MOD series tanks are designed to sound much closer to vintage sounding reverb tanks than other brands and their construction lends itself well to this goal. This will definitely be a great upgrade or replacement and should provide a nice lush reverb for your deluxe.
1 answers
Does this reverb tank fit in a Fender Prosonic?
Asked by Anonymous on November 16th, 2016.
No answers yet!
1 answers
Would it sound any better than the factory tank on a Fender Blues Deluxe reissue?
Asked by Anonymous on November 17th, 2016.
November 17th, 2016
Staff Member
Most MOD owners feel that these reverb tanks are the most accurate to the original tanks found in vintage Fender amps. In most cases this would be considered an upgrade.
1 answers
I have a Peavey Valveking 112 and would like to upgrade my reverb. I can hardly hear it.
I would love to find a new spring reverb that could be heard better. I bought the amp new 8 years or so. Sounds great with new tubes clean loud, and breakes up when I want it to also loud when I need it. now i'd like a new reverb tank -- Help
Asked by Anonymous on November 17th, 2016.
November 17th, 2016
Staff Member
Hi, from our limited research it appears that you need an 8EB2C1B for your Valveking. I would confirm this by looking at the number on your tank.
1 answers
Will this work with no alterations in the current Fender '65 Princeton Reverb amps?
Asked by Anonymous on November 17th, 2016.
November 17th, 2016
Staff Member
Yes, this will work in your '65 Princeton Reverb.
1 answers
What other tank options are there for a '63 reissue fender reverb unit?
Asked by Anonymous on March 16th, 2017.
March 16th, 2017
Staff Member
As long as the second and third character match (AB) you can play around with the other options. The first character will describe the tank size and number of springs. The fourth character represents your decay time and comes in three different types (short, medium, and long). For more information please see our reverb tank article in the tech corner above.
1 answers
Is this an improvement over the stock PRRI reverb tank?
Asked by Anonymous on September 20th, 2017.
September 20th, 2017
Staff Member
Yes, we believe that the MOD series of reverb tanks are an improvement. These tanks are made as close as possible to the original USA made Accutronics tanks.
1 answers
Would this work in my Hot Rod Deluxe??
Asked by Anonymous on October 14th, 2017.
October 17th, 2017
Staff Member
The 4EB3C1B is the proper replacement for your Hot Rod Deluxe.
1 answers
Would this tank be correct for a Fender Supersonic 22?
Asked by Anonymous on January 10th, 2018.
January 10th, 2018
Staff Member
Although we have not been able to verify this information, our customers have reported that this is the correct tank for the Supersonic 22.
1 answers
Will this tank fit in a Valvetrain Spring Thing?
Asked by Anonymous on May 26th, 2018.
May 31st, 2018
Staff Member
We are not sure if this is compatible with the Spring Thing. What you will want to do is examine the tank and find the tank code.
1 answers
Is this the longest decay plate for a 60's fender deluxe? Reverb Tank - MOD®, 4AB3C1B
Asked by Anonymous on September 5th, 2018.
September 5th, 2018
Staff Member
Yes, this is built with the longest decay time for reverb tanks.
1 answers
I have an old Fender Princeton Reverb II from the 80s with a short reverb tank and would like to change to a long tank. Which tank will work for this amp?
Asked by Anonymous on January 29th, 2019.
January 29th, 2019
Staff Member
We do not advise changing the size of the tank, simply because there are no 9.25" and 16.75" tanks that share the same input and output impedances.
1 answers
Do you know if this will work in a Fender Supersonic 60. thanx
Asked by Anonymous on June 20th, 2020.
June 23rd, 2020
Staff Member
Customers have reported this being the appropriate tank for the Super Sonic 22, so there is a very good chance this is the correct tank for your amp, but we do not have a way to verify this to be true.
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Product Reviews
Used this tank to replace the original (which had failed) in a 1968 Princeton Reverb.It fit perfectly and is more reverb than I'll ever need, the long decay time takes some getting used to, but overall I think it sounds great.
The MOD rverb tank was easy to install and sounds great. This is the brand used by Carr Guitar amplifiers.They recommended this MOD reverb tank over other more well known brands and after hearing it I understand why.
I have a 1968 SUNN Solarus amp head that I'm restoring. Someone removed the reverb tank and cut down the box approximatley 3 inches. I made a new box with the proper dimensions (24"x10"x10") installed new MOD reverb tank and new RCA cables and she's back to her glory. Thanks
I installed this tank in a silverface Princeton Reverb. The original Accutronics tank had dropped a spring when a transducer broke, and sounded terrible as a result. This tank has a longer decay than I think is typical of vintage Fenders, but otherwise sounds great! Full-on surf sounds are there if you want them, as well as more moderate settings. Installation is easy! I'm glad I did this.
I installed this tank in a silverface Princeton Reverb. The original Accutronics tank had dropped a spring when a transducer broke, and sounded terrible as a result. This tank has a longer decay than I think is typical of vintage Fenders, but otherwise sounds great! Full-on surf sounds are there if you want them, as well as more moderate settings. Installation is easy! I'm glad I did this.
Great tank!!!! I would highly recommend these and would purchase them again for sure!!!!
worked out better than stock.
Mine was loosely shipped in a bigger box with my other items. It failed after about 3 hours use. AES had me ship the defective one back which cost me more than buying one...
Now I have a two week or so wait for another tank to arrive and a customer without reverb in his amp. The tank did sound pretty good while it lasted. I could have bought one locally and will probably have to for this customer.
Everything was really smoothm, thank you, the product arrive perfectly very well packaged and worked without any problem, thank you for a great transaction and a satisfied customer.
Great part, great price