Reverb Tank - Mod® 9AB2A1B, Medium Decay, 3-Spring

Reverb Tank - Mod® 9AB2A1B, Medium Decay, 3-Spring

Mod Electronics
Reverb Tank - Mod® 9AB2A1B, Medium Decay, 3-Spring image 1
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In Stock
  • Replaces: 9AB2A1B
  • Solid, sturdy construction
  • Type: Long (3 Spring) tank
  • Decay: medium decay
  • Input: 10 Ω
  • Output: 2,575 Ω
  • Connectors: Input grounded/output grounded
  • Locking: No lock
  • Mounting: Horizontal/open side down

Compatible amps include select Fender®models, select Vox® AC30 models, Engl® Screamer, Mesa Boogie® MK1,MK2,MK3,MK4,MK5, Maverick, Transatlantic 30, Blue Angel, Heartbreaker, Roadking II, Trem-O-Verb, DC Models, Express Models, Roadster, Lonestar,Electradyne, RA-100, Lonestar Special, plus others.

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.

Item ID:
Input Impedance:
Number Of Springs:
Output Impedance:
Tank Length:
RoHS Compliant
Product Measurements by Type
Connectorsinput grounded, output grounded
Decay Timemedium (1.75 to 3.0 s)
Grommet Hole Diameter0.2 in.
Input Impedance10 Ω
Item Height1.5 in.
Item Length16.75 in.
Item Width4.25 in.
Mounting Hole Center to Center A8.75 in.
Mounting Hole Center to Center B3.75 in.
Mounting Planehorizontal, open side down
Output Impedance (Zout)2.575 kΩ
Thickness0.04 in.
Packaging Information
Packaging Dimensions17 in. × 5 in. × 3 in.
Weight (Packaging)1.75 lbs.

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Questions and Answers

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Asked by Anonymous on August 9th, 2020.
August 10th, 2020
Staff Member
We do not have reference materials to determine what tank is needed for that amp, but the tank currently in the amp should have some identifiable markings that can be used to find the right tank. We suggest pulling the tank out of the amp and inspecting it for any codes.
Asked by Anonymous on March 28th, 2022.
March 28th, 2022
Staff Member
The closest tank we carry is the 9BB2C1B:

Product Reviews

5.00 out of 5 based on 2 reviews
Thomas Lucas - April 23rd, 2022
5 out of 5

You see this one a lot in MESA amps as well as some other well known brands. I prefer the sound of the MOD brand Reverb pans over the original Accutronics ones, it seems to have a better tone overall. You should give them a try sometime and see for yourself the difference! - January 8th, 2018
5 out of 5

Meh! The Mesa Boogie reverb could stand being upgraded to the longer decay tank. If you want to keep it original, this is as close as you will come, unless you can find an old Folded Line Gibbs tank. These seem more robust than the original Mesa tanks, which tend to crap out in the send or receive coils. I suspect it is the physical design of the head that subjects the tanks to physical vibration/abuse. Most techs h8 working on Mesa Boogie amps. To them, I say, "Wait until you crack open an Engl!" Then Mesa Boogie won't seem nearly as bad, but they are still a pain in the neck.