Reverb Tank - Mod® 4BB3C1D, Long Decay, 2-Spring

Reverb Tank - Mod® 4BB3C1D, Long Decay, 2-Spring

Mod Electronics
Reverb Tank - Mod® 4BB3C1D, Long Decay, 2-Spring image 1
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In Stock
  • Replaces: 4BB3C1D
  • Solid, sturdy construction
  • Type: Long (2 Spring) tank
  • Decay: long decay
  • Input: 150 Ω
  • Output: 2,250 Ω
  • Connectors: Input insulated/output grounded
  • Locking: No lock
  • Mounting: Vertical/connectors down

Compatible amps include Marshall™ DSL60, TSL60, DSL100, TSL100, DSL201, DSL401, TSL122.

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 insulated, output grounded
Decay Timelong (2.75 to 4.0 s)
Grommet Hole Diameter0.2 in.
Input Impedance150 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 Planevertical, connectors down
Output Impedance (Zout)2.25 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 January 10th, 2018.
January 10th, 2018
Staff Member
You are correct in saying that the difference is the mounting plane indicated by the "B" is mounted horizontally, while the "D" is mounted vertically. The stock photo on this listing does not represent the way it is intended to be mounted.
Asked by Anonymous on January 25th, 2018.
Matt H.
January 25th, 2018
Staff Member
From our limited resources the 4BB3C1D should work with the DSL 50.

Product Reviews

4.20 out of 5 based on 5 reviews
EZS - April 8th, 2019
2 out of 5

Sent me reverb tank missing a mounting grommet and assembled wrong. I was surprised at the lack of detail. - July 29th, 2018
5 out of 5

The MOD reverb tanks are well made and are reasonably priced.

Nichsobo - July 20th, 2018
5 out of 5

I had bought this tank as a replacement for my Marshall TSL 602 that I had bought used missing the original tank. I have no idea how it sounded before but this tank sounds better than any other reverb I’ve heard on a Marshall amp. It sounds very full and deep for a Marshall reverb. Obviously it’s not as prevalent as something like a deluxe reverb but for what it is I would say it’s pretty good

Joe Bob - April 7th, 2016
5 out of 5

Perfect fit! Pure spring reverb sound!

kgreenman21 - March 3rd, 2015
4 out of 5

It works well. I installed in a Marshall JCM 2000 DSL 50. I never heard the original reverb tank that this replaced, so I can't really compare. It sounds great with the clean channel and I'm still trying to decide if I like it with the lead channel instead digital reverb.