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Reverb Tank - Mod® 4FB3A1A, Long Decay, 2-Spring

Mod Electronics
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Reverb Tank - Mod® 4FB3A1A, Long Decay, 2-Spring

$27.95
In Stock
  • Replaces: 4FB3A1A
  • Solid, sturdy construction
  • Type: Long (2 Spring) tank
  • Decay: long decay
  • Input: 1,475 Ω
  • Output: 2,250 Ω
  • Connectors: Input grounded/output grounded
  • Locking: No lock
  • Mounting: Horizontal/open side up

Compatible amps include most vintage Ampeg® amps with capacitance driven reverbs such as the Rocket, Reverberocket (tube-driven), Jet, Gemini, AC12, B12XT, GV15, GV22, V2, V4, VT22, VT40. Also compatible with select Kustom® amps from the 60s and 70s.

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-4FB3A1A
Item ID:
039596
UPC/EAN:
841358106248
Connector Type:
Grounded Input, Grounded Output
Decay Time:
Long (2.75 to 4.0 s)
Input Impedance:
1,475 Ohm
Mounting Plane:
Horizontal, Open Side Up
Number Of Springs:
2 Springs
Output Impedance:
2,250 Ohm
Tank Length:
Long (16.25")
Type:
Reverb Tanks
RoHS Compliant
Product Measurements by Type
Connectorsinput grounded, output grounded
Decay Timelong (2.75 to 4.0 s)
Grommet Hole Diameter0.2 in.
Input Impedance1,475 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 up
Output Impedance (Zout)2.25 kΩ
Springs2
Thickness0.04 in.
Packaging Information
Packaging Dimensions17 in. × 5 in. × 3 in.
Weight (Packaging)1.2963 lbs.

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Questions and Answers

Click each question to see its answers.
Asked by Anonymous on August 30th, 2017.
Matt H
August 31st, 2017
We simply do not have the resources or reference materials to say for sure whether this is the proper replacement tank for your amp.
Answer this question
Asked by Anonymous on June 24th, 2018.
Matt H
June 25th, 2018
Unfortunately we do not have that tank.
Answer this question
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Product Reviews

5.00 out of 5 based on 1 reviews
Tim T - November 19th, 2022
5 out of 5

Worked perfect in an Ampeg Gemini 1!