Reverb Tanks FAQ

Written by
Steve Snyder
Published on
August 2, 2021 9:01:33 AM PDT August 2, 2021 9:01:33 AM PDTnd, August 2, 2021 9:01:33 AM PDT

What do the alphanumeric reverb tank names mean?

DIGIT #1 - REVERB TYPE

8 = short tank, three springs

4 = long tank, two springs

9 = long tank, three springs


DIGIT #2 - INPUT IMPEDANCE

A = 8 Ohm

B = 150 Ohm

C = 200 Ohm

D = 250 Ohm

E = 600 Ohm

F = 1475 Ohm


DIGIT #3 - OUTPUT IMPEDANCE

A = 500 Ohm

B = 2250 Ohm

C = 10000 Ohm


DIGIT #4 - DECAY TIME

1 = Short (1.2 to 2.0 sec)

2 = Medium (1.75 to 3.0 sec)

3 = Long (2.75 to 4.0 sec)


DIGIT #5 - CONNECTORS

A = Input Grounded / Output Grounded

B = Input Grounded / Output Insulated

C = Input Insulated / Output Grounded

D = Input Insulated / Output Insulated

E = No Outer Channel


DIGIT #6 - LOCKING DEVICES

1 = No Lock


DIGIT #7 - MOUNTING PLANE

A = Horizontal Open Side Up

B = Horizontal Open Side Down

C = Vertical Connectors Up

D = Vertical Connectors Down

E = On End Input Up

F = On End Output Up



How do I know which reverb tank I need?

The best way to find out what reverb tank fits your amp, is to locate the manufacturer number stamped on the top or side. This may require you to remove the tank.


Locate the 7-digit alphanumeric code on your tank; e.g., 4AB3C1B. Once you have this code, simply browse our reverb tank selection until you find a match.