Reverb Tanks
Spring reverb tanks are used to create a unique reverberation effect in guitar amps and organs. The reverberation effect is created when an audio signal created by a transducer is sent through one or more springs, the movement of the springs is then converted back into an audio signal by another transducer at the other end, creating the unique sound. Not sure which tank you're looking for or what a 4AB3C1B is? Check out our spring reverb calculator to help you determine what these tank designations mean!

Accutronics
Accutronics reverb tanks were originally manufactured as a division of Hammond Organ, and became popular in the guitar industry through their inclusion in the famous Fender Twin Reverb. In 2009, Accutronics reverb was sold to Belton who now makes Accutronics reverb tanks as Accu-Bell Sound Inc.
Fender
Fender® - Founded in Fullerton California by Leo Fender, Fender Musical Instruments Corp is the world's foremost manufacturer of guitars, basses, amplifiers and related equipment dating back to the 1940's.
Long (3 Spring) tank, long decay, 10Ω in / 2,575Ω out. Input insulated/output grounded connectors. Horizontal/open side down mounting. Counter wound spring, coupled and placed in parallel, combine to create a full, rich reverb effect.
$26.95

Long (3 Spring) tank, long decay, 800Ω in / 2,575Ω out. Input insulated/output grounded connectors. Horizontal/open side down mounting.
$26.95

Long (2 Spring) tank, long decay, 8Ω in / 2,250Ω out. Input insulated/output grounded connectors. Horizontal/open side down mounting. Counter wound and coupled springs deliver superior mechanical performance and classic sound.
$24.95

Long (2 Spring) tank, long decay, 600Ω in / 2,250Ω out. Input insulated/output grounded connectors. Horizontal/open side down mounting. Counter-wound and coupled springs deliver superior mechanical performance and classic sound.
$24.95

Long (2 Spring) tank, long decay, 8Ω in / 2,250Ω out. Input insulated/output grounded connectors. Vertical/connectors up mounting. Compatible amps include Fender® stand alone reverb and original ’63 Reverb. Also used in Marshall™, and Ampeg™ amps.
$23.95

Long (2 Spring) tank, long decay, 8Ω in / 2,250Ω out. Input insulated/output grounded connectors. Horizontal/open side up mounting.
$23.95

Short (3 Spring) tank, long decay, 10Ω in / 2,575Ω out. Input insulated/output grounded connectors. Horizontal/open side down mounting.
$22.95

Accutronics mini-size spring reverb tank. 2-spring, 150Ω input impedance, 1500Ω output impedance. 4.88" x 1.73" mounting centers. Available in medium or long decay.
$9.00

Accutronics mini-size spring reverb tank. Long decay, 2-spring, 600Ω input impedance, 1500Ω output impedance. 4.88" x 1.73" mounting centers.
$9.00