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!
Reverb Tank - Accutronics, 1BB2D1B, Medium Decay, 2-Spring
Short (2 Spring) tank, medium decay, 150Ω in / 2,250Ω out. Input insulated/output insulated connectors. Horizontal/open side down mounting. A small low cost two spring unit designed for application when price is a major factor. Ideally suited for practice amps.
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Reverb Tank - MOD®, 8BB3C1B, Long Decay, 3-Spring
Short (3 Spring) tank, long decay, 190Ω in / 2,575Ω out. Input insulated/output grounded connectors. Horizontal/open side down mounting. MOD® Reverb Tanks are high quality upgrade units. Compatible amps include Fender Harvard Reverb II and Yale Reverb amps (short tank).
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Reverb Module - Accutronics Belton, Digi-Log, horizontal, mini
A great digital reverb sound that easily replaces a spring reverberation unit. Small package is half the size of the P-RBTDR-1H-X
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Reverb Tank - MOD®, 4FB3A1B, Long Decay, 2-Spring
Long (2 Spring) tank, long decay, 1,475Ω in / 2,250Ω out. Input grounded/output grounded connectors. Horizontal/open side down mounting. MOD® Reverb Tanks are high quality upgrade units. Compatible amps include Ampeg® amps (some models), Epiphone® EA-28RVT, Gibson® GA19RVT and GA20RVT, Music Man® RP and RD series, plus others .
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Reverb Tank - Accutronics, 8AB2B1B, Medium Decay, 3-Spring
Short (3 Spring) tank, medium decay, 10Ω in / 2,575Ω out. Input grounded/output insulated connectors. Horizontal/open side down mounting.
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Reverb Tank - Accutronics, 4EB3C1B, Long Decay, 2-Spring
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.
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DSP Module - Accutronics, 99 Effects (Reverb, Chorus, Delay, +)
The BTSE-99FX Effect board provides 99 different digital audio effects to be used in many audio applications that require sound enhancement. Equipped with a superb quality digital effects processing engine which adds that extra punch needed to make sounds truly stand out. Applications:
  • Guitar/ Keyboard/Bass amplifiers and combos
  • Audio mixing consoles / Powered mixing consoles
  • Stand -alone stereo effect units for studio and PA usage
  • Effects pedals
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Reverb Tank - MOD®, 8FB3C1B, Long Decay, 3-Spring
Short (3 Spring) tank, long decay, 1,925Ω in / 2,575Ω out. Input insulated/output grounded connectors. Horizontal/open side down mounting. MOD® Reverb Tanks are high quality upgrade units.
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Reverb Tank - MOD®, 8AB2A1B, Medium Decay, 3-Spring
Short (3 Spring) tank, medium decay, 10Ω in / 2,575Ω out. Input grounded/output grounded connectors. Horizontal/open side down mounting. MOD® Reverb Tanks are high quality upgrade units. Compatible amps include select Fender® and Mesa Boogie® models, Reverend® Hellhound(early), Goblin, and Kingsnake, PRS® SE-20, plus others .
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Reverb Module - Accutronics Belton, Digi-Log, Adjustable Decay
A great digital reverb sound that easily replaces a spring reverberation unit. Stereo outputs may be summed for mono operation. Simple interface: input, output, +5V, and ground
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Reverb Tank - Accutronics, 8AB2D1A, Medium Decay, 3-Spring
Short (3 Spring) tank, medium decay, 10Ω in / 2,575Ω out. Input insulated/output insulated connectors. Horizontal/open side up mounting. Designed for applications in which the overall sound quality is important and a compact package is required.
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Reverb Tank - MOD®, 4AB2C1B, Medium Decay, 2-Spring
Long (2 Spring) tank, medium decay, 8Ω in / 2,250Ω out. Input insulated/output grounded connectors. Horizontal/open side down mounting. MOD® Reverb Tanks are high quality upgrade units.
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Reverb Tank - MOD®, 8BB2C1A, Medium Decay, 3-Spring
Short (3 Spring) tank, medium decay, 190Ω in / 2,575Ω out. Input insulated/output grounded connectors. Horizontal/open side up mounting. MOD® Reverb Tanks are high quality upgrade units. Compatible amps include Crate® BV120H Blue Voodoo, select Epiphone® and Gibson® models, plus others .
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Reverb Tank - MOD®, 8BB3D1B, Long Decay, 3-Spring
Short (3 Spring) tank, long decay, 190Ω in / 2,575Ω out. Input insulated/output insulated connectors. Horizontal/open side down mounting. MOD® Reverb Tanks are high quality upgrade units. Compatible amps include select Rivera® amplifier models, plus others .
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Reverb Tank Bag - 17" Long, Handmade Black Tolex
Reverb tank bags give the reverb tank better isolation which results is fuller, richer reverb.
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Reverb Tank - Accutronics, 8DB2C1C, Medium Decay, 3-Spring
Short (3 Spring) tank, medium decay, 310Ω in / 2,575Ω out. Input insulated/output grounded connectors. Vertical/connectors up mounting. Designed for applications in which the overall sound quality is important and a compact package is required.
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Reverb Tank - Tube Amp Doctor, 4BB3C1B, Long Decay, 2-Spring
  • Replaces: 4BB3C1B
  • 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: Horizontal/open side down


Compatible amps include Fender® Blues Deluxe (original version), Blues Deville (original version), London Reverb, Studio Lead, Harvard Reverb II, Showman 115 (80’s version), Rivera™ Rake, Jake Studio Combo, and Fandango models, Laney™ VC30, Crate™ V-32 Palomino.
"TAD redefines Spring Reverberation. When the manufacturing of Accutronics Reverb cans in the USA has been announced to close down in 2008 TAD started the research for an own high quality production of the classic spring reverberation units. The goal was to create a drop-in replacement bringing back that stunning reverb sound that Fender made so popular since the early 1960s.
The TAD Reverb Cans achieve this goal and even more: deep and smooth reverb, no fluttering but wide frequency response with airy top end instantly inspiring to enjoy guitar playing. The rock solid mechanical design assures a very dependable and consistent quality performance exceeding any expectation. A drop-in replacement and upgrade as well for vintage as for modern reverb cans by size, performance and tone."
-Tube Amp Doctor
Questions about reverb tanks? See our tech articles for more information.
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Reverb Tank - Accutronics, AMC2BF, 2-Spring
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.
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Reverb Tank - MOD®, 8AB1A1B, Short Decay, 3-Spring
Short (3 Spring) tank, short decay, 10Ω in / 2,575Ω out. Input grounded/output grounded connectors. Horizontal/open side down mounting. MOD® Reverb Tanks are high quality upgrade units.
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Reverb Tank - MOD®, 8EB2C1B, Medium Decay, 3-Spring
Short (3 Spring) tank, medium decay, 800Ω in / 2,575Ω out. Input insulated/output grounded connectors. Horizontal/open side down mounting. MOD® Reverb Tanks are high quality upgrade units. Compatible amps include Fender® Blues Jr., Deluxe 90, Princeton 65, Stage Series, Acoustasonic Junior, Vaporizer, Ultimate Chorus, Ultra Chorus, Sidekick Keyboard 60, Sidekick Reverb 35, Super 60, Super 112, Frontman 65R, Eighty-Five, Tech 21® Trademark 30, Epiphone® Valve Junior Hot Rod, Vox® AC15CC, AC15C, Ultra 60/120, Backstage, Valveking, plus others .
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Reverb Tank - Accutronics, 9AB2C1B, Medium Decay, 3-Spring
Long (3 Spring) tank, medium 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.
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Reverb Tank - Tube Amp Doctor, 8AB3C1B, Long Decay, 3-Spring
  • Replaces: 8AB3C1B
  • Solid, sturdy construction
  • Type: Short (3 Spring) tank
  • Decay: long decay
  • Input: 10 Ω
  • Output: 2,575 Ω
  • Connectors: Input insulated/output grounded
  • Locking: No lock
  • Mounting: Horizontal/open side down


"TAD redefines Spring Reverberation. When the manufacturing of Accutronics Reverb cans in the USA has been announced to close down in 2008 TAD started the research for an own high quality production of the classic spring reverberation units. The goal was to create a drop-in replacement bringing back that stunning reverb sound that Fender made so popular since the early 1960s.
The TAD Reverb Cans achieve this goal and even more: deep and smooth reverb, no fluttering but wide frequency response with airy top end instantly inspiring to enjoy guitar playing. The rock solid mechanical design assures a very dependable and consistent quality performance exceeding any expectation. A drop-in replacement and upgrade as well for vintage as for modern reverb cans by size, performance and tone."
-Tube Amp Doctor
Questions about reverb tanks? See our tech articles for more information.
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Reverb Tank - Accutronics, 9EB3C1B, Long Decay, 3-Spring
Long (3 Spring) tank, long decay, 800Ω in / 2,575Ω out. Input insulated/output grounded connectors. Horizontal/open side down mounting.
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Reverb Tank - MOD®, 4FB3A1A, Long Decay, 2-Spring
Long (2 Spring) tank, long decay, 1,475Ω in / 2,250Ω out. Input grounded/output grounded connectors. Horizontal/open side up mounting. MOD® Reverb Tanks are high quality upgrade units.
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