Uploaded July 2018 | Updated September 2026, 1 week ago

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In today's video, we're doing an audio comparison of the 3 reverb tank brands you're most likely to come across among current production tanks: MOD®, Belton, and Accutronics®. The tanks are model 4AB3C1B, which are long-tank, 2-spring, long decay reverb tanks.

You can view our follow-up Spring Reverb Tank Comparison video which compares 2-spring and 3-spring tanks here:
youtube.com/watch?v=Wg8hBVHEAqo

MOD® 4AB3C1B:
amplifiedparts.com/node/3293

Belton 4AB3C1B:
amplifiedparts.com/node/3283

Accutronics 4AB3C1B:
amplifiedparts.com/node/3273

For a full listing of the reverb tanks we have for sale, including MOD®, Belton, and Accutronics® tanks, visit:
amplifiedparts.com/taxonomy/term/260

Looking to add some spring reverb to your sound? Try "The Wave" - a DIY tube-driven spring reverb unit from MOD® Kits:
amplifiedparts.com/node/10806

If you're wondering what "4AB3C1B" means, visit our tech corner article on Accutronics' reverb tank specifications. This will give you a run-down on the different types of reverb tanks and explain what each digit/letter in a model name like 4AB3C1B means:
amplifiedparts.com/node/40073

For a more in-depth look at spring reverb tanks, including how their reverb effect is achieved and their surrounding circuitry in popular amplifiers, see our tech corner article "Spring Reverb Tanks Explained and Compared":
amplifiedparts.com/node/40089