Uploaded August 2018 | Updated September 2026, 1 week ago

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Today's video is part 3 of our series on spring reverb tanks. The previous two videos were a comparison between MOD®, Belton, and Accutronics, and a 2-spring vs. 3-spring comparison. Today, we're comparing short, medium, and long decay tanks using MOD® tanks. The tanks used in this video are the MOD® 4AB1C1B (short decay), 4AB2C1B (medium decay), and 4AB3C1B (long decay). They are all 2-spring, long-body tanks.

Spring Reverb Tank Comparison Part 1: MOD®, Belton, Accutronics®
youtube.com/watch?v=c1IIiv89Qoc

Spring Reverb Tank Comparison Part 2: 2-Spring vs. 3-Spring
youtube.com/watch?v=Wg8hBVHEAqo

MOD® 4AB1C1B
amplifiedparts.com/node/10111

MOD® 4AB2C1B
amplifiedparts.com/node/41451

MOD® 4AB3C1B
amplifiedparts.com/node/3293

View all of our spring reverb tank listings:
amplifiedparts.com/taxonomy/term/260

Looking to add some spring reverb to your sound? Try the MOD® Kits "The Wave" - a DIY tube-driven spring reverb unit.
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 on 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