5 out of 5
Mod Electronics P-RMOD-4AB3C1B Reverb Tank - MOD®, 4AB3C1B, Long Decay, 2-Spring
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Product Description
Manufacturer Part Number: P-RMOD-4AB3C1B
Compatible amps include tube reverbs from 1963-1990 such as the Princeton Reverb, Vibrolux Reverb, Deluxe Reverb, Super Reverb, Pro Reverb, Twin Reverb, Quad Reverb, Super Six Reverb, Vibrosonic Reverb. This also includes all reissue equivalents. Also includes Fender® '63 Reissue Reverb Unit, Fender® Concert II, Mesa Boogie® MK2C plus other models, LAB® Series L5, L7, L9, Koch® Powertone I, B-52® AT-100. Also compatible with some speaker-driven, type F, vintage Ampeg® amps such as B12X, B12XY, Echo Jet, Echo Twin.
The MOD® Reverb Tanks are high quality upgrade units. Some of the major differences between the MOD®s and other reverb tanks are that the Transducers are wired directly to their respective RCA jacks as opposed to current production tanks where Transducers are connected by a detachable plug to their respective RCA jacks. This makes the tanks less receptive to any outside interference. The original Hammond Accutronics tanks from the 1960s were also wired directly to their respective RCA jacks. In addition, very close attention has been paid to the spacing and size of the lamination of the Transducers resulting in a more vintage like tone.
Questions about reverb tanks? See our tech articles for more information.
Measurements and Specs
Files
Compatible amps include tube reverbs from 1963-1990 such as the Princeton Reverb, Vibrolux Reverb, Deluxe Reverb, Super Reverb, Pro Reverb, Twin Reverb, Quad Reverb, Super Six Reverb, Vibrosonic Reverb. This also includes all reissue equivalents. Also includes Fender® '63 Reissue Reverb Unit, Fender® Concert II, Mesa Boogie® MK2C plus other models, LAB® Series L5, L7, L9, Koch® Powertone I, B-52® AT-100. Also compatible with some speaker-driven, type F, vintage Ampeg® amps such as B12X, B12XY, Echo Jet, Echo Twin.
The MOD® Reverb Tanks are high quality upgrade units. Some of the major differences between the MOD®s and other reverb tanks are that the Transducers are wired directly to their respective RCA jacks as opposed to current production tanks where Transducers are connected by a detachable plug to their respective RCA jacks. This makes the tanks less receptive to any outside interference. The original Hammond Accutronics tanks from the 1960s were also wired directly to their respective RCA jacks. In addition, very close attention has been paid to the spacing and size of the lamination of the Transducers resulting in a more vintage like tone.
Questions about reverb tanks? See our tech articles for more information.
Measurements and Specs
| Connectors | input insulated, output grounded | |
| Decay Time | long (2.75 to 4.0 s) | |
| Grommet Hole Diameter | 0.2 in. | |
| Input Impedance | 8 Ω | |
| Item Height | 1.5 in. | |
| Item Length | 16.75 in. | |
| Item Width | 4.25 in. | |
| Mounting Hole Center to Center A | 8.75 in. | |
| Mounting Hole Center to Center B | 3.75 in. | |
| Mounting Plane | horizontal, open side down | |
| Output Impedance (Zout) | 2.25 kΩ | |
| Springs | 2 | |
| Thickness | 0.04 in. |
| Packaging Dimensions | 17 in. × 5 in. × 3 in. | |
| Weight (Packaging) | 1.75 lbs. |
Files
| Sound Sample - Drum Machine Clap | All Models |
| Sound Sample - Drum Machine Snare | All Models |
| Sound Sample - Quick Strum | All Models |
| Sound Sample - Stacatto | All Models |
| Sound Sample - Sustained Chord | All Models |
| Sound Sample - Tremolo Chords | All Models |
Attention CA Residents: Prop 65 Warning
WARNING:
This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.
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Our staff are available to answer any questions you may have about this item
Customer Reviews
By William Huffman
Date: December 24, 2024
Replaced a bad reverb tank in a Fender 112 plus amplifier. This was a direct placement and took about 5 minutes to complete. I was impressed with the sound and functionality of this reverb tank and I’m very happy I bought it. Brought the amp back to life and sounds great!
Rating: 
[5 of 5 Stars!]
[5 of 5 Stars!]
By Bippity Boppitty
Date: November 18, 2024
1982 Peavey Backstage 20 - old pan faded away amp; died. Got this one which replaced the old 4EB2C1B perfectly. Was concerned that footprint might be smaller - or - 2 springs vs 3, but can confirm: works great, plenty of splash on tap, and very useable range with full rotation of knob. Total winner, would recommend.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Chris Spiridigliozzi
Date: September 04, 2024
perfect easy fit for 90s blues jr. very responsive. Great deal
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By R Grayson
Date: August 30, 2024
I used this to replace a broken reverb on Peavy Blazer. I followed a YouTube video to modify it properly to connect to the amp, and it works nicely. It's very good for the price. This may be an issue with the Peavy, but the reverb only seems to work between 6 and 10 on the dial. The sound is full and pleasant, with a traditional spring reverb sound, and the decay can go pretty long, with the mix creating some big atmospheric tones.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Michael Yankovich
Date: February 18, 2024
Easy to install, works perfectly!
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By The Woj
Date: January 23, 2024
Works great, just swapped right in for old, rusted tank. Connect, screw down and you are all set. Great value for the money. No need to spend more.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]