Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: johnfromcyrene on June 11, 2026, 11:53:51 am
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has anyone made a panoverb?
not sure how they got the reverb in one speaker.
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Two amps? I has "stereo function for tremelo and reverb" so would that seems like that's the case.
--Pete
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not sure how they got the reverb in one speaker.
Some of the early "guitar amps with reverb" did not mix the with-reverb signal with the Dry signal, but instead sent it to its own power-amp & speaker.
- Sano (https://www.vintageguitar.com/17184/excelsior-americana/)
- Ampeg (https://www.ggjaguar.com/et-2-b.htm)
- Hammond AO-35 and AO-44 reverb amplifiers
These are "foldback reverb" designs, where the speaker-output of the main (dry) amp drives the reverb tank (http://1.bp.blogspot.com/-Ap00oYhq574/UWjhY-jjEGI/AAAAAAAACTA/bNS_3lIZ5S4/s1600/ExcelsiorSchematic.JPG), which is then amplified with its own power section & separate speaker.
In the case of the Hammond units, you could "add reverb to any organ" by connecting wires from the existing organ-speaker to the new unit's input jacks, and connecting its output to a dedicated speaker.
Fender tells you (https://www.fender.com/products/jack-white-pano-verb) more or less that this is what they're doing:
... a unique speaker configuration of a 10-inch Jensen P10R and a 15-inch Jensen C15N. These speakers are driven by independent 20- and 50-watt power sections, resulting in an enveloping 70-watt wash of stereo sound. Next, the Pano Verb’s true spring reverb splash can be routed to both speakers or just the 10-inch ...
So the 2x6V6 "20w power section" is driving the 10" speaker, and the 2x6L6 "50w power section" is driving the 15" speaker.
Reverb is always connected to the 6V6 power section, but can also be connected to the 6L6 power section for "both speaker" use.
So the Panoverb is different, in that the Reverb must come from a shared preamp-section, but then can be sent to one or both output sections.
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it seems like this amp has features to make it a stereo type amp. but usually you would just run two amps anyways so the stereo functions would seem to be a little redundant.
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Yes, I have twice built stereo amps inspired by the Pano. It's two amps in one cabinet. One has tremolo and the other has reverb. The sound is awesome! I did it once as a combo, and then again as a piggy back.
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is that how the magnatone stereo is done as well? they always put 2 amps in there