[Ralph Barone[_3_]]

Phil Allison wrote:
wrote:

-----------------

Having the power amp itself drive it
would be a feedback loop.


intentional feedback is very common in reverb systems
consider a tape delay reverb


** Different animals.

Feedback adds more echoes to a tape delay but would just make a reverb
tank howl at one note. It is never used.

.... Phil

Like any other feedback circuit, you just have to ensure that the loop gain
is less than one at all frequencies where the phase shift through the loop
is 0°. So just keep the loop gain less than one (ie: feedback is lower
level than the original signal) and it should all come out in the wash.

Not to say that I've seen this, but it shouldn't be difficult to achieve
with a spring reverb.