Slinky reverbs et al

Grant Richter grichter at
Fri Mar 31 21:16:45 CEST 2000

Craig Andertons innovation in the PAIA "Hot Springs"
kit is to run two identical springs differentially so the
"sproings" cancel and the audio doesn't. Quite clever.
That's probably a lot more important than any other

Reverb springs are very sensitive to
magnetic pickup and aluminum chassis don't shield for magnetics.
A steel chassis around the springs is a good idea.

The springs I have around here seem to have input
impedance's between 10 and 25 ohm. These are intended
for solid state drive using essentially a headphone amp
circuit. The 4 inch springs sound like crap. The 18 inch
springs sound A LOT better.

> From: Barry L Klein <Barry.L.Klein at>
> To: Barry.L.Klein at
> Cc: synth-diy at
> Subject: RE: Re: Slinky reverbs et al
> Date: Friday, March 31, 2000 11:44 AM
> New question:
> Reverb tanks are available in all kinds of sizes and input/output
> impedances - intended for transistor/tube/op amp drive circuits.  Have
> of you experienced any differences in the sound with different drive
> circuits/input impedances?  Any reason not to go with op amp drive and
> higher impedance drive coils?
> Barry

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