Removing the power switch "pop"

[mckayprod]

My Fender Champion 110 pops when I shut off the power switch.  I find the same problem, but louder, in the Frontman 15R we use as a bench amp in the guitar shop I work at.  I think the amps are pretty similar, so I think the same fix should work on both.  SO...what's the fix?  We used to cut switching noise by adding a cap across the contacts but I don't remember the value of the cap and I'm not sure the problem is the same (this was a remote switch for a broadcast turntable which was generating a spike that the preamp picked up).

Seems like this symptom is common with solid state amps.

Thanks for the ideas.

[Jazz P Bass]

To find out if it is a swiching problem, unplug the amp from the outlet with the amp on.

If it then does not pop, you could try adding a capacitor across the switch legs.

[Enzo]

A lot of amps pop at turn off.  I do not consider it a problem.

[mckayprod]

I never worried about it either, until I was testing a 2X12 cabinet the other day with two speakers that had some serious bass response (Fane A60s).  That pop was loud, and I feared for the drivers.  Maybe just an annoyance, but better equipment is quieter, no?  I'll try the power lead trick and see where that leads me.

[Enzo]

They can be loud, but keep in mind the pop won;t be any louder than the amp can get with signal.