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Since a couple of days I'm having an annoing reverbered hiss coming out of the amps. This happens with ALL my 3 amps (1 solid state and 2 tube).
I tried to change the cables, still no luck.
This noise sounds sometimes like a reverbered feedback.

When the amp is turned on with no guitar plugin it doesn't make any noise. It start hissing when an instrument (any instrument, guitars or bass) is plugged in.

It seems this problem affect all the audio equipment in the room, so I figuered out this is a wire/electricity issue.

Could it be a humidity problem? It has rained for two weeks here, and the old country house where I'm playing is quite cold.

I'm calling an electrician friend for check the wiring efficiency, but he doesn't have experiance with audio stuff.
Any help will be appriciated


detlef Fri, 01/02/2009 - 10:20

hi hueseph

No this isn't the regular hiss you can expect from a tube amp, it's way to high and sibylant, it's a continue SSSHHH.... like there was a ton of reverb turned on when there is none.
Sometimes it became a real feedback.

This happens in all the rooms served from the same electricity line.
I tested the amp at home and it works perfectly.

Yes the Fender Jazzmaster I'm using has 2 singlecoils, but this isn't a guitar issue, since I'm having the same problem with the bass on a different amp.

anonymous Sun, 01/04/2009 - 11:55

Have you tried taking your amp and guitar to someone else's house to see if you have the same problem there? If the same thing happens (hiss) at someone else's house you'd have to take a closer look at the guitar/amp/cable/batteries.

If you are playing close to a computer monitor you will get a noise - if you turn your guitar in certain directions the noise will get better or worse.

I also found that you can try to ground your guitar by wearing a wire around your wrist with the other end fastened to the bridge of the guitar - just to determine if it is a grounding problem - but a grounding problem isn't usually a hiss.

good luck,


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