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"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
Doesn't seem to have hurt it and I've had it for years.
Many hi fi amps have a protection system that consists of a relay in the speaker circuit. This delays connection for a second or two and is often associated with a DC offset sensing circuit. Later, more sophisticated designs can have slow rampup PSUs.
No such niceties in the guitar world! (make and model of amp please? IC says I gotta ask!) but then guitar/bass speakers are much more rugged than hi fi cones.
Might be worth slapping a DMM across the speaker terms? If the offset is more than 10mV I would investigate it. Maplin USED to do a delay/protection device, will have a varder. If it bothers you a delay relay is easy to implement or you could just have a 5A swtich in the speaker circuit. http://www.velleman.co.uk/contents/en-uk/p240.html Maplin no longer do it seems.
Dave.
Almost all solid-state amps do it to some extent unless they have a suppression circuit (often relay operated, or in a power chip) because it's usually caused by DC offset as the supply rails power up unevenly, which they nearly always do.
Some valve amps do it by magnetic coupling between the PT and the OT, so it will still happen even if the standby is on.
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
Actually there are plenty of guitar / bass amps with output muting relays, although I agree it's not common.
Hi-fi punters are more fussy about extraneous pops I guess.
Makes me think "aaaannnnddd CONTACT!"
Time to melt faces, dawg!