Combo amp makes noise when turned off

[S-Bigbottom]

Why call/contact them, then wait (who knows how long, could be minutes, even hours), then potentially get ONE answer,
when you can post here first, get several different (and fun) answers (theories), 'almost instantly'?





I'm kidding. Relax. Just a little morning humor.



T$

It is the confirmation thump!

This is a good thing, because you can not always see the lights go out, and playing your bass until you no longer hear sound is annoying. Your set is done.

Hear that thump? Now you can safely unplug from the wall.

 

[Aloe]

some designs are prone to a click when powering on or off. my phil jones head pops on power on.

is it really that loud or your bass can sound louder through this amp? if the latter, nothing to worry about.

 

[JazznFunk]

My SWR Workingman's combos would make a 'pop' if you turned the power off before muting the speaker, as things 'shut down'. The manual said this was due to the design of the circuits - discharging capacitors perhaps? There's a 3 way rocker switch on the back that turns the speaker and horn on, or just the speaker sans horn on.... or all of it off if it's set in the middle position. I would always ensure it was off before powering down.

One of my Eden Nemesis amps has a very low volume 'thump' that happens a few seconds after it's powered off, as the lights on the front fade. There's no mute switch on the amp itself. Per my recording studio habits, I never turn anything off without 'zeroing out the board'. i.e., volume and gain are always turned completely off, and if I have a level control on the XLR out, I turn that all the way off too.

 

[KevInDaBassment]

New band name... 'The Screaming Tubes'.

I can see it now...
Band Leader: Hey everyone! We're "The Screaming Tubes" and we ALL use the same overdrive pedal!....Marshall Bluesbreaker!




Alright that's all I had to contribute, I'll see myself out

 

[Bonedoge]

is it really that loud or your bass can sound louder through this amp? if the latter, nothing to worry about.

The sound is way smaller than normal slap/pop sound so maybe I'll be fine. And I was doing some research with the schematics, and I think it actually don't have the relay that shutting off the signal to the cabinet. And of course same thing on power on, it almost immediately makes sound as soon as the amp turns on.

So maybe.. I don't know, but it might be okay. Thanks btw!

 

[JazznFunk]

I can see it now...
Band Leader: Hey everyone! We're "The Screaming Tubes" and we ALL use the same overdrive pedal!....Marshall Bluesbreaker!




Alright that's all I had to contribute, I'll see myself out

Even better.... 'Marshall's Screaming Tubes' or 'Marshall And The Screaming Tubes.' Sort of a 'Hootie & The Blowfish' or Pink Floyd deal where people think it's someone in the band's name.... but it isn't.

 

[logdrum]

Some techs can fix these issue with some sort of resistor + cap maybe . Locally, Rick Heinzelman did that to my SWR amp/ I wish he would still work on amps but he retired from it ( he also worked at Sandia National Labs ) But if it is not any louder when you smashed the string into the pickups, I won't worry about it. Maybe fake a cough while you turn it off

 

[5StringBlues]

I remember that strange electronic robot fart sound. A thump first, then "poowheEET".



Can't remember which amp tho.

 

[rodak]

I remember that strange electronic robot fart sound. A thump first, then "poowheEET".



Can't remember which amp tho.

The old Kustom tuck-n-roll amps would make an assertive "thump" at power on. I think it was considered a feature. I liked to go into the local music store and turn one on just to hear that.

 

[agedhorse]

Feature?