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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
"Just because I don't care, doesn't mean I don't understand." - Homer Simpson
In fact, I would regard any amp that cannot be left on indefinitely as poorly designed - they should always reach a stable temperature and simply sit there being a room heater. There are some that can't though.
"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
"Just because I don't care, doesn't mean I don't understand." - Homer Simpson
"In fact, I would regard any amp that cannot be left on indefinitely as poorly designed - they should always reach a stable temperature and simply sit there being a room heater. There are some that can't though. "
Quite so. "We" once had an Artisan 30 combo sent back because the customer said the top panel* got too hot. I left it one all day and it stabilized to about 40C iirc. Now that is quite hot but won't injure you unless you have the skin of a one year old and hold it there for half a minute. I also pulled the chassis and checked all the volts and currents, well in specc'. We concluded that the punter was not used to "class A" 30 watt valve amps!
In another test a couple of years later a Stage 60 combo was "sealed up" wanted to know just how hot it would get. Surprised to find only about 5 degrees above its normal working temperature and perfectly safe. The theory was that 12" speaker cones are not good heat insulators!
Idea for the OP? Time switch and take more water with it!
ANOTHER reason for you to dislike them IC!
Dave.
BTW, this thread is about amps in UK? Don't forget they should still be safe where the ambient temperatures can reach 35C or more? Add as well that other lands have VERY much less control over mains voltage? Mexico was a problem.
Dave.
Having previously left Marshall DSL 401's & Laney TT 20's switched on (not on standby) for well over 24 hours (that's all I'm admitting to) I am pleased to report that... nothing happened.
At the time, I was 'otherwise engaged' cough, cough
I used to run a fairly big car audio system.
I had 2x Genesis dual mono's (made by a wizard of a bloke in southend) powering my 4 door speakers, and fuck me you could have fried an egg on them!
He used to make a monster of an amp, I forget its exact name but it wasnt cheap nor a common model!
Anyway when I visited his workshop one time he was telling me he'd often just power one up to keep the office warm in the winter months...
Though my Onkyo A/v receiver also gets bloody hot even on standby. Its lasted a good 8 years but damn, you can hold your hand on the grille for a hot minute but it isnt exactly comfortable!
Only by the audiophool, Russ Andrews brigade. Assuming a hi fi amp starts up at 20C there is absolutely no engineering reason why it should not perform to specification after at most a minute and for most designs and applications, two seconds.
The one minute window is to allow the bias to stabilize for class B output stage designs. One second is plenty for the ever increasingly used class D but another second will probably needed for the DC protection relay to clunk in.
Dave.
https://www.youtube.com/watch?v=1e4MrrDsWiQ
"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
"Just because I don't care, doesn't mean I don't understand." - Homer Simpson
View my feedback at www.thefretboard.co.uk/discussion/comment/1201922
I know solid states are different, but I realised yesterday morning that I’d left my Boss amp on since Thursday. It wasn’t even warm!