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Warming up

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Meat View Drop Down
Old Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Meat Quote  Post ReplyReply Direct Link To This Post Topic: Warming up
    Posted: 08 October 2012 at 6:43pm
Some time ago various people posted about how running their (heavy) amplifiers for some time gave a better sound. Now that large numbers of us have fancy switchmodes has anyone noticed a similar effect with these amps and their lower thermal inertia?
Don't test the champignon sound
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Old Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 08 October 2012 at 7:15pm
imho if a solid state amp needs to warm up before it sounds its best, its faulty
Kevin

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Post Options Post Options   Thanks (0) Thanks(0)   Quote darkmatter Quote  Post ReplyReply Direct Link To This Post Posted: 08 October 2012 at 8:10pm
I've heard of hifi aficionados saying they never turn their toroidals off for this reason, mini radiators and nothing more in my (to be fair unqualified) opinion.

In my opinion if a circuit hasn't reached stability within the first minute of playing at reasonable load there's something inherently wrong with it.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 08 October 2012 at 9:43pm
It's possible for a faulty amp to exhibit this sort of thing. On older amps, worn out electrolytics can regain some performance when warm. Some amps may be running with too little bias and hence distortion that disappears when the amp is warm enough. Really an amp should perform perfectly straight out of the box   
Kevin

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Post Options Post Options   Thanks (0) Thanks(0)   Quote opus jody Quote  Post ReplyReply Direct Link To This Post Posted: 09 October 2012 at 8:59am
All my amps must be faulty then!!
they definitely sound better after about an hour.
in fact, in very cold (sub zero) start up conditions, they can sometimes sound so distorted that it sounds like all the cones are blown. It's only the fact that all cones do the same sound that tells you it's the amps.
With a minimum of 15 mins on tickover before any serious volumes, there's never any problems.
It behaves much like a diesel engine to be honest. a bit of warm up time goes a long way.
You wouldn't expect a car to do 0-60 in 10 seconds on a cold engine.
once they're up to temperature you can spank them really hard for days with no issues.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smoore Quote  Post ReplyReply Direct Link To This Post Posted: 09 October 2012 at 9:55am
I have noticed this as well especially doing outdoor parties. Im guessing, like you say, its because of the cold...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dub Specialist Quote  Post ReplyReply Direct Link To This Post Posted: 09 October 2012 at 11:20am
you could put this in the conspiracy theories Big smile
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mrspeedy Quote  Post ReplyReply Direct Link To This Post Posted: 09 October 2012 at 12:30pm
To be honest, my diesel van performs alot better when cold actually...
Even runs better if the air is cool with low humidity (i.e winter)!
Never noticed any distortion on my amps when outdoors in a marquee in sub 15deg temperatures. 


Edited by mrspeedy - 09 October 2012 at 12:34pm
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GEB View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote GEB Quote  Post ReplyReply Direct Link To This Post Posted: 09 October 2012 at 12:42pm
KY jelly is better once it's warmed up.......ooops, wrong forum!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mooreb Quote  Post ReplyReply Direct Link To This Post Posted: 09 October 2012 at 12:50pm
Originally posted by mrspeedy mrspeedy wrote:

To be honest, my diesel van performs alot better when cold actually...
Even runs better if the air is cool with low humidity (i.e winter)!
Never noticed any distortion on my amps when outdoors in a marquee in sub 15deg temperatures. 
 
My Range was like that, Turned out to be diesel injectors and oil rings, Be careful!!!
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mooreb Quote  Post ReplyReply Direct Link To This Post Posted: 09 October 2012 at 12:53pm
Originally posted by kedwardsleisure kedwardsleisure wrote:

It's possible for a faulty amp to exhibit this sort of thing. On older amps, worn out electrolytics can regain some performance when warm. Some amps may be running with too little bias and hence distortion that disappears when the amp is warm enough. Really an amp should perform perfectly straight out of the box   
 
I agree with the older amps, I turned some on the other day that I had not played for a while and waited for a while before sending any signal through them just so the caps could be nice and charged (kind of like warming up a car when you get in in i suppose!)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mykey- Quote  Post ReplyReply Direct Link To This Post Posted: 09 October 2012 at 12:59pm
Originally posted by Dub Specialist Dub Specialist wrote:

you could put this in the conspiracy theories Big smile
LOL. Same as our bodies. I jog and road bike, I always have to warm up first lol
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