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Warming up your amp/receiver prior to use....
#374971 05/03/12 05:07 AM
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dakkon Offline OP
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I was wondering if any of you guys can hear a difference between when your amp/receiver is cold, as compared to when it is at its normal operating temperature?

I ask this due to a couple recent conversations that i have had.. Some of the people have asked if i let my amps warm up prior to listening... Well, i don't, and i don't hear a difference between when the amps are first turned on or when they have been on all day. I usually have my amps/audio equipment on for about 10 hours a day.. Durring the day i usually listen to classical while i am studying, i use the same gear to watch TV in the evening.

I think that this is one of those audiophile things.. One person said that they let their gear warm up for a hour before they do any listening....

Re: Warming up your amp/receiver prior to use....
dakkon #374973 05/03/12 05:51 AM
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for amp/AVR, I don't hear a different be it cold or warm up. However, I do see better colours and black level for my projector after like 10-15 mins running compared with startup.

Re: Warming up your amp/receiver prior to use....
dakkon #374976 05/03/12 07:27 AM
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Yeah, Alex; another of the seemingly endless variety of screwball audiophile mythologies. Capacitors form in a couple seconds after power-on and measurements are normal for listening. I've read claims that between an hour and several months of "warm-up" are necessary.


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Enjoy the music, not the equipment.


Re: Warming up your amp/receiver prior to use....
dakkon #374981 05/03/12 10:55 AM
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the only negative thing i've heard was a musician playing music full blast the instant he started his cold amp.
it's like putting the pedal-to-the-floor right after starting your car engine in -30 temperatures.
his amp got burned out output transistors within seconds because of internal stress.

Re: Warming up your amp/receiver prior to use....
dakkon #374984 05/03/12 11:06 AM
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I let my Jolida tube amp warm up about 5 minutes or so before using it, but I use mt Denon solid state receiver cold and I doubt that it would make a difference if let it warm up.

Re: Warming up your amp/receiver prior to use....
dakkon #374986 05/03/12 11:19 AM
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all tube equipment take about 45 mins to stabilize.
can anyone wait that long?

Re: Warming up your amp/receiver prior to use....
J. B. #374987 05/03/12 11:32 AM
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Originally Posted By: J. B.
all tube equipment take about 45 mins to stabilize.
can anyone wait that long?


I use a tube amp for some headphone listening and I don't let it warm up at all. At most it might be on for 1 minute prior. I can't tell any difference between 30 secs to 1 minute and the tubes going for 3 hours.


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Re: Warming up your amp/receiver prior to use....
dakkon #374992 05/03/12 11:54 AM
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i can add to my previous comment that this applies to precision instruments where they can measure very small variations, like color analyzers (in photolabs or for calibrating a display) where high precision is required.

this would not apply to audio tube amps.

Re: Warming up your amp/receiver prior to use....
dakkon #375012 05/03/12 03:12 PM
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Given that pretty well all recent AVRs/Pre-Pros/amps are never really off but, in a standby position anyway, I would think this "warm-up sounds better" philosophy is somewhat irrelevant.

Re: Warming up your amp/receiver prior to use....
J. B. #375020 05/03/12 04:11 PM
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dakkon Offline OP
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Originally Posted By: J. B.
i can add to my previous comment that this applies to precision instruments where they can measure very small variations, like color analyzers (in photolabs or for calibrating a display) where high precision is required.

this would not apply to audio tube amps.


This was the case when i was in the Navy.. If any of the precision equipment that we had was ever turned off, there was an extensive start up procedure.. But that equipment was sensitive to 1/2 or 1/4 volt deviations..

I think that there will be some temperature drift with the transistors in the solid state audio amps that we have, but i think that the drift is so small that it would be inaudible.

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