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Post by hcsunshine90 on Jun 17, 2014 11:23:24 GMT -5
yes, i'd say this question is truly deserving of this section of the forum. i heard one guy tell me that a solid state amp (once you turn it on) takes about seven to ten minutes for the biasing to take effect. he went on to say that there really is no reason to let your solid state amp warm up for more than five minutes before use. (ever since i heard this, i've been leaving them on for about ten minutes before i use them) so, what's the answer, should i let my UPA-1's "warm up a lil" before i use them?
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Deleted
Deleted Member
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Post by Deleted on Jun 17, 2014 11:34:42 GMT -5
It is strictly a personal preference. If you can hear a difference after a little warm up then follow the practice. If you don't hear a difference then no.
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geebo
Emo VIPs 
"Too bad that all the people who know how to run the country are driving taxicabs and cutting hair"
Posts: 24,197
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Post by geebo on Jun 17, 2014 11:49:05 GMT -5
I turn mine on and use 'em immediately. No warm up.
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KeithL
Administrator 
Posts: 9,958
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Post by KeithL on Jun 17, 2014 11:51:16 GMT -5
In general, the bias levels of solid state devices are related to their temperature. (The operating characteristics of transistors vary with temperature, and the bias circuitry controls things so it all stays within reason.) In short, the bias stabilizes when the temperature stabilizes. As you might imagine, how long this takes to happen, and at what temperature, depends on things like ventilation, and how loud you normally play things. Also, of course, different circuit designs act differently. So, if you really want to know how long it takes something to "fully warm up", just sit a good digital thermometer ON THE HEAT SINKS; when the temperature stops moving, the amp is "warmed up". (It's the output devices that make all the heat, so it is their heat sinks that are "of interest".) Also, obviously, since the temperature will depend on how loud you're playing things, and other stuff like air flow and even room temperature, there is no absolute "final number" here... the bias will be different at different operating temperatures and will move around a bit. In theory, the differences in bias might make a slight difference in sound, but most amps (including ours) are designed to minimize those differences.... I'm not going to suggest that you will or won't hear a difference but, IF you do hear a difference, it will be while the temperature is still changing. If you do hear differences in sound, once the temperature stops changing, the sound should also stop changing. yes, i'd say this question is truly deserving of this section of the forum. i heard one guy tell me that a solid state amp (once you turn it on) takes about seven to ten minutes for the biasing to take effect. he went on to say that there really is no reason to let your solid state amp warm up for more than five minutes before use. (ever since i heard this, i've been leaving them on for about ten minutes before i use them) so, what's the answer, should i let my UPA-1's "warm up a lil" before i use them? |
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Post by paintedklown on Jun 17, 2014 11:52:07 GMT -5
I turn mine on and use 'em immediately. No warm up. Same here. I am not sure if they sound any different when warmed up, so I just hit the power button and rock out.  |
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Post by monkumonku on Jun 17, 2014 12:06:04 GMT -5
The common sense answer is just listen and see what you think. If you hear a difference and it sounds better warmed up or there's no difference, then that's good. But hopefully it won't sound any worse when it is warmed up because that will mean you will have to keep turning it off and letting it cool down before you can listen again.  |
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novisnick
EmoPhile
CEO Secret Monoblock Society
Posts: 27,230 
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Post by novisnick on Jun 17, 2014 12:10:28 GMT -5
I turn mine on and use 'em immediately. No warm up. Same here. I am not sure if they sound any different when warmed up, so I just hit the power button and rock out. Correction, they do warm up as you use them, ya know,,,,,,,,,,,,he,,,,,he,,,,,, |
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Post by jefft51 on Jun 17, 2014 12:41:29 GMT -5
I usually start listening immediately when I turn on my system. Even if I could hear a slight difference after 10 min. of warmup, why would I listen to 10 min. of nothing? That's a lot more difference!
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Post by paintedklown on Jun 17, 2014 12:48:52 GMT -5
Same here. I am not sure if they sound any different when warmed up, so I just hit the power button and rock out. Correction, they do warm up as you use them, ya know,,,,,,,,,,,,he,,,,,he,,,,,, LOL! Yes, I am aware that amps warm up, I am not aware of weather or not I hear a difference.  |
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Post by monkumonku on Jun 17, 2014 12:51:33 GMT -5
I usually start listening immediately when I turn on my system. Even if I could hear a slight difference after 10 min. of warmup, why would I listen to 10 min. of nothing? That's a lot more difference! That's true. Just like when we wake up in the morning and our voices are sort of scratchy or congested until we warm up, you can pretend that Diana Krall just woke up in your living room so she has to warm up her vocal cords for a few minutes before she can sound her best. |
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Post by bitsandbytes on Jun 17, 2014 13:49:36 GMT -5
Warm up can take a various amount of time. I just start listening right away.
Before the warmup, I sometimes think in the beginning of the listening session how much better my system sounded the day before. Or after about 45 minutes (sometimes more or less) about how much better the system now sounds than when I first turned it on.
A B&M dealer near me likes to turn his best system with his Revel Ultima Salon 2's speakers and Parasound JC-1 amps on about two hours before having a customer listen to it. I not know why - after it was on for 15 minutes, it sounded heavenly to me.
I've waited before for the warm up to occur. For me, the waiting did not add to the musical experience since I was very anxious to just start listening. Like throwing scraps of meat to a starving lion lol. Each person is different though. I say try it out and find what works for you.
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Post by jefft51 on Jun 17, 2014 13:52:58 GMT -5
I usually start listening immediately when I turn on my system. Even if I could hear a slight difference after 10 min. of warmup, why would I listen to 10 min. of nothing? That's a lot more difference! That's true. Just like when we wake up in the morning and our voices are sort of scratchy or congested until we warm up, you can pretend that Diana Krall just woke up in your living room so she has to warm up her vocal cords for a few minutes before she can sound her best. If I was pretending, it wouldn't be my living room.... |
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