Should the receiver get hot running unloaded?
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Joined: Jan 2006
Posts: 9
regular
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OP
regular
Joined: Jan 2006
Posts: 9 |
Hi;
I'm curious as how the receiver would behave when it is used just as preamp w/out any speakers connected directly to the receiver. Would it get as hot as it does in a normal setup where it is connected to speakers? Theorically, it shouldn't right? The only heat that should dissipate from unloaded run is leakage and the processor which shouldn't be much.
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Re: Should the receiver get hot running unloaded?
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Joined: Apr 2003
Posts: 16,441
shareholder in the making
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shareholder in the making
Joined: Apr 2003
Posts: 16,441 |
You are correct. The amps and associated power supply are the biggest heat generators in a receiver.
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Re: Should the receiver get hot running unloaded?
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Joined: Feb 2005
Posts: 5,211
axiomite
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axiomite
Joined: Feb 2005
Posts: 5,211 |
Theimage I've noticed that my H/K 635 runs warmer during two channel listening than does the Rotel amp that is connected via the H/K's preouts for two channel listening. Over on the Rotel site I've read where the Rotel 1098 processor runs very warm.
I was wondering your very same thoughts just a couple of days ago.
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Re: Should the receiver get hot running unloaded?
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Joined: Jan 2006
Posts: 9
regular
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OP
regular
Joined: Jan 2006
Posts: 9 |
The reason I asked is when I used my H/K435 purely as preamp, it seems warmer that I expected. I haven't tried to compare with running the receive by itself.
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Re: Should the receiver get hot running unloaded?
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Joined: Aug 2004
Posts: 6,379 Likes: 7
axiomite
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axiomite
Joined: Aug 2004
Posts: 6,379 Likes: 7 |
HK's seem to have higher idle currents in the power amplifiers than most receivers. This is good in the sense that it lowers distortion at low volumes, but bad in the sense that it idles hot...
M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39 M5HP, M40ti, Sierra-1 LFR1100 active, ADA1500-4 and -8
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Re: Should the receiver get hot running unloaded?
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Joined: Apr 2005
Posts: 1,155
connoisseur
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connoisseur
Joined: Apr 2005
Posts: 1,155 |
In theory, you are correct. If it isn't, I would start asking the question, WHY???? The amplifiers should not be generating more heat.
One possible exception is that the amplifiers may have some sort of "internal" load so that they never see an open circuit. However, I would not expect that "internal" load to generate much heat.
The Rat.
M80s, VP-150, QS8s,
SVS PC 20-39+, OPPO,
Onkyo 703s, Harmony 880
Sony 60" SXRD HDTV
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Re: Should the receiver get hot running unloaded?
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Joined: May 2002
Posts: 10,654
shareholder in the making
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shareholder in the making
Joined: May 2002
Posts: 10,654 |
Im, to illustrate the point that John B. made about power at idle, note the specs on your 435 which show 59 watts being consumed at idle(the same is true for Rick's 635). That's an awful lot of power coming in with none going out to the speakers, so it has to create significant heat.
-----------------------------------
Enjoy the music, not the equipment.
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