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Post by leonski on Feb 5, 2016 1:02:45 GMT -5
Has anyone measured the power used by the XPA-1 when at idle?
I would like to know the idle power with the A/A-B switch in both positions.
I'd expect a big bump in idle power as well as a substantial warming of the amp as a result.
The best way to make this measurement would be to use a Kill-A-Watt meter which retails in the 20$ range.
That's part of MY kit, but not the Amp in question!
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Post by garbulky on Feb 5, 2016 1:07:16 GMT -5
Has anyone measured the power used by the XPA-1 when at idle? I would like to know the idle power with the A/A-B switch in both positions. I'd expect a big bump in idle power as well as a substantial warming of the amp as a result. The best way to make this measurement would be to use a Kill-A-Watt meter which retails in the 20$ range. That's part of MY kit, but not the Amp in question! I don't know what my XPA-1 gen 2 consumes at idle in class A mode. But it puts out enough heat on idle to make it painful for my hand to be on it for more than a short while. So it's substantial. |
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Post by leonski on Feb 5, 2016 2:18:11 GMT -5
And that's a 70lb amp, too!
What part gets hot? Over the heat sinks or nearer the center, which is mostly power supply?
Sounds like a fine amp for a cold climate.
Also, does the amp change character from stone cold to fully warm?
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Post by qdtjni on Feb 5, 2016 5:02:59 GMT -5
I measured mine in Class A mode, they were around 310-320 W each.
It was more or less stable like that even when playing so loud that my ears hurt.
It get's up to temp fairly quick so whatever difference there is between sound when cold vs. warm, is just there for a few minutes.
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Post by ocezam on Feb 5, 2016 8:23:36 GMT -5
I measured mine in Class A mode, they were around 310-320 W each. It was more or less stable like that even when playing so loud that my ears hurt. It get's up to temp fairly quick so whatever difference there is between sound when cold vs. warm, is just there for a few minutes. I believe the OP is asking how much the amp USES, not produces. I remember when I had my XPA-1L, the difference between class A and class AB was about 3 amps at idle. And yeah, it was VERY warm on class A. |
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Post by qdtjni on Feb 5, 2016 8:57:31 GMT -5
Why do you think I was talking about output instead of consumption?
After all, 310-320W output in Class A for a an amp specified to output 60W or so in Class A would be extremely unlikely....
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Post by qdtjni on Feb 5, 2016 9:34:57 GMT -5
I reconnected my XPA-1 G2 pair to my PS Audio Power Plant P5.
Idle power consumption in Class A/B mode: 75W each
Idle power consumption in Class A mode: 310W each once warmed up.
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Post by qdtjni on Feb 5, 2016 11:31:52 GMT -5
I've had the amps on playing Music from an Squeezebox Touch via USB in on my XMC-1 at -20 dB with loudness on and DIRAC on for some hour or so.
Still in Class A mode, the power consumption is now down at some 255W per XPA-1 G2.
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Post by jackpine on Feb 5, 2016 11:57:03 GMT -5
I measured mine in Class A mode, they were around 310-320 W each. It was more or less stable like that even when playing so loud that my ears hurt. It get's up to temp fairly quick so whatever difference there is between sound when cold vs. warm, is just there for a few minutes. I believe the OP is asking how much the amp USES, not produces. I remember when I had my XPA-1L, the difference between class A and class AB was about 3 amps at idle. And yeah, it was VERY warm on class A. 3A X 110V = 330W |
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Post by leonski on Feb 5, 2016 19:58:05 GMT -5
Yes, how much the amp USES. For an 'A' amp or one Switchable, like the XPA-!, I'm curious power used in BOTH switch positions.
Also, with EACH amp idling @300 watts (give or take) and on for 5 hours per day (TV and Music Duty) I'm guessing a REAL dent in the Electric Bill.
That's 600 watts per hour for 5 hours is 3KwH and for 30 days turns into 90KwH. OUCH!
When I exceed baseline allowance, my bill SKYROCKETS pretty quickly. I would easily go to the 450Kwh+ monthly range. Easy.
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Post by ocezam on Feb 6, 2016 8:59:29 GMT -5
Why do you think I was talking about output instead of consumption? After all, 310-320W output in Class A for a an amp specified to output 60W or so in Class A would be extremely unlikely.... I thought output because I simply didn't do the math. Sorry. |
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Post by leonski on Feb 12, 2016 17:20:29 GMT -5
In this age of trying to save energy / reduce costs, 'd' amps make sense when coupled with a SMPS.
I just replaced a kitchen INCANDESCENT bulb with a 100 screw in fluorescent which is rated at 23 watts. Puts out a BUNCH more light and saves power.
New appliances use lots less power than those 15 years and more which they replace.
And STILL my bill RISES.
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