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Post by Mr. Ben on Jul 3, 2009 10:29:22 GMT -5
If you're unfamiliar with the kill-a-watt, it's a little gadget you can plug into an outlet, then plug a device into it, and it will tell you how many watts, volts, etc the device uses. I thought I'd try plugging my amps into it.
The 200w x 7 channel MPS-2 uses 0 watts when off, 32 when asleep (trigger or signal-sense mode), and 49 watts when on but with no audio. Listening to 2-channel music with 90dB sensitivity 8ohm speakers brings the wattage into the 50-60 range, when listening at levels a bit higher than I usually do. 5 channel music brings it into the 55-70 watt range.
My Phase Linear amp (350w x 2) pulls 36w when silent, and 40-70w when listening at similar volumes on similar speakers.
My CD player uses 2w in standby, and 55w when playing. The RSP-2 uses 15w in standby, 20w when playing.
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Deleted
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Post by Deleted on Jul 3, 2009 17:14:20 GMT -5
post a pic?
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Post by beekermartin on Jul 3, 2009 18:48:29 GMT -5
If you're unfamiliar with the kill-a-watt, it's a little gadget you can plug into an outlet, then plug a device into it, and it will tell you how many watts, volts, etc the device uses. I thought I'd try plugging my amps into it. The 200w x 7 channel MPS-2 uses 0 watts when off, 32 when asleep (trigger or signal-sense mode), and 49 watts when on but with no audio. Listening to 2-channel music with 90dB sensitivity 8ohm speakers brings the wattage into the 50-60 range, when listening at levels a bit higher than I usually do. 5 channel music brings it into the 55-70 watt range. My Phase Linear amp (350w x 2) pulls 36w when silent, and 40-70w when listening at similar volumes on similar speakers. My CD player uses 2w in standby, and 55w when playing. The RSP-2 uses 15w in standby, 20w when playing. Very interesting. I would like to think my XPA-2 and XPA-5 aren't drawing over 30 watts each in standby mode. That's like leaving a 60watt bulb on 24 hours a day. I have a Kill-A-Watt meter. I am going to check when I have a chance. I really hope that isn't the case. If it is that is the highest standby power usage I have seen from any electronic device. |
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RPA-1 man
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Post by RPA-1 man on Jul 3, 2009 19:14:14 GMT -5
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Post by Mr. Ben on Jul 3, 2009 20:52:27 GMT -5
Yep - that's it. Thanks rpa1man.
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Post by red5ive on Jul 3, 2009 21:01:24 GMT -5
Very interesting. I would like to think my XPA-2 and XPA-5 aren't drawing over 30 watts each in standby mode. That's like leaving a 60watt bulb on 24 hours a day. I have a Kill-A-Watt meter. I am going to check when I have a chance. I really hope that isn't the case. If it is that is the highest standby power usage I have seen from any electronic device. I'd be interested to know the results, please. I have an XPA-2 + LPA-1, but I just pulled the trigger on an XPA-5 today to replace the LPA. I'd really be concerned if they draw 60W in standby. |
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Post by jedinite24 on Jul 3, 2009 22:29:31 GMT -5
Buy.com has the P3 International P4460 Kill A Watt for $29.99 with no extra shipping costs. J&R has the P4400 pictured above to $19.99 + shipping. Part of me is curious to see what my gear is drawing but then part of me says ignorance is bliss. JD
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Post by vincedog3 on Jul 3, 2009 23:03:02 GMT -5
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Post by Deleted on Jul 4, 2009 0:02:37 GMT -5
If it came in black with a blue readout, I'd buy it in a heartbeat. In white, no thanks! ;D
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Post by beekermartin on Jul 4, 2009 11:29:35 GMT -5
I just tested both my XPA-2 and XPA-5.
They both draw about 1 watt in standy mode. Standyby mode to me is when the main power switch on the back is on but the amp is off. Which means it is glowing yellow waiting to be turned on by either pressing the front power button or by trigger. I am using the triggers to turn the amps on.
With the amps on but no signal being fed to them, I turned them on manually by pushing the front power button, the XPA-2 draws @48 watts and the XPA-5 draws @75 watts. Again, that is with the power on, the amps are glowing blue and the leds are on, but no signal is being fed to them.
I am happy to report they are not drawing 30 watts in standby mode. Instead they are drawing next to nothing. Which is what they should be drawing.
I don't know why I got different results from the original poster. I checked both amps at least 5 times and my numbers were consistent. YMMV
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Post by red5ive on Jul 4, 2009 11:39:43 GMT -5
Thanks, beekermartin. I still plan on getting the kill-a-watt and try it out myself since I've been wanting one anyway, but I feel better now.
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Deleted
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Post by Deleted on Jul 4, 2009 15:57:49 GMT -5
How much is that one above? $25?
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Post by Mr. Ben on Jul 5, 2009 6:26:18 GMT -5
I just tested both my XPA-2 and XPA-5. I don't know why I got different results from the original poster. I checked both amps at least 5 times and my numbers were consistent. YMMV We have different amps. The MPS-2 is basically 7 independent amplifiers, and they must collectively add up. |
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RPA-1 man
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Post by RPA-1 man on Jul 5, 2009 9:03:52 GMT -5
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Post by beekermartin on Jul 5, 2009 12:42:20 GMT -5
I just tested both my XPA-2 and XPA-5. I don't know why I got different results from the original poster. I checked both amps at least 5 times and my numbers were consistent. YMMV We have different amps. The MPS-2 is basically 7 independent amplifiers, and they must collectively add up. I understand that but I still don't think your MPS should be drawing that much power in standby mode. You got similar power ratings as I did with the amp on but not receiving a signal. I don't know why the MPS draws so much power in standby mode. Maybe Dann or Lonnie will chime in here. |
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Post by Mr. Ben on Jul 5, 2009 14:32:15 GMT -5
We have different amps. The MPS-2 is basically 7 independent amplifiers, and they must collectively add up. I understand that but I still don't think your MPS should be drawing that much power in standby mode. You got similar power ratings as I did with the amp on but not receiving a signal. I don't know why the MPS draws so much power in standby mode. Maybe Dann or Lonnie will chime in here. Yeah, it seems like a lot. It makes a bit of a buzzing noise in standby too, which is another reason I keep it off when not in use. |
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Post by flamingeye on Jul 5, 2009 15:49:51 GMT -5
I would think if your getting a buzzing sound then your getting a typ of signal/DC current or something and that would case the increased power consumption ,but I`m just guessing here
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Post by Mike Ronesia on Jul 6, 2009 3:40:03 GMT -5
I just tested both my XPA-2 and XPA-5. They both draw about 1 watt in standy mode. Standyby mode to me is when the main power switch on the back is on but the amp is off. Which means it is glowing yellow waiting to be turned on by either pressing the front power button or by trigger. I am using the triggers to turn the amps on. With the amps on but no signal being fed to them, I turned them on manually by pushing the front power button, the XPA-2 draws @48 watts and the XPA-5 draws @75 watts. Again, that is with the power on, the amps are glowing blue and the leds are on, but no signal is being fed to them. I am happy to report they are not drawing 30 watts in standby mode. Instead they are drawing next to nothing. Which is what they should be drawing. I don't know why I got different results from the original poster. I checked both amps at least 5 times and my numbers were consistent. YMMV What readings do you get under load? |
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Post by beekermartin on Jul 6, 2009 11:50:02 GMT -5
I didn't check the wattage when under load.
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Post by beekermartin on Jul 6, 2009 11:51:19 GMT -5
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