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32 mV DC: defective or acceptable?
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Posted on March 15, 2017 at 23:38:49 | ||
Posts: 559
Joined: September 21, 2001 |
I picked up a new Onkyo M5010 stereo power amp from Best Buy ($250 plus state sales tax)? One channel has 15 mV and the other channel has 32 mV DC at the output. The source has DC blocking capacitor at the output. So the DC output is the power amp's offset. Is 32 mV acceptable level of DC output on a hi-fi amp(well, that model is not really hi-fi)? I have seen some hi-fi amp's catalogue specs such as DC less than 10 mV (Quad, Creek, BGW, etc.). In the case of a Parasound Halo amp, the manual claims 0.00V meaning that DC offset at the output is less than 5mV. |
100mV, posted on March 17, 2017 at 13:54:30 | |
Posts: 6135
Joined: June 17, 2000 |
There is no DC adjust. If the DC exceeded 100mV I would consider replacing the diff input pair for that channel. |
same without load. nt, posted on March 16, 2017 at 16:02:39 | |
Posts: 559
Joined: September 21, 2001 |
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Is that with no load? nt, posted on March 16, 2017 at 08:29:05 | |
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Location: Minnesota Joined: April 24, 2002 |
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with speaker connected. nt, posted on March 16, 2017 at 08:35:46 | |
Posts: 559
Joined: September 21, 2001 |
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That might be about a 1/10th of a milliwatt. I wouldn't worry about it. nt, posted on March 16, 2017 at 09:12:56 | |
Posts: 4769
Location: Minnesota Joined: April 24, 2002 |
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