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Old 5th March 2006, 11:56 PM   #1
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Default amp speaker output voltage

I have a PPI PC2150 it seems to work fine but when using a test cd there's a 2.4V difference in output at the speaker terminals between left and right. I have another just like it and the diff is less than 1V. I adjusted both to put out 34V @1khz-0db bridged and when I looked at the gains they were in exactly the same spot on both amps. What is the normal variation in 2-channel amps using a single gain? All testing was done at the same volume position using a Clarion deck and i also tried switching the RCA's around to be sure the input voltage was the same and got the same results.
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Old 6th March 2006, 12:03 AM   #2
Eva is offline Eva  Spain
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This may seem a bit misleading, but tolerance is usually +-5% for resistors and +-3dB for potentiometers.

Note that +-3dB is approx +-30% error between channels.
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Old 7th March 2006, 07:25 AM   #3
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So a 30% variation in voltage is possible? When i hooked the amp up to a pair of speakers and played some music I could not hear any any difference in volume from either side. Any ideas on how I can narrow the difference? thanks
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