C34V Monitor Amp DC offset

[jlovda]

I measure 23mv offset on both channels. This comes to about 66mw for 8 ohms. Is this within the normal range? Awhile back one channel had a 2.5v offset and I burned out two speakers because I put both speakers on that channel trying to figure out where the distortion was coming from. They got repaired. I changed both differential input transistors with correct parts on the bad channel and corrected the problem.

Thanks

 

[eiraved]

16mV - 50mV: An acceptable value, especially at the lower end of this range. 2nd harmonic distortion is probably twice to four times what manufacturer's spec calls for at higher frequencies. Probably not audible, as the distortion is mostly in the upper octaves. At the upper end of this range I begin to raise an eyebrow. :saywhat:

I'd say you're in the acceptable range of DC offset.

Thread 'Amplifier Distortion, DC-Offset, and You!'

Mar 19, 2003

Time for one of those long, boring semi-technical posts that no one here reads...

As a few of you know, I bought a rare Kenwood 700M amplifier a few weeks ago on eBay. It arrived with a weak channel which was taken care of by replacing a bypass cap. Since then, I have gone through the entire amp and replaced all the electrolytic capacitors with the exception of the big power supply caps (not that expensive...maybe $20 in caps).

The previous owner described the amp as 'perfect' sounding, and compared with the big Mac's and Krell's and such. Before buying it, he described his current...

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[jlovda]

Thanks. Is this a generic number for direct coupled power amps or a Mcintosh number?

 

[eiraved]

Thanks. Is this a generic number for direct coupled power amps or a Mcintosh number?

It's not a number derived by McIntosh if that's what you mean, but I suppose you could consider it a generic number for direct coupled amps.