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Old Amps and DC offset

When trying out an old amp, I check the DC offset with a multimeter before connecting the amp to speakers. It seems like a sensible precaution that may save a speaker one day.

Does it make sense to do this or do you need a load for the reading to be meaningful?

Most transistor amps I've checked measure much less than 50mV with or without a load but I just tried one that read 330mV on one channel (no load) and had 30A fuses substituted for the 3A fuses spec'd on the power feed to that channel.

My understanding is that under 50mV is OK and lower will sound better. Is this generally agreed upon?

As you get to higher DC offset readings, at what point should potential speaker damage become a concern.


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Topic - Old Amps and DC offset - energyandair 00:04:33 12/4/04 (2)


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