I have a B-2101 that seems to have a slightly lower level of output on the left channel; not drastic but noticeable. Is there a way to measure output level at he speaker terminals using a multimeter? ...or do I need an O-scope to do this?

Use a digital multimeter (DMM) with a true RMS scale. Put the machine in MONO.

Fred

Probably will need to use a test tone too - maybe 1kHz would work good. IMO, the reading will be too variable if you try to use music to see the measurement.

Right, use a sine-wave test tone and measure AC volts.

using tone on the i/p measure the o/p using a true rms meter.square the resultant measurement and divide it by the o/p impedance you are using.This will give power o/p in watts.I think with 400hz i/p an ordinary meter measuring ac will give a reasonable result as well,at least for comparing the 2 channels

using tone on the i/p measure the o/p using a true rms meter.square the resultant measurement and divide it by the o/p impedance you are using.This will give power o/p in watts.I think with 400hz i/p an ordinary meter measuring ac will give a reasonable result as well,at least for comparing the 2 channels

Right! I use a resistive dummy load of the proper impedance to save my speakers and ears. :yes:

Tom

Yes Tom I neglected to mention that I normally connect to a resistive load as well.300 watts a 400 hz is very uncomfortable to listen to!!