I just finished working on a PA-2400. Recapped it and replaced the carbon film resistors in the signal path with metal film. The amp was in good working condition prior to the work. The distortion I measure before and after are very similar. The spec quoted by H/K is:
When I measure 1kHz @ 1 Watt I get higher distortion:
When I measure at ~72Watts distortion numbers are better:
Do you think this is normal for a PA-2400? Does anyone happen to have one?
In general, what would cause the harmonics? The amp sounds great to me, and I don't want to go chasing a problem that isn't a problem.
When I measure 1kHz @ 1 Watt I get higher distortion:
When I measure at ~72Watts distortion numbers are better:
Do you think this is normal for a PA-2400? Does anyone happen to have one?
In general, what would cause the harmonics? The amp sounds great to me, and I don't want to go chasing a problem that isn't a problem.
