My guess would be one or all. Power switches build up carbon from arching and become resistive after decades. Electrolytic power supply capacitors, final stage driver transistors, new output transistors.
Amp showing its age?
Before getting into details, just the bottom line: can an SS amp, well into its second decade, begin raising its output impedance and/or dropping its peak current capability? Because mine certainly seemed to be doing one or both, so I have just replaced it, and now the speakers are again obedient.
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- 27 posts total
- 27 posts total