I've got an older (c. 1983) NAD 3150 integrated amplifier that I'm working on that has a slew of 1 uF electrolytic capacitors in the signal path (I've got a copy of the service manual with schematics). The NAD sounds a bit "grungy" to me compared to listening to the headphone output on my Echo Gina24. I've recently replaced the stock NE5532 with an LM4562, which has already helped improve fidelity somewhat.
I'm wondering if I might be able to clean up the sound a bit more by removing or replacing the interstage coupling capacitors.Would it be advantageous to remove some of them if there is sufficiently low DC offset present? Are there places where coupling capacitors are absolutely necessary and places where they can safely be removed? How much DC offset is acceptable before a coupling capacitor must be used?
Thanks!
I'm wondering if I might be able to clean up the sound a bit more by removing or replacing the interstage coupling capacitors.Would it be advantageous to remove some of them if there is sufficiently low DC offset present? Are there places where coupling capacitors are absolutely necessary and places where they can safely be removed? How much DC offset is acceptable before a coupling capacitor must be used?
Thanks!