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RE: I'm 95% convinced I want to change to a passive preamp. Thoughts?

I see you did some 'mods' to the Rotel.

1. Start with evaluating that you did them properly and you used the correct Sparkos etc.

2. Cold solder joints, and IC sockets with corrosion will give problems. Also look for 'solder blobs' overlooked before, even tiny ones.

3. power supply caps? could be

4. Look for cap puffiness on the top of each cap everywhere


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