Posted by audioengr (M ) on December 27, 2004 at 10:14:14

In Reply to: Re: Parasound HCA 3500 Amplifier (SS) posted by john curl on December 26, 2004 at 14:29:58:

John - I really enjoy working on both of these amps. The main differences that I see that makes them sound different is:

1) circuit board partitioning between predriver and output stages is different in the two amps
2) Predriver power regulation is different

I believe that #2 accounts for most of the difference. After CES, I plan to redo the regulation on the JC-1 predriver board and see if that makes it sound more like the 3500. I will probably add low-voltage regulators, so it is double-regulated.

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