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Just curious, in your opinion; how much of a sound difference is there over a restored to factory specs amp? The power supply capacitors make sense, but is it worth the several hundred dollars to change the control board, backplane and power transistors? Using a Concept receiver as a preamp...

Thank you all, My game plan is to start with the power supply capacitors and buss ; I have read that is a point of failure. The previous owner did have the caps changed but only with the same rating as factory. The unit plays extremely well, dead quiet with no hum. It brings out the best in my...

I am in the Winston-Salem area

My 400 Series II is being delivered today via FedEx; just joined this forum and started reading many of the posts. I am looking forward to tapping the vast wealth of knowledge here.