Audio Research Ref: CD8

Then why the bank of electrolytic capacitors next to the big tube?

Hello Tonywinsc , the electrolytic caps are needed to smooth the direct current after being alternate current to be changed by solid rectifiers .ARC always is famous by making very good powersections in their gear.Its the most important part of the design. You will notice there is no sign of humm in whatever gear of them.

I just sent my CD7 away for the upgrade. I think my player had the previous "lifeless" upgrade that was referred to above where a raised board was installed to hold the two 6H30 tubes. Perhaps a version 2 from the original. If this is the case, I cannot wait to hear the latest version and the associated improvements on an already great player. I will post my findings when it returns. Better sound and more reliable? Who could ask for more from a great company like Audio Research. I, for one, say continuous improvement is a good thing....

Mbudinich, my player has the same kit of yours. Did notice something too: I have days that the player sound great in other lifeless. Does the same happened with you?

Ossocao, I don't think I have experienced days where the cd player sounded better than others or any inconsistencies. Perhaps there is something else wrong with th player or elsewhere in the audio chain. Have you received your upgraded player? Has this corrected the issue?