Kclone - I assume you mean original US-made Tung Sol 6550s, which run fine in ARC power supplies. I also think they sound better there than current Russian tubes do. The original Tung Sol puts out a bit less power than a 6550A or 6550C (35 watts as opposed to 42, I believe), but I don't think there is much question that they were the best sounding 6550's ever made.
Audio Research Ref 5 preamp
Hi,
I currently own the ARC Ref 3. I know its early, but I was wondering if anyone has had the opportunity to do a comparison of the new ARC Ref 5 compared to the ARC Ref 3 and if so, what are the sonic differences that you heard. Any input would be helpful. Thanks
I currently own the ARC Ref 3. I know its early, but I was wondering if anyone has had the opportunity to do a comparison of the new ARC Ref 5 compared to the ARC Ref 3 and if so, what are the sonic differences that you heard. Any input would be helpful. Thanks