Dan,
After six years, I can provide you some feedback. It should not have issue when combo with MC302. I got a rare chance to purchase a set of NOS Constellation and Hercules three weeks ago, and I love these preamp and amp.
*Great quality for the price, which is very cheap for such quality IMO.
*Very low gain, and the sound quality is great.
*Remote is handy.
*For tubes, you can use 6SN7GT, 6SN7GTA, 6SN7GTB, and "ECC33".
*There is no other types of input/output, and there is only RCA connectors. (that's how Cary keeps the cost down)
Wes
