I had the same problems with a pair of Quest Zs. I run them with a Krell KAV250 amp & swapped An Adcom 565 for a Sonic Frontiers Line 1 & really noticed a positive improvement. I still would get a little too much top end brightness on some recordings so I replaced a Tara Labs Prime 1000 with a Cardas Quadlink 5c speaker cable & got a really nice sound.I have seen Line 1s advertised for around $1200 on this site. . The extra bucks are worth it because it is an excellent unit with a remote& easy connection to surround sound should you desire.
Tube Pre-amp beneficial?
Will a tube pre-amp "warm-up" my Martin Logan SL-3s if I am running a SS amp (Sunfire)? Or, do I need tubes throughout? I am currently using an Adcom GFP-565 in bypass mode, and I would like to upgrade the pre (staying under $1000) and add a remote, any recommendations from people with similar equipment would be appreciated.