Hi Curley- I'm not a "tube" guy, but I can tell you I like the sound better on my ReQuests when I switched from the 4B to the 7Bs. Not sure why, but it made a difference. I have a Parasound pre-amp. Good luck
Martin Logan ReQuests and Mesa Baron
Are there any ML ReQuest owners out there that are using tube gear. I have a BAT VK5i/Bryston 4BST combo. Want to try the Mesa Baron (Tubes). Cables are Nordost SPM. Looking at trying to smooth out the slightly Edgy top end. I think my problem is the Bryston although it gives damm good bottom end. Appreciate some good advice on this and balance.