Bryston 4B-ST, Magnepan 1.6QR, suggest a preamp.

A lot of people at the Maggie Users Group are using the Foreplay tube pre. It's a DIY project that's supposed to be easy. There are ones for sale here that are already assembled.

Dave43, I own the 4Bst and have mated it with four different preamps and three of them have been tube based preamps. I find that tubes are a much better compliment with the Bryston. I had a Rogue Magnum 99 that was bought new and found the sound to close to solid state and not to my liking. I then bought a Cary Slp98 and after a capacitor upgrade, this unit is down right fantastic. Its reviewed in this months Stereophile.....keep your options opened.

Dave43 the Cary also has a additional output that can be used for a sub.

Was using an ARC LS2B for nearly a year with a Bryston 14BST and briefly with a 4BST with superb results. Recently replaced the LS2B with a ARC SP16 with phono stage and wow I think I am just discovering what soundstaging, image and space between instruments is all or nearly all about. Heartly recommend the combo of Bryston and ARC SP 16.Great value for money with two of the most respected names in high end audio.

I'm using an ARC LS-16 with a 4B-ST to drive Acoustats and it's a great combination.