Air Tight ATM-1S $10,450 JM has been delighted to have this stereo tube amp in her reference system. No matter what style of music she played, no matter what speakers she paired it with, the ...

For such a big amplifier—and the Classic Stereo weighs in at 108 pounds—there isn’t much to it in the way of fancy doodads. Quite the contrary. A pair of XLR inputs on back, plus speaker ...