The TS/VV52 ST is, at $8,900, the least expensive of the several VV52B amps available from Mastersound. Weighing almost 100 pounds, this amp boasts a motorized remote control, 25 watts per channel of pure Class-A SET power, four switchable line-level inputs, and a "direct" mode that allows you to run it with a preamp, as a conventional power amplifier.