Checking out the photo in the previous post, I can tell you a bit more about the new DVA 4/2 design.
Each of the two large circuit boards support two independent Class AB power amplifiers with four Exicon double die 200V, 250W, 16 amp power mos-fets for each channel. Each circuit board also supports two active high voltage, high current regulators for the output transistors and separate high voltage, low current regulators for the small signal circuits. Extensive power supply decoupling circuits are also provided to provide for the absolutely stable ultra wide band performance capability of this design.
Each of the two audio circuit boards also include electronic switching circuits for changing the mode of operation from four discrete channel to two very high power channel operation.
The vertical circuit board to the right of the toroid power transformer contains the high current turn on relay and power supplies for mode switching and 12V trigger capability.
The amp is quiet, VERY high powered, and is the best sounding solid state amp we have ever done. Just what your system needs.