from whatI am gathering there is 2 amplifiers. One for each channel sort of like mono blocks all in one chassis. That is the way a true balanced amplifier would work. One amplifier for each channel. This is supposed to be a fully balanced design. The amp does indeed sound good.
Actually, I'm pretty sure that there are 4 amplifiers, 2 for each channel. For one channel in a balanced system, a pair of amplifiers work together in split phase. During the positive going phase of the signal, the first amp drives the + line positive while the other amp drives the - line negative. During the negative going phase of the signal, the first amp drives the + line negative while the other amp drives the - line positive. This is how a balanced configuration can double the slew rate of a single ended one since the + and - lines are moving away or toward each other twice as fast than if one were anchored to ground (single ended). This is why some mono-block amplifiers on the market can be reconfigured to run in a standard stereo mode by separating the two internal amplifiers into independently operating single ended amps.
Again, I'd like to see some schematics of this thing.