The DSP is actually very quiet - but the fact that in-car you use power amps means that even the slightest noise on the outputs can be audible, which means the install has to be good. The empeg, having a fast CPU, DRAM, etc in the box also has other noise sources, which is why we use differential outputs to remove digital noise.

The Mk2 has a redesigned PSU section, but the same audio output circuitry (basically) and we've managed to improve the performance plus go back to "normal" (non-differential) output, though it can be converted for differential if needed.

Hugo