Dennis and I are friends and members of the Houston Audio Society. I recently bought a M2 Series 1000S, which I'm using with a Cambridge Audio 840C source, a Parasound P3 preamp and various speakers. I've been comparing the D-Sonic to several amps I already own, including an 8 watt Sonic Frontiers 300B SET amp, an Ella amp using EL34 or KT88 tubes in triode mode, a pair of 40 watt Audio Mirror single ended parallel 6C33C monoblocks, and a 200w/ch Krell solid state integrated.
The sound of the D-Sonic is easily identified when compared to any of the tube amps, especially the SET amps, because it controls the bass so much better. This is true with a pair of 8 ohm 95dB sensitivity speakers, and even more so with a pair of 4 ohm Selah Audio Texas Revelator Towers. After listening to the D-Sonic for any length of time, and then switching to one of the tube amps, I find myself immediately wanting to reinsert the D-Sonic into the system. It's harder to tell the D-Sonic/Parasound combination from the Krell. The D-Sonic seems to have tighter bass control, and especially with the Selah TRT's Scan Speak Revelator Air Circ tweeters the treble seems to be a bit more resolved, but these differences are minor. The D-Sonic's feeling of great amounts of availabel power is about the same as the Krell, which is rated at 200w/ch into 8 ohms and 400 into 4 ohms, but this is only a feeling since I don't want to blow out any speakers and haven't driven either amp to clipping.
The Series 2 amps don't use IcePower modules. I don't know the brand that's used, but Dennis told me these modules, like the B&O IcePower modules, are engineered in Scandanavia and manufactured in China.