Ohm Walsh Micro Talls: who's actually heard 'em?

At D-Sonic website under the Product tab, the input impedance for the 600W and 1500W output M2 series are listed as 60Kohm. But I e-mailed Mr. Deacon last month asking him what is the input impedance of the M2-1200S and M2-3000S stereo amp. He replied 10Kohm. So I'm not sure, but 10Kohm should be fine for all solid state active preamps and most tube preamps.

TObe,

10K ohm input impedance may be fine for many tube pre-amps, but I would just note that there are some Class D amps designed to work well with any pre-amp, inlcuding tube, like Wyred4Sound and Bel Canto, that introduce 60Kohm or higher input impedance for that purpose for best results in all cases. 10K may sound fine but could be more hit or miss for best results in terms of dynamics and low distortion IMHO. The reason is that most impedance ratings including those for pre-amp outputs are nominal for all frequencies but actual impedance varies significantly by frequency, so my opinion is that a high amp input impedance is a good insurance policy in order to be safe.

BTW, I considered the older D-Sonic Icepower based amps at the time but ended up going with Bel Canto for significantly more cost. THe 10K input impedance rating of those older D-Sonics plus no special robust design for the Power supply to the IcePower module used were the main reasons. I use an ARC sp16 tube pre-amp. Who knows, maybe it would have worked out fine, butI have not regretted going the way I did. THe newer D-Sonics have more appeal for me, especially assuming the higher powered ones have 40K input impedance or higher. That is what I recall reading for Pascal Class D amp modules on the Pascal site, but not certain. Pascal amps also appeared to be stronger out of the box in terms of power supply, current delivery capabilities, and overall switching amp specs compared to older Icepower. Assuming those are what is used, I would expect the product to sound VERY good, at least if they live up to the specs on paper. Were I in the market for another amp today, the D-Sonics would be a much stronger contender than 2-3 years a go or so.

First question for me is what Class D amp modules D-Sonic uses now. Most of what I have read has been speculation

Reading info on Pascal site again, Pascal may not be the most impressive Class D amp out there on paper compared to other newcomers I have seen mentioned as possibilities for D-Sonics, especially for some tube or other higher output impedance pre-amps, but for the price are still certainly worth consideration in any case.

You are right but Wyred 4 Sound and other manufacturers include a buffer stage ahead of the Class D amp for the simple reasoning of increasing the input impedance, making it an easier match for tube preamps. I personally would prefer not to have the extra circuitry dressing and go all natural.