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

I'd check the input impedance spec of the newer D-Sonic amps.

The older ones were stock Icepower, 10K ohm input impedance, not a great match for most higher output impedance pre-amps, like most tube pre-amps. DOn't know about Placette specifically.

Newer D-Sonics use Pascal Class D modules I believe and I recall reading these have 40K or so input impedance, which is much better for use with high output impedance pre-amps.

I would confirm the D-Sonic output impedance specs though in that I am not 100% certain about specs of the newer D-Sonics.

ALso if anyone is interacting with D-Sonic to buy, if you can ask them to confirm what Class D modules their newer amps use, I would really like to know for sure. Pascal Class D modules have been inferred elsewhere where I have read but not confirmed. I'm not sure the specs I see published on D-sonic site match Pascal or not. THat does not mean that those modules are not used and tweaked in some ways by D-Sonic, though I recall in the past D-Sonic seemed to merely put stock Icepower modules in a box with no apparent electronic mods. Not sure what D-Sonics expertise is to be able to do electronic tweaks as opposed to merely packaging amp modules from other sources.

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.