Jtsnead,
I'm glad you're enjoying your new D-Sonic M3-800 amps. I've noticed there are very few reports from people regretting buying D-Sonic amps, whether stereo, multi- channel or monos. Everybody seems very satisfied with these amps.
Sebollo001/Sebastian,
You preferring the D-Sonic M3-600-M-A amps over such well respected amps like the McIntosh C601 monos, says a lot about the quality of the D-Sonics. I'm glad you're enjoying them and hope I enjoy my soon to arrive M3-600-M amps as much.
I'm a bit surprised, and concerned, that you think the Oppo 105 may not perform well in the mid to high frequencies.
I've been using JRiver on my laptop to wirelessly stream ripped cd and FLAC 96khz/24bit files from a Synology NAS to my Oppo 105. The Oppo acts as the Media Renderer/ Media Player with the digital signals converted by its built in Saber dac.
The Oppo's rather low 100 ohm output impedance is a good match with my Class D Audio 440CS amp's specified input impedance of greater than 57k ohms. This system performs very well from top to bottom; solid and textured bass with a smooth but detailed midrange and treble. It may be that my current system's very good impedance matching is a big contributor to its excellent performance.
The D-Sonic M3-600-M amps, having no custom input stage raising the input impedance, therefore have the same input impedance as the ALC-1000-1300 amp modules themselves, which is listed as a rather low 9-13k ohms. This isn't a really bad match since the Oppo's impedance is so low at 100, but it's not as good a match as it is with my current 440CS amp.
So, the big question is, does this less than ideal Oppo-to-D-Sonic amp impedance matching result in the poor midrange-treble performance that Sebastien noted with this combo? I sure hope not but I'll report back after I have the amps in my system for awhile.
Sebastian,
I know your Benchmark Dac2 has an adjustable output impedance feature. Did you need to lower the output impedance setting to achieve your very good mid-treble performance? If so, could you let me know your output impedance setting?
Worst case, if I notice subpar midrange and treble performance, I believe there are devices you can insert between the preamp/source and amp to better match impedances. I'll start researching these just in case.
Later,
Tim