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In Reply to: RE: Older ARC amps were a bit flaky posted by Ozzy on October 16, 2014 at 10:43:30
I would not recommend the Class D Audio 254 unless you have a tube preamp. I bought one used for $180 for my son. It sounds great for the money but is a little harsh on the high frequencies. We fixed the issue by paring it with a cheap Grant Fidelity tube pre/dac using an NOS 1960 non-A frame Telefunken 6DJ8 tube which really smoothed the top end out and makes the 254 sing. A higher end tube pre like an old syrupy Conrad Johnson preamp would be a perfect match for the amp.
Give some thought to an AVA Synergy amp.
Follow Ups:
Preamp is a Flemming Audio Labs custom made pre- phono stage is 3 12AX7s, line stage is 6N1P and a 12AX7 as a cathode follower. Nice and full sounding with NO harshness whatsoever.
Guess I should have added that in the O/P... On the other hand, my system is in Inmate Systems...
Cheers,
Dman
Analog Junkie
I ran a double blind A/B/X test using a H-K Citation II (McShane mods) and a Forte 4a (Soderburg mods) in my listening room with the help of friends. Both amps were tested for THD, noise and IM and found to be within spec, that is to say, below 0.1% thd and IM at the listening levels employed, and noise was at least 90 dB down from listening level. Quad ESL-57's were used as the speaker, source was a Cambridge Audio DAC MAGIC playing FLAC files made from Red Book CDs.
Levels of the amps were matched within 0.1 dB at mid band for the test.
Several people could identify the amplifier that was playing 90% of the time.
This result would not be possible if "all amps sound the same."
nt
Dman
Analog Junkie
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