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What do you think of this preamp design?

I've been on the hunt for a preamp and came across the Audio-gd C3 final version:

http://www.audio-gd.com/Pro/pre/C3End/C3endEN.htm

It comes with schematic of the signal section. Does it seem to be well executed? Any obvious or subtle design flaws? It has had some positive reviews by owners on the web.
dracule1
atmasphere's avatar
atmasphere
11,957 posts
 
It looks overly complex... A very competent solid state line stage could easily be built with about 1/3 the components. The op-amp in the feedback loop looks to me like an outright design problem...

The ability to take a balanced or single-ended source is shared by all preamps with a differential input.
dracule1 OP
1,085 posts
 
Ralph, I saw that opamp in the feedback loop was puzzled because they claim they don't use any chip based opamps in their amps.
dracule1 OP
1,085 posts
 
BTW, I heard you're working on remote volume control for the MP3. When will it be ready? Did you see my thread on this forum about lack of a remote control being a deal breaker for preamps? More than I thought need remote.
atmasphere's avatar
atmasphere
11,957 posts
 
We are trying to have it ready for RMAF... at any rate, like the MP-1, the remote for the MP-3 will be retrofit to any earlier MP-3.
dracule1 OP
1,085 posts
 
That's great. Now only if you can put some RCA outputs on your MP3, I'll bite.
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