What do you think of this preamp design?

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.

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.

That's great. Now only if you can put some RCA outputs on your MP3, I'll bite.

Looks a bit like PS Audio's gain cells but more complex and less "empty" box.

Dracule1, you don't need RCA outputs on a preamp. What you need is XLR inputs on an amp. There is a way to do that such that both phases of the signal can be processed by the amp, without using a transformer and without changing the character of the amp.

If this sounds a little mysterious, its not- the technique is very simple. However, its not in common use in audio, which has always amazed me. I have a set of 45-based P-P amps at home that use a single-ended traditional driver circuit. Normally an amp like this would use only an RCA input, like a Dyna ST-70 or something like that. But I have been using this technique with this amp for several years, so it has an XLR input as well and the amp is processing both phases of the signal, even though the actual circuitry is the same as it was before.

This might be a matter for a different thread...