Pre-amp match for Moscode 600

Your amp probably has a high (>50k ohms) input impedance; my tube amps do. I'm going to be a contrarian and suggest you run a passive or SS preamp with your tube amp. I'd start with the Adcom 750. As a rule you find this a synergistic and quiet pairing.

I was using a an Audio research LS-2 with my modified Moscode 600. I then tried a Birdland Odeon Lite D/A converter with a volume control and it was an amazing improvement.

I have a fancy VAC preamp with my Stephen Sank-upgraded Moscode 600. It sounds sublime.

I would recommend looking into a used VAC Standard preamp; they come up from time to time on Audiogon.

Meanwhile, if you're interested in getting the most out of your Moscode, I'd get in touch with Stephen Sank and find out about the range of options he offers. Unlike others who work on Moscodes, Stephen does nothing significant to the original circuit design; he just upgrades everything with very high quality components. My amp came back sounding utterly transformed for the better; much *much* better in fact. He's at http://www.stephensank.com/

Sank can do good work, but I would not let him tie my shoe! Want details, do a search under Sank, my comments are here to be found.

V/R,

Lou

Lou,

I went and read your comments about your Stephen Sank experience, which were quite different from my own.
I sent him my amp, having spoken to him a few times about what I wanted. He did the work and sent it back. As it happens, there was a problem when I got it back. I can't remember what it was, but what I do remember is that I sent the amp back to him, he fixed it, he *lowered his price* to compensate me for the aggravation and extra shipping costs and time, and added another upgraded part that I had originally decided to forego.

So, I think of him as someone who went as far as one can go in the service world to stand by his work and reputation.

Of course, your mileage did vary. But that's what happened to me.