Is the moscode 300 the Best $600 used amp?

hybrid amps such as the moscode have much in power but never that tube like sound many enjoy in pure breeds. To say its the best would determine placement with your own,. I would think that since you have a B&K pre why not go with an older B&K amp such as the 202 plus or 200 mono.

The Moscode 300 is one of the best $600 amps if you can find one that has not been modified to death. It does, in fact, have a warm powerful sound. I sold a Moscode 300 to a friend several years ago and he would not give it up for anything. He has used it with Quicksilver and Audio Research preamps driving electrostatic speakers.

If you're going that route,ensure you get complete disclosure from the seller regarding transformer hum.Common issue with 300's.

I have a B&K ST202 amp. Is the moscode an upgrade to my amp??

+++I have a B&K ST202 amp. Is the moscode an upgrade to my amp??+++

IMO, yes. A Moscode 600 replaced a B&K ST140 years ago. It was a step up, with some of the typical differences between tube and ss coming into play; eventhough the Moscode is essentially a ss amp (with a tube driver), and the BK was considered to be "tuby" sounding. The Moscode sound will actually be more "neutral" tonaly, but not as far as texture. The moscode will have larger, more rounded images, with more dimensionality. I found the B&K sound to be drier, but with a darker hue. This, of course, in my system. I hope those descriptions help in some way. Is it the best amp for $600 with the qualities you describe. IMO, no. A Conrad Johnson MV50 comes to mind. Or, if you can stretch the budget a little more (I hate when posters say that), for me, this is the one: http://www.audiogon.com/cgi-bin/cls.pl?ampstube&1297226361&/Dynaco-Mk-Iii-(Two)-Fabulous-new-build

Good luck.