I have just sold mine, its actually rather good tho'.
I sold it because I am trying loads of step ups, and need the cash to fund my playing.
Its great midrange, has that ambience. Bass to thwacks, top end is a tad silvery, but that may be loading and matching.
You can use with any moving coil, its designed for the mc3000, but that's just really the gain, it has x30 or so, which is quite high, but you just control with the volume control. Possibly the loading makes a difference, but I have found it works very well with a few carts, provided they are not too high a generator resistance.
I can't do this in my head, but it presents a load of 47k divided by 900 to the cartridge. around 40 ohms, so look for a generator of 5 times less than that or less, say 8 ohms, you may still be able to use with 40 ohm carts, its a case of suck and see.
Its silver wired, with a nickel core, serious stuff, best tx i have yet heard.
i am currently playing with an altec mic transformer, which is slightly more laid back and easier to listen to, and acquits itself quite well compared to the £1000 ortofon.