Doc Luke
I have a Musical Fidelity X10V3 here which I used on the output of my unmodified Denon 2200 for a while. I also gave it a try between my amp and preamp. While it does do some fairly nice things in the face of an otherwise harsh source, I don't think it measures up to the performance of my modded Sony in either of those configurations. It does give some nice, even desireable roll off and the impression of added air and texture. I found though that when using it after the preamp, LPs would tend to sound dark and compressed compared with keeping the X10 out of the circuit. In that configuration, it strikes me as a somewhat high priced, and mostly high performance, equalizer rather than a way of truely transforming the front end into a tube component. Some may find it amusing to know that I'm currently using it on the output of a Kenwood component receiver for Sirius Satellite Radio where it nicely rounds off the digital edges of that service. It makes for great background music when I'm working.
Peter