I got an X-DAC to use with an old Arcam Alpha 5 I had ben running for years. It helped. A bit. But when I decided to look at a further upgrade I was easily able to better the combination with a used Jadis Symphonia which I am happily using now without an outboard DAC. It completely blew away the X-DAC, which had me questioning in retrospect just how much of an improvement on the plain old unmodded Alpha 5 it had been; and also made me healthily sceptical of MF hype!! Still, I flogged the X-DAC on for a decent price, and the experience cured me of the dodgy yen for multi-box digi sources the denizens of this place are so keen on, for which Deo Gratia!! ...You pays yer money and you takes yer choice!