Preamp to pair with X250.5

Isn't the Pass balanced? IMO/IME you will want something with tubes that is also balanced.

The ability to drive long cables might also be nice. That is one of the reasons the balanced line system exists. That could allow you to place the front end where you want it rather than just between the speakers.

Have you considered the PASS XP-10?

-Karl

Nope... i actually looking for a tube preamp

Atmasphere,

Good input.... I was recommended CAT SL1... But it doesn't have balanced.. Any recommendations?

Well of course we make tube preamps that are balanced and we have been doing it longer than anyone else, having introduced the first balanced preamps made anywhere, back in 1989.

But if not our own the Calypso is one I would consider. Some of the newer ARC line stages are doing OK too, IMO starting with the Ref 3.