Watch out for impedance mismatch when pairing a CJ tube preamp with Pass. The CJ Act 2.2 did not do well at all with the Pass X250.5. I later inserted the Pass external cross-over (XVR-1), and it fixed the impedance issue (as well as split the signal to a sub) and sounded great, but without the impedance fix, it was not a pairing that worked.
