Tube preamp for Pass Labs amp

I have loved the hybrid tube kW linestage from Musical Fidelity with the Pass and FirstWatt gear I have paired it with. Check out the great Michael Fremer review in Stereophile. There are other nice reviews of this around the web too.

You could post your question here:

http://www.diyaudio.com/forums/pass-labs/

SAS Audio Labs 11A $2849-New, Great Preamp!

You got to be very careful. Input impedance of most Pass Lab amps is realtively low so most tube preamps will have poor match with them.

I can recommend therefore Joule-Electra LA-150 Mk2 used (but latest generation) or new or demo, call them. This preamp has two outputs: one with realtively high impedance and another with relatively low impedance so you can match it with all power amps.

I'll echo the other two posts for the Calypso. I'm using one now with my XA-30.5 with great results.