Pre Amp for Pass Labs X150.5

I use an Atma-Sphere MP-1 with Pass Labs XA-60.5 with excellent results.

I believe in general, you want to consider preamps with less than 200 omhs output impedance to match with Pass Labs if you're going to run single ended, and 600 ohms or less if you're going to run balanced.

i would go with a pbn audio amp

hi,

i see pass labs amp has two inout impedance, 30 kohm and 20 kohm. Which one refers to balanced? Thanks

30 kOhm is balanced.

20 kOhm is single ended.

Thanks for all replies. really appreciate it.

Anyone has any comments on the Jeff Rowland Capri? It fits my budget perfectly. Out impedance is also a good match: 80 ohms balanced & 40 ohms unbalanced.

Cheers