Pass amps with Tube pre-amps

I am doing this with a ARC Ref 3 pre and Pass XA160. The one thing I am a little concerned with is the impedance matching. The Pass amps have a lowish input impedance which may not be a good match for the high (relative to ss pres) output impedance of tube pres. I cant say I am disappointed with the results though I do have some concern and need to investigate this more.

I don't personally own a Pass amp but I did hear the x250 paired with a Hovland preamp and it sounded great

tried arc ref3, bat 51se, hovland hp 100. All worked well. (Theoretically, hovland has some impedance mismatch and it was single ended.) I prefered all these over the x1.

VTl would be great too

I have a Pass XA 350.5 with a Sonic Frontiers Line 3 and the combination works very nicely.

Due to the relatively low input impedance of Pass amplifiers, some tube preamps are not what might be considered, ideal matches.

Consult your preamp and Pass reps for specific information.

Good luck.

Disclaimer: Pass retailer