Pass Labs:What to expect fm XA60.5 to XA100.5

Has anyone tried either the XA60.5 or the XA100.5 with the Vandersteen 5A? I'm wondering if either Pass amp has enough power for medium sized room and moderate listening levels (@10 ft).

Nicks,

I use a pair of XA-100.5s with my Vandy 5As in a 14 by 24ft room. The meters on the XA-100.5s rarely move (leaving class A) unless I am playing fairly loud (above average 90dB) or listening to something with quite a bit of dynamic range (symphonic music) -- in either case on peaks above 98-100dB. My listening position is about 12-14 feet back from the plane of the speaker baffles.

I originally purchased a pair of XA-60.5s for my system after running a pair of ModWright KWA-150s in bridged mode on high bias. I really liked the tone of the ModWrights and thought I'd like to try full class A. Given that the 5As have powered woofers, I thought that the XA-60.5s would be sufficient for my system, room, and listening habits, but I found them swinging out of class A (moving meters) more than I liked. So I traded up to a pair of XA-100.5s and have been very, very happy. That said, if I find myself with extra cash lying around after upgrading my front end and preamp, I would love to have a pair of XA-160.5s just because.

Based on my experience, I think the XA-100.5s would be more than adequate in your situation.

I have thiel 2.4 speakers. I am curious as to how you compared the modwright amps to the pass xa100.5. I very much appreciate your input.

Tom

I owned them both in the past. The difference in sound and more in authority is clear. The overwhole sound of the 100.5 was a lot better. The same about the stage and the extra authority. I found the difference bigger than I thought it would be. That time I used it with the XP-20.