Pass Labs XA- ".5" ???

Kevziek is right though, the meter on the XA series is just a "nice-to-have" feature and does not perform any function.

On the X.5 series, the meter, when it starts moving, indicates that bias on the amp is going from Class A to A/B operation.

My B&W N803s make the meter move on my X250.5.
Playing a recording with some decent bass/mid-bass, I have to get the preamp volume above the 10 o'clock position and the meter on the amp starts moving.
But I love the Class A operation of the X250.5 amplifier when listening on low levels. Plenty of drive, slam and detail.

Tboooe,

I had the X-350 paired w/ Audio Physic Virgo II's. The Virgo's are 4 ohm and 90db. When I listend to Jazz the meter never moved... and I have a large room. But if I put on Led Zepplin 1...
I could get it bounc'in! I think the original 350 was rated 20 watts class A.

Greg

Driving VSA jr's, said to be 88 db, the meter would swing to 2 or 3 pm on quite loud levels of big band jazz. And it would regularly swing to 1 pm at "regular" loud levels.

Pass Labs told me the amp could handle much more than what I described, without distorting and the amp would be just fine.

Even though the meter may move, I highly doubt the amp is outputting anywhere near its rated power. All I was trying to do was support gandme's claim that the XA160 can power almost all speakers without a problem. The fact that the meters move indicating a transition from class a to class a/b operation has nothing to do with my contention that I do not believe most people need all that much power.

Thank you Tboooe!