What Difference between Pass X150.5 and X250.5?

Info just in from Pass.
Per channel continuous:
X150.5 10 watts
X250.5 40 watts
X350.5 50 watts
With higher instantaneous peaks.

teajay - thanks for your thoughts. Auditions are impossible for Pass, Herron and Placette here in N.Z. I have heard several passives and they don't "do it" for me.
The Pass pre-amps are considered a little on the dry side by the Australian importer - I will buy from him, great dealer.
So I will continue my research on suitable pre-amps.

Latest in from Nelson Pass:
"The X250.5 and 150.5 differ in power supplies, output stage size, and bias. In these amplifiers
the first few watts are single-end Class A, and they leave push pull Class A at something like
20 watts and 40 watts peak respectively."

Eril, If you live in NZ, I would give Paul a call at PQ imports and see if you can have a listen to a VTL pre-amp if you are not against tube pre's.

Pass Labs are wonderful designed amplifiers, Pass Labs offer a substantial range of amplifiers to match most loudspeakers manufactured today.
If you are looking for a Pass Labs amplifier in New Zealand please contact Parmenter Sound.
www.parmentersound.com
Thanks Jason Parmenter.

^Tacky.