Pass XA30.5 vs. X150.5

What Jtinn said.

If 95db peaks at what distance - 1 meter measurments? If so, you should need about 1.8 watts for that - but I suspect that is not the distance of your measurement. If you want to know if it is enough power Pass or Reno will certainly be able to tell you - they are not going to BS you, they are the folks I would trust for issues related to power,loudness, and drive. As for quality of sound, I, and many others, think the Class A Pass gear (XA.5) is in the top ranks of what SS is capable of.

Yes, 150 watts versus 30, but the XA.5 seem to be conservatively rated, at least they sound that way. You should be ok with the lower power with speakers 89db or higher, less then that you are probably pushing it.

Completely different animal, XA.5 is Class A and the the X150.5 is A/B - 99% of people will tell you the XA.5 is the far better amps in the Pass product line. I think you would have no problem with the XA30.5 power, especially with a 40hm load. Call Pass or Reno HiFi, they will give it to you straight as to whether the match is suitable.

Wow! Wonder why the spec it at 30 watts, they did say in an understated manner that it was "conservatively" rated, but that is REAL conservative. Is that a continuous power measurement or peak?

OP, if you do a search for XA.5 you will find a few threads that discuss the differences between the Class A and A/B Pass amps. If money were no consideration, they only time I think folks would opt for the A/B would be to bi-amplify and used as a bass amplifier where the differences Class A provides for really come through, otherwise, used full range....well, read the threads.