Lamm 1.2 vs. Pass xa 60.5

Good point, Bo. You can be sure the .8 series is vastly different than and utterly superior to every other iteration of Pass Labs amps ever created. After decades of trying, it's the .8 series that finally gets things right! Thanks for that insight.

I think it is helpful for a decision when we realize that we should take care of the following:
Amplifier power / Quality of tone

To buy power is no big problem, to buy good sounding amps generally is a bit more difficult and to look for good sounding high powered amps is a task. Not easy. Depends of course what the owner is looking for but low sensitive speakers can make life difficult sooner or later but see it with a car explanation, a low efficiency speaker is like a fat car, for example a Mercedes 500, your amp is like an engine. When you accelerate straight on, all is fine but when you drive small, curvy rads with a lot of speed changes, the MB500 can do that but it is work and you will feel, it is not made for that (Some say their System sounds better with some kind of music). Even with a bigger engine you have to move high mass (car weight) Same engine in a car with half weight (= a high sensitive speaker) and all those accelerations, curvy driving is easy like breathing. You have much more fun with driving, or with listening to subtle details.

Hi George! The Lamm M1.2 can easily drive the OP's 86db sensitive loudspeakers. Don't know about the Pass, but I know the Lamm can because I've heard it do just that to 85db sensitive, highly reactive loudspeakers in a very large room. No problemo!

Any reliability problems with Lamm hybrids or a vicious rumor ?

I just went from XA60.5's to XA100.5's driving my Avalon Eidolons in a 12' x 14' room. Because of the small room, I was thinking I wouldn't hear much of a difference but boy was I in for a surprise.
The xa100.5's took command of the speakers. Better bass control and depth, but the real surprise was the improvement in separation of I instruments and a more 3D soundstage.
Boxing up the xa60.5's this weekend as the xa100.5's are staying :).