Pass Labs int 60 vs. Luxman 590 uX ii

builder3 Can you elaborate on your statement regarding the mid-bass, Erik.

Here’s the piece I find important.
Per Luxman’s website, the 590 has: Bipolar 3-parallel push-pull
But the 509 has:Bipolar 4-parallel push-pull
Implying a lower output impedance.

This is bi-polar v mosfet and the lower output impedance (amount of damping factor) can be a bit of a furphy builder3.
As the damping factor also comes down to the amount of "negative feedback" used (global or local), and size of the output resistors the output stage has, to what amp has the "lower output impedance" (better damping factor) it could very well be the Pass Int-60.

Cheers George

For some one who loves Pass, you just did Pass a huge disservice.

No modern amp company I know of has innovated along the lines of amplifier circuits more than Pass.  Attempting to reduce a Luxman vs. Pass to Bipolar vs. MOSFET trope is something no one should do.

Pass very much has a unique sound which has attracted many (not me) and it's nothing to do with how MOSFETs sound.

The Pass sound is unique by design, and it's not just the choice of devices used.

For some one who loves Pass, you just did Pass a huge disservice.

Really!!
No, you just been caught out not knowing what constitutes low output impedance (good damping factor) in an amp and were pulled up on it, that why your backs ups, everyone knows your a Lux pusher.

I actually don’t like the Mosfet sound, when Pass built Threshold bi-polar amps, I much prefer the good ones of those.

I actually own and use the pass int 60. It is a smooth and warm in the middle amp. At the same time is is very transparent. It tends to get out of the way of the music and you just listen. Bass is very controlled and doubles its power into 4 ohm. It has a tube characteristic, which I happen to like. I am using mine with the ls50 meta’s and the sound together is like nothing I have ever owned. I have never heard any of the other amps that have been mentioned, but I can tell you, you will not be disappointed if you go with the pass. 

I am a Luxman pusher.

Everything else is projection. :)