LTA Ultralinear vs Pass Labs XA25

@shahram
In my system and room, driven by the matching Rogue RP-5 preamp, the Rogue ST-100 has better soundstage depth.
The XA-25 is comparatively slightly more forward sounding in the midrange and guitars, horns and percussion have better presense.
Through the Spendors, the top end is very smooth through both amps but the Pass has much better resolution of details. I can more easily differentiate between different cymbals and how then drummer is striking them through the Pass XA25

@ddafoe 

I mainly listen to jazz and rock and listen at about the same levels as you mentioned (80db avg). The XA-25 can easily push the Spendors to lounder levels but then it gets too loud for my space.
I also like that the amp is smaller and lighter than the Rogue ST-100. It also doesn't get any warmer than the Rogue.

@shahram

I bought a Pass XA-25 a couple of weeks ago to drive Spendor D9s. The Pass replaces a 100W Rogue ST-100, and in my system it bests the Rogue in almost all aspects. It is much more transparent and dynamic and has no problems driving the Spendor D9s. My room is 13 x 19 with vaulted ceilings.