The X250 (and smaller X amps) have feedback for bass control. The X350 & larger X amps don't.
Some purists don't like feedback. I hear an X150 everyweek at my friend's house, it sounds very, very good, to me.
I've heard the X350.5 at my local Pass dealer. Everyone agrees it is a big step up in sound quality, over the original.......
The X150 my friend owns has the same plastic cased output transistors as the new .5 series amps.
Some purists don't like feedback. I hear an X150 everyweek at my friend's house, it sounds very, very good, to me.
I've heard the X350.5 at my local Pass dealer. Everyone agrees it is a big step up in sound quality, over the original.......
The X150 my friend owns has the same plastic cased output transistors as the new .5 series amps.