re: X350
@charles1dad I do believe that the higher damping factor (DF) is appealing and its effect on bass is desirable for many. In my experience it adds a “tightness “ to bass frequencies that I just do not hear when listening to actual live acoustic lower range instruments.
Speaking of damping factor and comparing - quite a wide range with familiar amps many here listen to. Its kind of interesting studying damping factor in different type amp designs.
With Pass’ different designs and comparing, the older X350 and newer X30.8, both have a damping factor of 150.
The lower power Firstwatt SIT3 is a lower damping factor of 30, and Firstwatt F8 is 40. Then we compare to the venerable class A Pass XA-25 bounces up to damping factor of 500.
While I look for some of that lower midrange bloom and upper mid-bass bloom myself hoping for a more realistic sound,
Noting my own QS Mono 120s, have a damping factor of 15.
The latest Quicksilver KT Mono amps have a damping factor of 20.
The ARC 160S Reference Stereo amp has a damping factor of 14.
The Deware SE34I.5 into 8 ohms has a reported damping factor of about 5.7