Class D

The original UCD module had lots of feedback.....all around the output coil....The Ncore modules added even more feedback and the Purifi adds even more feedback.  Most people feel the Ncore sounds better than UCD and Purifi sound better than Ncore.  Read the reviews of the "super high feedback" Purifi amps.......they like them.  I am not a FAN of feedback....nor am I not a FAN.  There are lots of ways up the mountain.  Again, everything matters.  One amp with 500K switching could sound way better than another at 1meg switching.....or visa versa.....One amp could sound better with more feedback....or with less feedback.....it is not one thing......everything has to be done well.  

that you lie or get hostile about something

Hey sunshine, if you look back just one post, it's Ralph that got hostile calling rubbish on me first, I just reciprocated the same back, get a life, or stop shilling/stalking 

Don't know what he is trying to achieve jumping on all the Class D threads and making a mess

He just told me this was a rumor.  Hahah.