I know I am, and believe most class D amp proponents on this thread are, very open minded toward further potential advancements such as the newer GaN FETs, improvements in the filters used to remove the carrier frequency prior to amplification and even the as of yet unproven benefit of MHz-plus signal carrier frequencies.
With the extremely high quality performance levels of such a large number of class D amps using just currently available technology, significant future improvements in class D amp performance levels is difficult for me to imagine. I honestly cannot identify any aspect of my good quality D-Sonic M3-600-M class D amps’ performance that I would characterize as deficient.
As an experienced user and proponent of good class D amplification, I have no choice but to consider claims of class D harshness and sonic anomalies in the midrange and treble as illegitimate, view those claiming such with great skepticism and suspect them of having ulterior motives.
I state this based on my own experiences using multiple class D amps in my system for about 4 yrs, the complete lack of evidence that current signal carrier frequencies in the 400-600 KHz range affect frequencies in the audible range, anecdotal claims of class D upper frequency harshness being based on early class D amps and very rarely on the newer good quality amps and my complete inability to detect any sonic anomalies or upper frequency harshness. If you can’t perceive any sonic issues then you have no sonic issues, right?
To be fair and empathetic to those who honestly hear sonic anomalies in good quality class D amps that I and many others have never detected, perhaps future research will discover that these anomalies do actually exist but only some individuals are able to detect them.
If this is the case, that is an affliction that I wouldn’t wish on georgehifi, because listening to music through good class D amps is really quite spectacular when you’re not afflicted with this horrific condition.
Just really bad dumb luck. I hope the GaN FETs and/or higher switching frequencies will eliminate or at least ease the suffering of all those afflicted with this horrendous and inhumane potential explanatory condition.
Best wishes,
Tim