Thanks for your explanation regarding the SR gear. I doubt that, at my age (70), and the state of my hearing, that what the investment for these tweaks would be, I may not reap the full benefit that someone with younger ears might receive.
I love how the system sounds with the SET amp, but I'm trying to keep the hours down on the pricey EML XLS 300B tubes. The Class D is also a result of my old five channel amp going on the fritz, and a healthy curiosity about these amps, led to my purchase of the first kit. I was so surprised at how good they made the Tannoys sound, I made a three channel amp for the center and surrounds, and made a 500 Wpc Class D amp for the Tannoys.
They sound amazing, at a ridiculously low price, so they are here for the long haul. Being a retired old blue-collar audio guy, this has worked out well for my situation.
Enjoy, and regards,
Dan