The Grey Santa delivered a package to me this morning. The latest and supposed, greatest new amplifier technology. GaN SET Class D...from www.classdaudio.com .I set it up on my electronics test bench just to be sure it works before I connect it to my LS50 Metas.....First impression, one word..."BALLS!"...This think has some serious power! I'm playing it through Sony CCS speakers, $100 a pair that all the YouTubers are going crazy over. I never heard them have so much PUNCH! Serious "Attack".......At $750, this just might be the PERFECT amplifier for hard to drive speakers......We shall see!