Just bumped into this thread a few days back…
Three weeks ago a close friend who is dealer to a few selected products locally call me to invite me to hear his last addition… a class D new amp who just received… Was pretty skeptical being heavily tube biased… but my friend has a lot of miles in audio, and sensibilities that we share so …We heard the AGD Tempo on a pair of marvelous QLN monitors driven by an LTA preamp…The Tempo is the new entry level offering, a stereo version of the Audion monoblocks…We then we took it to my place and hook it to my Gibbons X driven by my Supratek Grange …
After those two sessions I can truly understand and agree with your comments on the AGD line… In my system it clearly outperformed the marvelous First Watt F8, Nelson’s latest iteration on his remarkable boutique line… Have to tell you it got surprisingly close to my beloved Lamm ML2 SET amps… The Lamms were superior in most aspects but the small AGD’s performance was much closer to them than to the F8 which is surprisingly considering it’s dna…
A couple of caveats… we matched the Tempo with a couple of high efficiency speakers. The excellent Dirty Weekend 4 from Zu at 97 eff.and a 92 db model from QLN, specifically design and built for tube matching and it was nice, but did not had the magic it show with more difficult loads… We also drove it with his own AGD Alto preamp and it did very nicely, but again, did not had the magic it showed with really good tubes preamps like the Supratek and the LTA… We are waiting for a pair of Audion monoblocks that should arrive next week to see how much more it adds to the Tempo experience, and which of them is going to take the place of the excellent F8 in my rack…
So, in my experience and opinion these Gan class D amps are in a class by themselves that when properly matched and driven, as is the case with mainly every true high end component, can be a truly end game amplifier with which one can live happily ever after… At least, I know I could …