I've owned the predecessor to the Antileons, the Reference One Mono blocks and from there went to Lamm M1.1. I have also had Lamm M1.2 amps, Krell FPB series, Krell KAS2, Pass Aleph O. If you wish to buy American, you might also consider Boulder, which is top notch.
From what I have read about the Krell EVO, the sound is supposed to be quite good. I am not sure the internal heatsinks dissipate enough heat insofar as they are basically enclosed.
As for sound. The Gryphon I owned were powerful, a bit dark and rough around the edges and were absolute heaters that eventually became unbearable to live with in southern California. But they were impressive nonetheless. The Lamm M1.2 amps are sonically excellent but at their price point, I find the build quality to be reminiscent of something I could pull together myself at Madisound (I refer to the chassis and hardware, not the circuitry of course).
From what I have read about the Krell EVO, the sound is supposed to be quite good. I am not sure the internal heatsinks dissipate enough heat insofar as they are basically enclosed.
As for sound. The Gryphon I owned were powerful, a bit dark and rough around the edges and were absolute heaters that eventually became unbearable to live with in southern California. But they were impressive nonetheless. The Lamm M1.2 amps are sonically excellent but at their price point, I find the build quality to be reminiscent of something I could pull together myself at Madisound (I refer to the chassis and hardware, not the circuitry of course).