Don’t mean to rock your boat but I considered the Crown XLS Drivecore amps but the Noise floor is is in the -70db range so worse than most mid tier class ab amps. This was the only turn off. They got power to drive a small moon for sure…for PA they should be fine but def not for home listening IMHO.
Actually it is SINAD that is in the 70's, Signal/Noise is 103db (A weighted according to spec) ... that is why I considered them an experiment when I purchased them - I compared them to my Quad 606's - specced at 105db S/N - on my setup no noise is audible/noticeable. (perhaps a failure of my ears.... ) - And the sound is somewhat smoother, "easier" through the Crowns than through the Quads....
According to the Crown spec sheet, THD is rated at less than 0.5% at rated power.... that would give them a very poor SINAD of 46db. - Actual measurements by Amir put them in the mid 70's (he measured both the 1502 and 2502.... which are specified identically on their spec sheets, but were measured on the bench at 70db and 76db respectively - so there is a bit of production variation .... +/- 10% ? ) - but the issues with them such as they may be, are in the THD space rather than the noise area.
And that area is always contentious with regards to "audibility" and "preferences" - as many people prefer the sound of their far higher distortion valve setups, to the measurably lower distortion solid state amps they compete against!
So yes - I purchased them as an experiment - looking to see what the impact would be of AMPLE power (in the legendary words of Aston Martin and Bentley back in the day " More than adequate power under ANY circumstances") - but the audible results have kept them in my setup.
Running my back of the envelope (or excel!) - calculations - I could probably live with an amp that specced at around 550W@2ohm or thereabouts (less than half what these do - probably circa 150W@8ohm but with loads of current) - and would love to try such an amp, with far more refined noise/THD capabilities.... But I would have to be able to listen to it in my setup, with my speakers.... which means purchasing amps to experiment with - an expensive exercise.... and one that I am current not inclined to indulge in - my itch is currently well scratched!