is a bit harsh and uncalled for.Really Bob, I've acknowledged his prowess with OTL's, but let see if the Class-D modules are his ground up design or someone else's aftermarket ones, with "signature tweaks".
To the contrary, his amps are quite stable for a wide range of speakers.And you are talking about the OTL's they are very speaker specific,
unless you throw a ban-daid "autoformer" fix on them, then that gives them a few more they can drive, but your better off getting an amp that can do the job properly in that case.
Cheers George