Hi çhris,
Well kind of! The static's panels will be driven directly from the anodes of the 813's via a high-voltage cap,so yes,an OTL in the sense that there are no output transformers! The difference with this should be that there will be no shortage of drive.Should do wonders for the bass response if nothing else! 813 should be good for about 1.5 kV ish peak to peak from what Nick has said,which should be plenty for the ESL III's.I'm looking forward to this as I remember Paul Barker saying this type of arrangement was the best sound he'd ever heard.I hope so!