Oops @jasonbourne71. I think you makes it three, as @whart mentioned he still has a pair of QUADS up and running. I too have a pair, but they’re still down in SoCal in storage. I gotta bring them up to the Northwest this Spring.
I have all the planar loudspeakers a boy could want: Magneplanar Tympani T-IVa (upon which the MG30.7 is modeled), Eminent Technology LFT-8b and LFT-4, and QUAD ESL’s. Plus a pair of ESS Transtatics, which feature RTR ESL tweeters. That was ESS’ top-of-the-line loudspeaker (introduced in 1970 I believe) that preceded the Heil AMT-1. It uses KEF dynamic drivers for bass (the legendary B139 woofer, also used by David Wilson in the original WAMM) and midrange.