It looks like Mark is at it again with a new(ish) line of speakers using the Daniel Hertz label. They use a compression driver (>1800hz), a 12" Mid and an 18" Sub (<80hz). These are billed at being >100db efficient and seem to be very similar to the Synthesis systems but maybe more geared for much higher SPL. Anyone know what drivers he might be using? They look like JBL or TAD to me, but I'm not sure. I imagine these are quite pricey. What do you think about running a 12" up to 1800hz? That CD waveguide reminds me of the Manta Ray Altec Horn of the Model 14. Anyway, here are some pictures.