Good points you raise @ledoux1238. I admit to having reservations about digitizing all signals passing through the DSP of the 8c (and the Sanders version of same). I accept the assertion that digital technology has improved to the point of it being as close to complete transparency as is much of analogue, but still, why do it if you don’t have to?
One thing to know is that the 0-180 degree phase control (which provides from zero to 16ms of delay), gain control, damping control (high/low/medium), extension filter (14Hz/20Hz/28HZ), and crossover frequency (up to 300Hz!) and slope (1st/2nd/4th order) controls (amongst others) included in the Rythmik Audio plate amp make possible the integration of the LFT-8 panels and OB/Dipole Sub just as well as does the DSP unit. In addition, the OB/Dipole Sub features Brian Ding’s Direct Servo Feedback control of the 12" woofers, which also provide full output down to slightly below 20Hz, over an octave lower than the LFT-8 b and c woofers.
At any rate, both the b and c version of the LFT-8 really deserve to be more widely known by audiophiles interested in planar-magnetic dipole loudspeakers. Why on Earth it took Guttenberg 33 years to get around to hearing them is what I would like to know! Everyone knows about Maggies, while the Eminent Technology LFT-8 remains virtually unknown. Bruce Thigpen may prefer to keep Eminent Technology at a manageable size, but sending a few pair of LFT-8c’s out for review by print mags may provide him with a better eventual retirement.😉