Here is the system with the two-way open baffle planar mids and tweeters with the two 4x12 servo subs.
The planars are being driven by modified ChipAmps. All Class AB solid state direct coupled at the inputs and outputs. These have balanced inputs for full use of the digital crossover.
The amps are being driven by the dspMusik digital crossovers with time delay to align the subs to the mains due to the distance offset.