The system is playing the New Smaller model speakers Miracoli.  The main difference is that the Upper Bass horn goes down to 140 hz, and the Bass is done by a Sealed cabinet with a pair of Servo Controlled 8" subwoofers, both shooting sideways in opposing fashion, this creates the illusion of a pinpoint center bass coming from the horns.  Bass is also time aligned with the rest of the horns but since it is amplified by its own subamp, phase correction is always needed.

This opposing subwoofer cabinet configuration cancels out each other vibration quite effectively.

I am using the wonderful MicroZOTL amps everybody has been raving about. They put out One full Watt!  On 106 dB horns this is enough to get huge dynamics and enough output to drive you out of the room!   I have two amps and am Triamplifying, One Stereo MicroZOTL per side plus of course both mono subamps on each of the speakers.  At the moment I am not using a preamp, I go from the source directly to the MicroZOTL on each side. Volume matching is complicated but we will have a Resistor loaded Volume control to match everything pretty soon.

The amps have incredible speed and dynamics with the horns, but mainly a wonderful tone, not tubey but just musical, I have to say that silver cable helps them to bring out all the detail that seemed to be clogging inside the tubes, changing the cables from Cu to Cu/Ag was fascinating, the tone is even better and the soundstage exploded, with none of the usual scratchynes of Cu/Ag cables.