physically the same as my TROMBONE,
but 3,5 m and 2,7 m splitted in two parts,
size ~ 75x65x11 cm each, you can place it together
to get a place for a satellite, or you place between
both 3 bridges to make a armchair like my BASSEL
without the back and smaller, much smaller.
Or flat at the wall behind a flat TV.
take AJ horn and compair it to the KORNETT simulations and measurements.
Hi, Tangband lists recommended response to 1 kHz, so I assume it's not suitable for fullrange operation. They make fullrange drivers of this size as well, they're probably a better bet for 20 kHz.
There are lots of trade-offs involved in speakerbuilding. Larger drivers can handle more power, but the cones can have more resonances. Smaller units can sound cleaner, but feasible SPL can be a problem. It depends on your situation and preferences what you choose.