Having spoken to a few hifi experts online I now realize that the driver I have chosen will not have the frequency range I desire (my Kappa 10a stops at around 2kz) – stupid since I ordered two more of them a couple of days ago. It now sounds like a coaxial driver (woofer and treble mounted together as one from two separate elements) is the ideal choice. An Emincence Beta 10CX combined with an Eminence ADS 1001 treble unit, rather than the Emincence Kappa Pro 10a I hade before. This means different mounting data, but since this part of the sculpture is not built yet it will not be a problem. I’m being recommended this combined unit which looks good and as I understand will also sound good.