Can't think of any 6dB active analog xovers. Like the Digmoda idea but still wary about class D for tweeters. As far as a separate crossover, other digital options are Xilica (might be the best of the 'pro' stuff and stand-alone option for 8 out), Ground Sound, miniDSP and, of course, Behringer (no comment). Full-blown preamp/RTA/correction and up to 3-way are DEQX and Holm Acoustics (interesting tutorial on website). No law that it has to be entirely active, other than trying to duplicate or improve upon the existing passive PCB - particularly the mid/tweeter xover. Then, there's software/computer based xovers and RTA's. Thuneau Allocator is just one of many but really haven't done much homework here.
Hypex amps/modules might be interesting for this project as well. Not like the SC4 isn't big enough.
http://www.stereophile.com/content/dunlavy-audio-labs-sc-iva-loudspeaker-specifications
...."(frequencies not specified)"
Hypex amps/modules might be interesting for this project as well. Not like the SC4 isn't big enough.
http://www.stereophile.com/content/dunlavy-audio-labs-sc-iva-loudspeaker-specifications
...."(frequencies not specified)"