0.8 Ohm woofers ?
3 Woofers 1 coax 1 woofer in the vertical line would be better than 4 woofers 1 coax. You're doing OB?
But ordinary drivers of nominal 8 Ohm impedance have 5~6 Ohm DCR / about 3 Ohm DCR to 4 nom., no?
Are these 1 or 2 Ohm double VC woofers?
That's all well & fine, but whaddya gonna put in the living room-- you know, where the BIG speakers live!!
(Good Luck with your project!)
Don
Pass F5 then looks like a nice one.