Hi all,I need some help with a 15" low frequency cabinet I'd like to build. I'd like it to cover approx 30hz-130hzThe drivers I can potentially buy are 2205, 2035 are 2225 It'll be running with my 4411s. I could cross my 4411s at 130hz( using my fixed internal xover in my preamp) then the 15" could take over from there.I have no experience designing boxes but can build boxes. Just wondering if there're plans available for something suitable.Is it worth trying to do something like this or am I just better off with an active sub?Any help much appreciated! Banga