Id say doa single Sundown Audio E8 in a side firing 4th order. 0.4 cubes sealed 0.8 cubes ported. Would sound great, and save room. Also, if you want a QUALITY speaker, try Sundown out. No cheap plastic cones, soft spiders, or kapton coated coils like all Kicker, Alpine, and Sony subwoofers are made with. You can order the Sundown from Woofersetc.com. If your husband likes to build things himself, i can give you a cut sheet of exactly what you need.