I have 2 rfd2208 subs wired to a single 4ohm load connected to an amp bridged that supplies the subs 500watts rms. I had the subs in a sealed box about .75cuft no divider. The outside box dimensions are about 31"w x 13"h x (3.5"D1 & 8"D2) I used 3/4" MDF. This is a wedge shaped box. The...