hi guys...i recently got a pair of AR 312 ho loudspeakers...sound great!..even tho the foam surrounds on the mids are gone...anyone can give me some ideas on replacements for them on improved mids with rubber surrounds?..and tweeter upgrades?...running those on a denon 4802r......also..i am looking to diy a home subwoofer..have 2x boston G5 10" subs and 2x boston tuneable passive radiators mated with a NAD 215thx amp...any ideas on box designs?...size is no issue