Re: 15 " Rlp
Ehsan, there's some free designs in this section somewhere, there should be a 3.5 cu. ft. box in there. I'll check SS's site and check for more info. But more than likely 3.5 cubes at 30hz would be pretty nice. Sq subs I've seen are made to be tuned lower (SS, TC, etc) SPL subs are more for higher tuning (DD, AQ, etc). But you can probably tune the RLP to 28hz as reccomended and still have decent output in those ranges. Also you'll probably need to figure out how much port area the RLP needs, usually it's 12-16'' of port per cubic foot. I used 39 sq inches on my BL, and it has NO air turbulence, and moves hella air.
- 12'' Fi BL Fully Loaded - 2.2 cu. ft. box @ 35hz - 29 sq. in. of port - Stinger SPV 44 - Us Amps Merlin MD3D @ 2ohm - 5.25'' PG RSD Components - Big 3 in Hyperflex 1/0 - Pioneer DEH-3000IB - 140 sq. ft. of Stinger Roadkill Expert
Refs: Slam, Ridinhi, Blados, Pioneerpimp, Kowboy