6-8 cubes always worked great for me, mine is currently at 8. Port area i just pretty much play around with tho lol, i dont have a set number i go by yet.
149.4 dB and climbing....
18" Solo-X, Shok Industries 3.5k and two 100.4s, 250 amp Mechman Alt, 4 runs shok competition cable. TEAM SHOK - WI