Re: how much polyfil is enough?
Not gonna happen. it might cover for .1 to .2 cubic feet max but not .4. Your going to need a lot more and you'll be introducing a lot of heat if you over stuff it.
Clip city b1tch, clip clip city b1tch. 10's, 12's, 15's, goin up in flames b1tch.
09 Sienna Subs : DC level 5 18s d2. Sub amp: banda viking 7k
Headunit: Pioneer 80PRS bought used from vertex audio Mids/Highs amp: PPI Phantom 900.4 - bought from dragnix
Front stage: 3 way active front stage with Massive Audio CKX tweets, alpine type R 6x9 midbass in doors + DB drive pro audio 6.5 in the kick.
320 amp Singer alt. 0 gauge Audio technix ofc all around, 2 group 31 agms in the back 250 amp hours total.