Re: new member here that could use some help.
If anything, with a crappy box, your 15s will peak at higher frequencies rather than digging into the lows. there's box builders on this forum that can build and ship you a box for around 150-300 shipped and I can guarantee you its better than the guy you met at work.
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.