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.
2009 Sienna 3.5L Subs : C2 threatcon 15s. Sub amp: hifonics brx 2400.1D x 2
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 almost installed. 0 gauge Audio technix ofc all around, 2 group 31 agms in the back.