Reddit mentions of PIONEER TS-SW3002S4 12" 1,500-Watt Shallow-Mount Subwoofer with Single 4ohm Voice Coil

What's your budget? There are several shallow mount subwoofers on the market.

On the cheaper end is something like this Pioneer

On the higher end is something like this JL

0.95 cubic feet per sub or total? If its 0.95 cubic feet total then this pioneer shallow mount is your best bet. You can get two and wire them in parallel for a final impedance of 2 ohms. Use this matching pioneer amp and you've got an el cheapo system that should sound decent.

Thanks to all the people who were helpful, including the ones just trying to be helpful....

I found an old thread on a Volvo forum with someone having similar issues, he replaced it with a Pioneer unit, similar to this one:

http://www.amazon.com/Pioneer-Ts-sw3002s4-1500-watt-Shallow-Subwoofer/dp/B00K9854T0/ref=sr_1_1?ie=UTF8&qid=1464740744&sr=8-1&keywords=TS-SW3002S4

Just ordered it.

Parts so far: https://www.amazon.com/gp/product/B01KKHTMLA/ref=ox_sc_act_title_4?ie=UTF8&psc=1&smid=AO3YTZ6BCMVCB https://www.amazon.com/gp/product/B00NF5EQHK/ref=ox_sc_act_title_3?ie=UTF8&psc=1&smid=ATVPDKIKX0DER https://www.amazon.com/gp/product/B00A0LUG30/ref=ox_sc_act_title_2?ie=UTF8&psc=1&smid=A1AUFI5NHGNZ61 https://www.amazon.com/gp/product/B00K9854T0/ref=ox_sc_act_title_6?ie=UTF8&psc=1&smid=A2NYACAJP9I1IY

Start with the box. On the description is says...

> Enclosure Volume: 1.69 Cu. Feet/ Mounting Depth: 4-1/2"

I'm 95% sure this means total volume, meaning 0.85ft^3 per side. The Depth is also key.

What this all means is you need a flat sub that plays well in a 0.85ft^3 box. I'd recommend these Pioneer 12" flat subs over the Rockford's based on the performance of the 10" versions of the same Pioneer subs I have and the appearance of the Rockford woofers, but the Pioneers are 4 ohm woofers.

As for the amp you posted, it simply doesn't match the subs. Look for something like the Hifonics Brutus or Zeus, or PPI sub amp for around $150-200. Look for Class D architecture and a remote knob. Look for sub amp that can generate at least 1000 watts rms into 1 ohms.

Rockford is a good brand for sub amps, but not the Punch line. The regular Rockford line is a bit pricey but well regarded. The nice Rockford Class D, 1200 watt @ 1 ohm amp is $220 on Amazon Prime.

If you don't have a Big 3 upgrade & good wiring kit you'll not reap the benefits of all the money spent on amps & subs. A big 3 kit costs maybe $30 to DIY, and a good run of 1/0 power cable & accessories fuses, is less than about $50. Don't short change performance by not doing basic, necessary upgrades.