Made my first box for new infinity kappa 1200 subwoofer : r/CarAV
1x Infinity PRIMUS 1200T 12-Inch 1200W Car Audio Subwoofer + 12" BassTube 618952491120 | eBay
Infinity Kappa 1200W Subwoofer - PASMAG is the Tuner's Source for Modified Car Culture since 1999
Infinity Primus 3000A 300W RMS Power Compact Mono Subwoofer Car Amplifier System Bundle with 12" 1200W Max Power High-Performance Car Audio Subwoofer and Amplifier Wiring Kit - Road Entertainment