JL Audio Stealthbox® Custom-fit fiberglass enclosure with 10" W3v3 subwoofer — fits 2005-up Mazda 3 Hatchback at Crutchfield
2017 Mazda 3 hatchback DIY sub install, without cutting/splicing into factory wires. It sounds so good in this car. Should I post how I did it? : r/mazda3