Hertz MPS 300 S4 – Deep, Hard-Hitting Bass in a Slim, Smart Package

The Hertz MPS 300 S4 is the shallow-mount 12″ subwoofer built for drivers who want big, forceful, high-quality bass without sacrificing space. Designed for ultra-compact enclosures, this Mille Pro shallow sub fits behind seats, under cargo floors, and in tight installs where a full-depth 12″ just won’t go — all while delivering true Hertz power and precision.

Even with its slim profile, the MPS 300 S4 delivers deep, controlled low end, impressive output, and the warm, musical tone Mille Pro subs are known for. It handles real power, stays tight at volume, and blends beautifully with high-end front speakers for a full, rich sound.

If you want space-saving install options with zero compromise on performance, this is the shallow 12″ to beat.

Perfect for: Drivers who need a compact enclosure but still want powerful, accurate, premium-grade bass from a high-end Hertz Mille Pro subwoofer.