Hertz MPBX 300 S2/4 – Mille Pro Bass, Preloaded and Ready to Hit

The Hertz MPBX 300 S2/4 is the plug-and-play bass upgrade for drivers who want premium Mille Pro performance without building a custom box. Loaded with a hard-hitting 12" MP 300 woofer and tuned to perfection, this enclosure delivers deep, controlled, high-impact bass that feels powerful yet refined.

Hertz’s engineered vented design maximizes output while keeping distortion low, giving you tight punch for rock and country, smooth extension for R&B, and room-filling slam for hip-hop and EDM. The enclosure is compact, rugged, and optimized for airflow — so your sub performs at its absolute best every time you turn it up.

Whether you're running the 2-ohm or 4-ohm version, the MPBX 300 S2/4 pairs easily with a wide range of amps and brings unmistakable Mille Pro energy to your system.

Perfect for: Drivers who want a premium, ready-to-install Hertz enclosure with clean, powerful, audiophile-grade bass straight out of the box.