The Hertz MPS 300 S4 is a low-profile subwoofer from the Mille PRO series, designed to deliver deep bass in vehicles where installation space is limited. This 12-inch driver handles 500 W of continuous power and can reach peaks of 1000 W, operating with a 4 Ohm impedance and a frequency response ranging from 25 to 400 Hz. To maximize performance within its shallow frame, it utilizes Air Intercooling Revolution (A.I.R.) technology to minimize internal air compression and improve cooling, while its non-vented rear design allows for an even shallower enclosure depth. Built for durability and precision, the subwoofer features a polypropylene cone with a nitrile rubber surround and a six-layer copper voice coil that ensures high thermal capacity. The structure is supported by a rigid die-cast aluminum frame and a high-density flux ferrite magnet. With a mounting depth of only 89 mm, it is an ideal choice for those who want high-fidelity low frequencies without sacrificing significant trunk or cabin space. It comes with a robust screwless mesh grille and uses 8AWG spring-loaded terminals for secure connections. For the best results, this driver can be installed in a sealed box of approximately 22.7 liters or a reflex box of 36.8 liters. The inclusion of the eID traceability system allows you to easily verify the product's authenticity and origin via a quick scan.