HERTZ MP 300D4.3 Mille PRO dual voice coil subwoofer 4+4 Ohm

The Hertz MP 300D4.3 Mille PRO is a dual-voice-coil subwoofer with a 4+4 ohm impedance, designed for car audio systems that need powerful bass in a compact size. Hertz developed the Mille PRO range by refining manufacturing processes used for its flagship Legend series, aiming to bring that build quality to a wider audience.

Its cone is made from mineral-filled pressed paper, the same material used in the Legend line. A V-cone profile increases stiffness so the cone moves more like a piston. The surround is made from high-purity butyl rubber (IIR-butyl), and the lightened cast aluminium basket matches the Legend series, providing mechanical damping for clear sound.

A dedicated cooling system removes the need for a large rear cooling vent. The snap-on terminals allow secure connection of 8 AWG speaker cable.