{"product_id":"hertz-mps-300-s4-12-shallow-mount-subwoofer","title":"Hertz MPS 300 S4 12\" Shallow-Mount Subwoofer","description":"\u003cp\u003eThe Hertz MPS 300 S4 is a 12-inch shallow-mount car subwoofer designed for systems where conventional deep subwoofer enclosures will not fit. Its 88 mm mounting depth helps make it suitable for compact custom installations, including under-seat or rear-bench enclosure applications. This model uses a single 4-ohm voice coil and is intended for dedicated low-frequency reproduction.\u003c\/p\u003e\u003cp\u003eWith 500 watts continuous power handling and 1,000 watts peak power handling, the MPS 300 S4 is built for use with an appropriately matched mono or bridged amplifier. Its 25-400 Hz frequency-response specification supports integration with a full-range speaker system through an active crossover. Hertz specifies a 22.7 L sealed enclosure as a compact recommended alignment.\u003c\/p\u003e\u003cp\u003eThe polypropylene cone and high-density flux ferrite motor are paired with a six-layer copper voice coil for thermal capacity. Hertz uses a dedicated spider and voice-coil support arrangement to place the magnetic assembly farther inward. This layout reduces mounting depth while retaining substantial cone travel.\u003c\/p\u003e\u003cp\u003eHertz Air Intercooling Revolution (A.I.R.) technology is designed to manage airflow within the voice-coil inner chamber and magnetic assembly. The design is intended to reduce air-compression effects while improving cooling around the motor structure. The subwoofer has a specified Xmax of 16.8 mm and a maximum mechanical excursion of 20 mm.\u003c\/p\u003e\u003cp\u003eThe MPS 300 S4 is a practical choice for a space-conscious bass upgrade that still uses a full-size 12-inch driver. It can be installed in a sealed enclosure for compact, damped bass response or in a properly designed reflex enclosure when installation space permits. A grille is provided to help protect the driver in exposed cabin or cargo-area installations.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-Shallow Depth:\u003c\/strong\u003e The 88 mm mounting depth supports installations with limited enclosure clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500W Continuous Handling:\u003c\/strong\u003e Supports amplifier matching for substantial low-frequency output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle 4-Ohm Voice Coil:\u003c\/strong\u003e Simplifies wiring to a compatible 4-ohm amplifier load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA.I.R. Technology:\u003c\/strong\u003e Optimizes internal airflow around the voice coil and magnetic assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSix-Layer Copper Voice Coil:\u003c\/strong\u003e Provides thermal capacity for sustained powered operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Metal Grille:\u003c\/strong\u003e Helps protect the cone while maintaining a clean installed appearance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe MPS 300 S4 uses a polypropylene cone, high-density flux ferrite magnet, die-cast aluminum frame, and non-vented rear structure. Its supplied grille combines a cast aluminum ring with black steel mesh, while the mounting hardware is designed to remain visually discreet after installation. Solid horizontal spring-loaded terminals are specified for 8 AWG cable.\u003c\/p\u003e\u003cp\u003eInstall the subwoofer in a rigid enclosure with the correct 283 mm mounting hole and adequate rear clearance. Hertz specifies a 22.7 L sealed enclosure as its compact recommendation, with suggested sealed-system filtering of 15 Hz subsonic at 24 dB\/octave and 70-80 Hz low-pass at 24 dB\/octave. Use an amplifier and wiring arrangement appropriate for the subwoofer's single 4-ohm impedance and 500-watt continuous power rating.\u003c\/p\u003e","brand":"Hertz","offers":[{"title":"Default Title","offer_id":45631825543238,"sku":"MPS300S4","price":599.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0048\/4163\/5910\/files\/71-8pqJP2VL.jpg?v=1784383358","url":"https:\/\/audiowatt.store\/products\/hertz-mps-300-s4-12-shallow-mount-subwoofer","provider":"Audio Watt Store","version":"1.0","type":"link"}