Sundown Audio M18 Car Subwoofer – 18" Dual 1 Ohm, 2000W RMS/4000W Peak, 3" Aluminum VC, 35mm Xmax, Mega Roll Surround, Quad Magnet Motor, Low-Distortion SPL Sub

Extreme Power Handling: The Sundown Audio M18 subwoofer delivers immense bass with 2000W RMS / 4000W Peak power handling, ensuring phenomenal performance for even the most demanding car audio systems. This 18-inch subwoofer provides industry-leading levels of low-distortion output.
Revolutionary Mega-Roll Surround: Featuring Sundown’s custom-tooled Mega-Roll Surround and patented frame design, the M18 achieves an incredible 35mm one-way linear excursion. This allows for the lowest possible bass extension in various enclosures with minimal distortion.
Advanced Thermal Management: Built for sustained high performance, the M18 includes a 3" diameter 4-Layer Round Wire Aluminum Voice Coil on a thick aluminum former. A high-velocity pole vent, heavily vented magnetic gap, and proprietary cast-aluminum frame-base venting system keep the coil temperature in check.
Robust & Optimized Design: The M18 boasts a quad stacked 200mm (7.87”) diameter motor structure with a 20mm thick top-plate for efficient magnetic circuitry. Its durable construction is highlighted by an etched all-black backplate and special M-series magnet boot design.
Versatile Enclosure Compatibility: While primarily optimized for 7.0 cu ft net ported enclosures (tuned to 32Hz with 112 sq in port area), the M-series uniquely excels in sealed (3.0 cu ft) and IB applications. This flexibility makes it a highly adaptable choice for diverse car audio systems.

Sundown Audio M18 Car Subwoofer: The New Standard in High-Performance BassUnleash a new realm of low-frequency excellence with the Sundown Audio M18 Car Subwoofer. This 18-inch subwoofer redefines "entry-level" in the Mega series, delivering intense, high-fidelity bass with stellar low-frequency performance at industry-leading levels of low-distortion. Designed for professional car audio systems, the M18 combines groundbreaking engineering with a visually striking aesthetic, featuring a new laser-etched back-plate and special M-series magnet boot design, ensuring your setup not only sounds amazing but looks the part too.Extreme Power & Unmatched Excursion: The M18 is built to dominate, offering an impressive 2000 Watts RMS and 4000 Watts Peak power handling. This formidable power is harnessed by a custom-developed 3" diameter 4-Layer Round Wire Aluminum Voice Coil wound on a thick aluminum former, specifically designed for optimal winding packing density. This innovative coil drives an incredible 35mm one-way linear excursion, allowing for truly deep and impactful bass reproduction with exceptional clarity and minimal distortion, even at punishing volumes. Its RE (Ohms) of 2.12 and robust BL (NA) of 17.044 contribute significantly to its formidable performance and control, providing an unparalleled audio experience.Revolutionary Design & Patented Technology: At the heart of the M18's performance lies its custom-tooled and patented frames (US Patent Numbers D691596, D691597, D691598, and D741841) and our signature Mega-Roll Surround. This proprietary combination, coupled with Sundown's fully computer-optimized PG linear suspension, allows for the lowest possible bass extension while maintaining extremely low levels of distortion. The subwoofer's robust build is further enhanced by an etched all-black backplate and a massive quad stacked 200mm (7.87”) diameter motor structure with a total magnet stack height of 88mm (3.46”), ensuring an incredibly efficient magnetic circuit.Superior Thermal Management for Longevity: To ensure sustained high performance even during the most demanding listening sessions, the M18 incorporates Sundown's highly efficient high-stroke coil ventilation system, originally developed for our flagship X and Z series. This advanced system features a high-velocity pole vent, a heavily vented magnetic gap through the back-plate, and our proprietary high-velocity cast-aluminum frame-base venting system. These meticulously engineered cooling mechanisms actively manage coil temperature, allowing the M18 to perform flawlessly and reliably for years to come, maximizing your enjoyment.Optimized Enclosure Flexibility: The M-series was designed from the ground-up to become the new standard in the low-frequency / small, ported box subwoofer category for its price range. It is primarily optimized for 7.0 cu ft net ported enclosures with a recommended tuning of 32Hz and a generous port area of 112 sq in. Uniquely for a Mega series subwoofer, the M-series also opens up the possibility for sealed (3.0 cu ft) and IB (Infinite Baffle) applications, offering unparalleled versatility for diverse installation needs and acoustic goals. Its substantial Outside Diameter of 18.46” and Mounting Depth of 14.05” provide flexible installation options for a wide range of vehicles.Industry-Leading Low Distortion: The M-series stands apart due to its incredibly linear suspension and the strategic inclusion of a magnet inner-diameter aluminum shorting ring. This critical component ensures superior inductive distortion performance across the entire frequency range, resulting in exceptionally clean, crisp, and highly accurate bass reproduction without unwanted artifacts. We are confident that the M-series will go down in car audio history as one of the best low-distortion subwoofers per-dollar of its time, delivering an unmatched audio experience that truly sets a new industry standard.