Sundown Audio SUN-HZS12D4 Horizon HZS 12″ 500W RMS 4-Ohm Dual Voice Coil Shallow Mount Subwoofer

When you need powerful bass performance in a space-conscious installation, the Sundown Audio Horizon HZS 12" Subwoofer delivers strong, controlled low-frequency output without requiring excessive mounting depth. Rated at 500W RMS and 1,000W peak power, this shallow-mount subwoofer is designed to provide impactful bass performance in compact car audio systems. Its Dual 4-Ohm voice coil configuration provides flexible wiring options for different amplifier and system configurations. Built for demanding daily applications, the HZS 12" features a 2.5" black aluminum voice coil former, high-roll surround, progressive spider, vented motor design, and stitched Mini-XL tinsel leads for reliable performance and durability. With 12mm of Xmax and a compact 4.3" mounting depth, the HZS 12" is designed for installations where available space is limited while still providing strong low-frequency output. Its bolt-through motor assembly adds mechanical strength, while the vented motor gap and solid pole piece help support thermal performance during extended operation. Key Features High-Output 12" Subwoofer – Delivers 500W RMS and 1,000W peak power handling for powerful low-frequency performance Shallow-Mount Design – 4.3" mounting depth allows installation in space-restricted applications Dual 4-Ohm Voice Coil – Provides flexible wiring and amplifier matching options 2.5" Black Aluminum Voice Coil Former – Designed for reliable power handling and improved heat dissipation 12mm Xmax – Provides controlled cone excursion for strong and responsive bass output High-Roll Surround – Supports smooth, controlled cone movement during high excursion Progressive Spider – Provides controlled suspension and consistent performance Vented Motor Gap and Solid Pole Piece – Helps improve heat dissipation during extended operation Stitched Mini-XL Tinsel Leads – Designed for long-term durability and reliable performance Bolt-Through Motor Assembly – Adds mechanical strength and structural durability Space-Saving Profile – Designed for shallow enclosures, truck applications, stealth builds, and other space-limited installations Ported Enclosure Optimized – Designed for efficient output in properly designed ported applications Sealed Enclosure Compatible – Supports sealed enclosure installations when space or system requirements call for it Horizon HZS Series – Engineered for powerful bass performance while maintaining a compact installation profile Specifications Model: HZS 12 Series: Horizon HZS Subwoofer Size: 12" Subwoofer Type: Shallow-Mount Subwoofer Voice Coil Configuration: Dual 4 Ohm Power Handling RMS: 500 Watts Power Handling Peak: 1,000 Watts Voice Coil Diameter: 2.5" Voice Coil Former: Black Aluminum Xmax: 12 mm Sensitivity: 87.4 dB (1W/1m) Resonant Frequency (Fs): 32.8 Hz Electrical Resistance (Re): 6.85 Ohms Qms: 3.2400 Qes: 0.5640 Qts: 0.4800 Equivalent Volume (Vas): 56.700 L Moving Mass (Mms): 182.05 g Compliance (Cms): 0.13 mm/N BL: 21.340 T·m Effective Cone Area (Sd): 735.5 cm² Displacement: 0.05 cu. ft. Mounting Depth: 4.3" Outside Diameter: 12.5" Cutout Diameter: 11.2" Motor Diameter: 6.15" Recommended Sealed Enclosure: 1.0 cu. ft. Recommended Port Area: 26 sq. in. 4th Order Sealed Enclosure: 0.75 cu. ft. 4th Order Ported Enclosure: 2.25 cu. ft. 4th Order Port Area: 15 sq. in. 4th Order Port Length: 6" Speaker Quantity: 1 Subwoofer Package Includes 1 × Sundown Audio Horizon HZS 12" Shallow-Mount Subwoofer 1 × Owner's/Installation Documentation SKU: SUN-HZS12D4 UPC: 810111135962