Sundown Audio SUN-HZS10D4 Horizon HZS 10″ 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 10" 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 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 10" 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 3.9" mounting depth, the HZS is designed for installations where space is limited while still providing the deep bass performance expected from Sundown Audio. The HZS Series is optimized for ported enclosures while also supporting sealed enclosure applications. Key Features High-Output 10" Subwoofer – Delivers 500W RMS and 1,000W peak power handling for powerful low-frequency performance Shallow-Mount Design – 3.9" 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 thermal performance 12mm Xmax – Allows controlled cone excursion for strong and responsive bass output High-Roll Surround – Supports smooth cone movement and long-term durability Progressive Spider – Provides controlled suspension and consistent performance during high excursion Vented Motor Design – Helps improve cooling and heat dissipation during extended operation Stitched Mini-XL Tinsel Leads – Designed for durability and reliable performance under demanding conditions Bolt-Through Motor Assembly – Provides additional mechanical strength and structural durability Space-Saving Profile – Designed for shallow enclosures, truck applications, stealth builds, and other installations with limited depth Ported Enclosure Optimized – Designed to provide strong output in properly designed ported enclosures Sealed Enclosure Compatible – Can also be installed in sealed enclosure applications Horizon HZS Series – Engineered for powerful bass performance in compact and space-conscious installations Specifications Model: HZS 10 Series: Horizon HZS Subwoofer Size: 10" 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: 86.6 dB (1W/1m) Resonant Frequency (Fs): 44.5 Hz Electrical Resistance (Re): 6.85 Ohms Qms: 3.3200 Qes: 0.5780 Qts: 0.4920 Equivalent Volume (Vas): 19.250 L Moving Mass (Mms): 124.02 g Compliance (Cms): 0.10 mm/N BL: 20.280 T·m Effective Cone Area (Sd): 506.6 cm² Displacement: 0.04 cu. ft. Mounting Depth: 3.9" Outside Diameter: 10.3" Cutout Diameter: 9.2" Motor Diameter: 6.15" Recommended Sealed Enclosure: 0.5 cu. ft. Recommended Port Area: 15 sq. in. 4th Order Sealed Enclosure: 0.4 cu. ft. 4th Order Ported Enclosure: 1.2 cu. ft. 4th Order Port Area: 24 sq. in. 4th Order Port Length: 6"Shallow Package Includes 1 × Sundown Audio Horizon HZS 10" Shallow-Mount Subwoofer 1 × Owner's/Installation Documentation SKU: SUN-HZS10D4 UPC: 810111135948