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

The Sundown Audio SUN-HZS12D4 brings deep, punchy bass with 500W RMS (1,000W peak) of power handling in a 12-inch size.

At a glance

• Power: 500W RMS (1,000W peak)
• Size: 12"
• Impedance: 4 ohm

Details

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

Why buy from Stereo-Needs

• Free shipping on every order
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• Not sure it fits your vehicle or system? Call or text 951-497-3497 before you order