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

Free shipping is available within the 48 U.S. states. Orders placed before 11 PM ET are typically processed the next business day and arrive within 5–8 business days. Tracking information will be provided as soon as your order ships.

Need to make a change to your order? Contact us within 24 hours of purchase, and we'll be happy to help. Please note that orders already processed for shipment cannot be canceled.

1-Year Limited Warranty: As an authorized dealer, we provide a 1-year limited warranty covering manufacturer defects in materials and workmanship under normal use. The warranty does not cover physical damage, misuse, improper installation, or normal wear and tear.

Customer Support : 9:00 am to 5:00 pm 

Address: 13446 Alondra Boulevard, Cerritos ,California 90703, United States

Email: info@eliteautogear.com

For technical support questions, contact us at cs@eliteautogear.com

Phone: (877)-215-8187