Shallow Mount, High Output: The HZS-10 delivers 600W RMS despite its minimal 3.9" mounting depth. It's purpose-built for truck or under-seat installs, providing the powerful bass expected from Sundown in a space-saving package. Reliable Power Handling: Driven by a 2.5" black aluminum former Dual 4Ω voice coil. This robust coil ensures high thermal stability and sustained performance, making it reliable for daily use and high-volume playback. Advanced Thermal Management: The motor assembly uses a vented motor gap and solid pole piece. This design effectively dissipates heat from the voice coil, ensuring thermal efficiency and preventing power compression for consistent output. Precision Excursion Control: A high-roll surround and progressive spider ensure smooth, controlled cone movement. Stitched Mini-XL tinsel leads and a bolt-through motor design guarantee long-term durability and clean bass. Optimized for Small Enclosures: Performs best in space-restricted environments. The recommended Sealed Enclosure is just 0.5 cuft net. Physical dimensions are 10.3" OD and 9.2" cutout for easy, compact installation.

Sundown Audio Horizon HZS-10 Dual 4-Ohm Shallow Subwoofer

The Sundown Audio Horizon HZS-10 is engineered to deliver powerful, clean bass to space-limited installations without sacrificing output or reliability. Whether you’re working with a slim enclosure behind a truck seat, under a rear deck, or in a stealth build, the HZS delivers the intense low-end impact you expect from Sundown. It is the ideal shallow-mount solution when you want true 600W RMS performance without giving up precious install depth.

Core Power and Structural Features

• Powerful 600W RMS Handling: Features a robust 2.5" black aluminum former voice coil (Dual 4Ω) for high thermal stability and sustained power.

• Minimal 3.9" Mounting Depth: Purpose-built for shallow, space-restricted enclosures, making truck and small-space installs possible.

• Optimal Cooling: Uses a vented motor gap and solid pole piece to efficiently dissipate heat, ensuring thermal efficiency and consistent output.

• Acoustic Efficiency: Delivers efficient volume output with an 86.6 dB (1W/1M) Sensitivity rating.

Durability and Enclosure Flexibility 

• Superior Reliability: Features stitched Mini-XL tinsel leads and a bolt-through motor assembly for long-term durability and mechanical strength.

• Controlled Excursion: High-roll surround and progressive spider suspension ensure smooth, clean cone movement.

• Ideal Enclosure Specs: Optimized for performance in a compact 0.5 cuft net Sealed enclosure for tight, accurate bass, and is fully compatible with ported setups for maximum output.

• Mounting Dimensions: Easy to install with a 10.3" Outside Diameter and a 9.2" Cutout Diameter.

Experience the difference: The HZS-10 is built for daily abuse and combines strength, efficiency, and low-profile fitment into one aggressive package.