• Clean 4-Channel Power for Mids and Highs: The HZ-80.4 delivers 80 watts RMS per channel at 4 ohms, providing clear, controlled full-range power for door speakers, components, and active systems without distortion.
• Flexible Full-Range Amplifier Design: Produces 130 watts RMS x4 at 2 ohms and supports bridgeable channels, making it ideal for speaker upgrades, active component setups, or compact subwoofer applications.
• Fully Adjustable Crossovers on All Channels: Independent high-pass and low-pass filters from 27Hz to 250Hz allow precise system tuning for a wide range of vehicle and speaker configurations.
• Easy Factory Radio Integration: High-level input capability allows direct connection to factory head units without additional adapters, simplifying OEM system upgrades.
• Compact, Reliable Sundown Audio Performance: Built with efficiency and durability in mind, the Horizon HZ-80.4 runs cool, installs easily in tight spaces, and delivers the clean output Sundown is known for.

Sundown Horizon Compact 4-Channel 320 Watt RMS 4-Ohm Car Audio Amplifier HZ-80.4

This Listing Includes

• (1) Sundown Horizon 4-Channel Amplifier HZ-80.4

The HZ-80.4 is built to deliver clean, controlled power exactly where your system needs it. Pushing 80 watts RMS x4 @ 4 ohms, this compact 4-channel amplifier is ideal for speaker upgrades, active component systems, or small subwoofer duties that demand headroom without distortion. It runs cool, stays efficient, and fits almost anywhere—no gymnastics required.

Designed with real-world installs in mind, the Horizon Series refuses to cut corners. The HZ-80.4 features fully adjustable high-pass and low-pass filters on all channels, a full-range passthrough, and high-level inputs for seamless factory integration. Run passive or active, bridge it for more output, or keep it surgical and precise—the control is yours.

Whether you’re upgrading a factory system or building something fresh from the ground up, the HZ-80.4 lays a rock-solid foundation: clean mids, crisp highs, tight control—all in a surprisingly small footprint.

Features

• 4-channel full-range amplifier


• 80W RMS x4 @ 4 ohms


• 130W RMS x4 @ 2 ohms


• Bridgeable for higher-output applications


• Adjustable high-pass and low-pass filters on all channels


• High-level input capability for factory radio integration


• Compact design for easy installation


• Efficient, cool-running operation

Specifications:

• RMS Power (@ 14.4V): 80W x4 @4-Ohms


• RMS Power (@ 14.4V): 130W x4 @2-Ohms


• High Pass Filter (CH 1–4): 27Hz – 250Hz


• Low Pass Filter (CH 1–4): 27Hz – 250Hz


• Input Sensitivity: Up to 6V


• Signal-to-Noise Ratio: 95dB


• Fuse Rating: 50A


• Weight: 2.54 lbs (1.15 kg)

Dimensions:

• Length: 7.4"


• Width: 4.63"


• Depth: 2.2"