• 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"

Payment Information

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We are not responsible for any custom duties or brokerage fees that may apply for all international orders.

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All orders over $500 will require a signature for delivery.

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valid residential or commercial address within the Contiguous 48 United
States (PO Boxes address may require additional charges).

P.O. Boxes, APO/FPO addresses, Alaska, Hawaii, Puerto Rico, Guam,
U.S. Virgin Islands, Northern Mariana Islands, American Samoa, Canada,
and other countries may require additional shipping fees. Please contact
a member of our team for detailed shipping charges.

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to ship every package with-in 1 business day of receiving a cleared
payment. In some circumstances additional time may be need, in which
case we will contact buyer.

Shipped orders that are returned by the shipping company due to an
insufficient address or an undeliverable address will be refunded less a
20% restocking fee.

If package is refused or marked undeliverable and returned
back to us by the carrier, you will need to pay the shipping cost in
full to have the package sent back to you or we can refund the money
minus the cost of shipping

MISSING A PACKAGE?

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please do the following within 36 hours of expected, stated delivery:

Verify the shipping address on the order is the address where you are looking for the package

Look for a notice of attempted delivery

Look around the delivery location for the package, or see if a neighbor has accepted the delivery

Be sure to double check your mailbox and other usual spots for package delivery

If you think that your package has been stolen, we will require a police report since this is now theft.
Once we have a police report on file for the stolen package, we will reship your order.