Sundown Audio HZ-80.4 | Horizon Series 4-Channel Full-Range Amplifier (80W x4)

Versatility Meets Clarity.

The HZ-80.4 is your go-to solution for adding clean, controlled power across your mids and highs. With 80 watts RMS x 4 channels at 4 ohms, it’s the perfect amp for speaker upgrades, active component setups, or small subwoofers that need headroom without the distortion. This amp runs cool and clean — and with its compact chassis, it fits just about anywhere.

The Horizon Series amps don’t cut corners. This model includes adjustable high and low pass filters on all four channels, a full-range passthrough option, and high-level input capability to simplify factory integration. Run it passive or active — bridge it for bigger loads — the HZ-80.4 gives you maximum control and Sundown-grade output from a surprisingly small form factor.

Whether you’re upgrading a factory system or building something fresh, the HZ-80.4 gives your sound system the foundation it needs to shine. Clean mids, crisp highs, tight control. 

Specs:

• RMS Power @ 14.4V
  • 4 Ohm: 80W x4
  • 2 Ohm: 130W x4
• High Pass Filter (CH1-4): 27Hz – 250Hz
• Low Pass Filter (CH1-4): 27Hz – 250Hz
• Input Sensitivity: Up to 6V
• Signal-to-Noise Ratio: 95dB
• Fuse Rating: 50A
• Dimensions: 7.4" x 4.63" x 2.2"
• Weight: 2.54 lbs (1.15 kg)