Sundown Audio HZ-900.5 | Horizon Series 5-Channel Amplifier (900W RMS)

Everything You Need. Nothing You Don’t.

The HZ-900.5 is Sundown’s all-in-one solution for full-system amplification. With four channels dedicated to mids and highs and a separate subwoofer channel, this 5-channel amp offers up to 150W x4 @ 2 ohms on CH1-4, and 500W @ 2 ohms on CH5. It’s perfect for anyone who wants a single, clean install that powers an entire soundstage — from vocals to the deepest bass.

Advanced crossovers let you independently dial in your full-range and subwoofer sections. You get high-pass filters for CH1-4, and both low pass and subsonic filters on CH5. Add in DC Sense, high-level input capability, and Sundown's bulletproof 4-way protection, and you’ve got one of the most versatile and powerful compact amps in its class.

Ideal for daily drivers, stealth builds, or any vehicle where space matters but sound can't be compromised, the HZ-900.5 is as smart as it is strong.

Specs:

• RMS Power @ 14.4V
  • CH1-4: 100W x4 @ 4Ω / 150W x4 @ 2Ω
  • CH5 (Sub): 200W @ 4Ω / 500W @ 2Ω
• High Pass Filter (CH1-4): 27Hz – 250Hz
• Low Pass Filter (CH5): 50Hz – 250Hz
• Subsonic Filter (CH5): 10Hz – 50Hz
• Input Sensitivity: 6V Max
• Signal-to-Noise Ratio: 95dB
• Fuse Rating: 100A
• Dimensions: 11.25" x 4.63" x 2.2"
• Weight: 4.12 lbs (1.87 kg)