The Sundown Audio SFB-3000D is a high-output mono car audio amplifier made for subwoofer systems that need serious RMS power from one compact Class D chassis. It supports 1-Ohm stable operation and pairs strong output with system tuning controls for daily driver, demo, and custom car audio builds.

This amplifier delivers 3000W RMS at 1 Ohm, 2000W RMS at 2 Ohms, and 1100W RMS at 4 Ohms, giving installers flexible wiring options for compatible subwoofer loads. A dual MOS-FET PWM power supply supports consistent output, while the recommended 250A fuse rating matches the amplifier's power demands.

Built-in tuning includes a 12 dB per octave variable low pass filter and 0 to 12dB variable bass boost for dialing in low-frequency response. Four-way protection covers thermal, voltage, speaker short, and DC offset conditions, and the smart three-speed temperature-activated fan helps manage heat during heavy playback.

Technical Highlights:
Power Output: 3000W RMS at 1 Ohm, 2000W RMS at 2 Ohms, 1100W RMS at 4 Ohms
Voltage Range: 10.5V to 15.5V DC working voltage
Signal Noise Ratio: 86dB rating
Size: 9.00 x 8.25 x 2.50 inches

The SFB-3000D is suited for car audio hobbyists, installers, and subwoofer owners building a single-amplifier bass system. Its mix of 1-Ohm power, wired remote with clipping indicator, protection circuitry, and compact size gives it a strong fit for high-power subwoofer setups without adding multiple amplifiers.

• Mono Class D Power: Digital Class D monoblock amplifier for car subwoofer systems; 1-Ohm stable load support; compact install-friendly layout
• High RMS Output: Delivers 3000W RMS at 1 Ohm; 2000W RMS at 2 Ohms; 1100W RMS at 4 Ohms; clear power ratings for matched subwoofer loads
• Tuning For Bass Systems: Variable 12 dB per octave low pass filter; 0 to 12 dB bass boost; shape low-frequency response for daily listening, demos, or custom builds
• Protection And Cooling: Four-way protection covers thermal, voltage, speaker short, and DC offset conditions; three-speed temperature-activated fan manages heat under heavy playback
• Install Ready Specs: Dual MOS-FET PWM power supply; wired remote with clipping indicator; 250A fuse rating; 86 dB signal noise ratio; 10.5V to 15.5V DC input; 9 x 8.25 x 2.5 inch chassis