Sundown Audio SFB-500.4 Amplifier | 500W RMS X 4CH

Sundown Audio SFB-500.4 Amplifier | 500W RMS x 4CH

Power up your audio system with the Sundown Audio SFB-500.4, a versatile 4-channel full-range amplifier designed for exceptional performance. Delivering up to 500W RMS per channel at 1 ohm, this "Brazilian Style" amplifier is compact yet powerful, perfect for PA setups, marine systems, or high-quality speaker arrays.

With advanced features like variable 12dB high-pass and low-pass filters, bass boost, and comprehensive protection circuitry, the SFB-500.4 offers precise control and reliable operation. Built with performance and budget in mind, it's ideal for audiophiles seeking raw power in a compact form.

Key Features:

• Powerful Output: 500W x 4 @ 1 ohm, 300W x 4 @ 2 ohms, 200W x 4 @ 4 ohms.
• Flexible Sound Tuning: Variable high-pass (15Hz–6kHz), low-pass (50Hz–6kHz), and bass boost (12dB @ 50Hz).
• Built-In Protection: Thermal, voltage, speaker short, and DC-offset safeguards.
• Compact Design: Fits easily into tight spaces, perfect for versatile installations.
• Optional Remote Control: Includes a clipping indicator for real-time monitoring.

• 500 x 4 @ 1 ohm RMS
• 300 x 4 @ 2 ohms RMS
• 200 x 4 @ 4 ohms RMS
• 4-channel full-range amplifier
• Variable 12dB low pass filter: 50Hz – 6kHz
• Variable 12dB high pass filter: 15Hz – 6kHz
• Variable 12dB Bass Boost @ 50Hz
• Power, protection & clipping indicators included
• Thermal, voltage, speaker short, and dc-offset protection circuitry
• Optional wired remote control with clipping indicator

Introducing the Sundown Full Bridge line of amplifiers! The “Brazilian Style” SFB packs a powerful punch in a compact size, stable down to 1 ohm per channel.  Use the SFB to wire several speakers together on every channel - an ideal amp for a PA mid/high speaker array, a large marine system, or your favorite set of separates. If you are looking for raw power on a budget –  look no further!

Product Manual

Specifications

• Frequency Response: 10HZ-20KHZ(-3dB)
• Input Impedance: 56k ohms
• Input Sensitivity 5V Max
• S/N Ratio 100dB
• Minimum Supply Voltage: 9VDC
• Maximum Supply Voltage: 16VDC
• Working Voltage 10.5v-15.5v
• Recommended Fuse Rating 180A
• Dimensions 8.25″ x 9.75″ x 2.75″

Why Choose the SFB-500.4?

The Sundown Audio SFB-500.4 is perfect for those looking to power multiple speakers with crisp, clean sound. Whether you're enhancing your car audio, marine setup, or PA system, this amplifier delivers reliable performance and precise sound control. Compact yet robust, it's a budget-friendly choice for powerful audio solutions.