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Home/Equipment/Amplifiers/Sundown Audio/SFB-1800.5 5-Channel Amplifier
Sundown Audio SFB-1800.5D Amplifier - 5-Channel, Class D, non-bridgeable - Black ribbed aluminum chassis, multiple RCA inputs, compact design.
Sundown Audio/Amplifier

SFB-1800.5 5-Channel Amplifier

1,000 x 1 @ 1 ohm RMS (Ch. 5) 300 x 4 (Ch. 1-4) + 500 x 1(Ch. 5) @ 2 ohms RMS 200 x 4 (Ch. 1-4) + 250 x 1(Ch. 5) @ 4 ohms RMS 5-channel full-range amplifier Variable 12dB low pass filter: 50Hz – 6kHz (Ch. 1-4) Variable 12dB low pass filter: 50Hz – 20kHz (Ch. 5) Variable 12dB high pass filter: 15Hz – 6kHz (Ch. 1-4) Variable 12dB high pass filter: 50Hz – 1kHz (Ch. 5) 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 Full Bridge for your full system! The “Brazilian Style” SFB packs a powerful punch in a compact size, with a bass channel stable down to 1 ohm. 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, plus a dedicated powerhouse for a sub channel. 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 150A Dimensions 8.86″ x 11.81″ x 2.70″
Used in 0 builds
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Specifications

class
D
channels
5
Compare Prices(2 retailers)
Sparked Innovations
Sparked InnovationsBest Price
Available
$499.99
Updated 3/24/2026
S
Sparked InnovationsBest Price
Available
$499.99
Updated 3/22/2026
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Frequently Asked Questions

What is the Sundown Audio SFB-1800.5 5-Channel Amplifier?

The Sundown Audio SFB-1800.5 5-Channel Amplifier is a car audio equipment made by Sundown Audio. View full specifications and where to buy on this page.

How much does the Sundown Audio SFB-1800.5 5-Channel Amplifier cost?

The Sundown Audio SFB-1800.5 5-Channel Amplifier typically sells for $400 to $500 depending on the retailer and variant. Check the "Where to Buy" section for current pricing from authorized dealers.

Where can I buy the Sundown Audio SFB-1800.5 5-Channel Amplifier?

You can purchase the Sundown Audio SFB-1800.5 5-Channel Amplifier from authorized dealers listed in the "Where to Buy" section on this page. We recommend buying from authorized retailers to ensure warranty coverage and genuine products.

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