SDX-100.4
SUNDOWN AUDIO
SDX-100.4
SDX-100.4
4-Channel Weatherproof Amplifier, 100W RMS Per Channel, Sealed Control Cover, Cast Aluminum
Free Shipping
Features
- 100W x 4 at 4 ohms, 135W x 4 at 2 ohms, 270W x 2 bridged
- Water-resistant design with a removable sealed control cover
- Heavy cast aluminum heat sink sheds heat and blocks the elements
- Variable 12dB high and low pass filters with x1/x20 multipliers
- DC auto-sensing turn on removes the need for a remote wire
Couldn't load pickup availability
What's Included in the box
- SDX-100.4 4-Channel Weatherproof Car Amplifier
SKU: SKU: SDX 100.4
View full details






Product Description
The water resistance is not a marketing claim bolted onto a car amp. A heavy cast aluminum casing sheds heat and shields the electronics, and the full set of audio controls sits beneath a sealed, removable cover, so rain, dust, and spray stay out of the adjustment pots. Unscrew the badge with an allen key when you need to make changes.
That makes it a match for side-by-sides, UTVs, ATVs, boats, Jeeps with the top off, golf carts, and any car where the amp mounts somewhere exposed. It works just as well in a sealed trunk install.
Crossover flexibility is wide. Channels 1-2 have a variable 12dB high pass filter covering 15 Hz to 500 Hz or 300 Hz to 10 kHz. Channels 3-4 have a variable 12dB high pass from 15 Hz to 500 Hz and a variable 12dB low pass from 30 Hz to 500 Hz or 600 Hz to 10 kHz, with x1/x20 frequency multipliers. Variable 12dB bass boost at 50 Hz is on board.
DC auto-sensing turn on removes the need for a remote wire, and protection circuitry covers thermal, voltage, speaker short, and DC-offset faults. A 50A fuse is recommended. An optional wired remote is available.
Features
-
Built For Open-Air Vehicles
Water-resistant construction and a sealed control cover keep rain, dust, and spray out of the adjustment pots on UTVs, boats, and open Jeeps.
-
Power For Four Speakers
Rated 100W x 4 at 4 ohms and 135W x 4 at 2 ohms, it has the headroom to run a full set of speakers over engine and wind noise.
-
Crossovers For Any Setup
Variable high and low pass filters with x1/x20 multipliers reach from 15 Hz up to 10 kHz, covering subs, midbass, and horns from one amp.
-
Heat Handled By The Chassis
A heavy cast aluminum heat sink moves heat out of the amplifier, so long sessions in direct sun do not end in thermal shutdown.
-
Simpler Wiring
DC auto-sensing turn on means no remote turn-on lead to run, which cuts one wire out of a powersports or marine install.
Technical Specifications
- Product Type 4-Channel Weatherproof Car Amplifier
- Amplifier Type 4 Channel Weatherproof Class D
- 4 Ohm RMS Power 100 x 4; 270 x 2 Bridged
- 2 Ohm RMS Power 135 x 4
- Variable 12dB High Pass Filters 15 Hz - 500 Hz or 300 Hz - 10 kHz (Ch. 1-2); 15 Hz - 500 Hz (Ch. 3-4)
- Variable 12dB Low Pass Filters 30 Hz - 500 Hz or 600 Hz - 10 kHz (Ch. 3-4)
- Crossover Multipliers x1/x20
- Bass Boost Variable 12dB @ 50 Hz
- Turn On DC Auto-Sensing
- Water Resistance Water Resistant
- Heat Sink Heavy Cast Aluminum
- Control Cover Removable and Sealed
- Signal / Noise Ratio Greater Than 78 dB
- Protection Circuitry Thermal, Voltage, Speaker Short, DC-Offset
- Remote Optional Wired Remote
- Operating Voltage 11.5V - 15V
- Recommended Fuse 50A
- Dimensions 8.875" L x 7" W x 2.125" H