DS18 FX-1 Flush Mount / Surface Mount 1 Channel Monoblock Class D Amplifier With Acrylic Cover for Custom Installation 1 X 900W RMS @1 Ohm

The DS18 FX-1 is a 1-channel digital Class D monoblock amplifier with an acrylic cover, designed for compact, high-power subwoofer duty and flexible flush or surface mounting via the included adapter. Built for bass enthusiasts, it combines strong output with space-efficient installation and visual LED feedback through a Built-In Digital Light Module.

• 1-Channel Monoblock Amplifier: Dedicated, high-current output for a single subwoofer to deliver tight, impactful bass in a small footprint.
• Digital Class D: Efficient switching design that preserves power while reducing heat, useful in tight spaces and multi-amp installs.
• RMS Power @ 4Ω / 2Ω / 1Ω: 400W @ 4Ω, 650W @ 2Ω, 900W @ 1Ω; power scales with impedance to match your subwoofer and maximize headroom.
• Total Peak Power: 2700W peak for strong transient bass bursts without overstressing the amp during demanding passages.
• Flush or Surface Mounting (Adapter): Installation flexibility to suit limited dash, door, or panel spaces and achieve a clean, integrated look.
• Acrylic Cover: Protective, stylish cover that helps guard the amplifier in exposed installations while maintaining visibility into the build.
• Bass Knob Included: Handful control to fine-tune bass output from the driver seat to match preference or room response.
• LED Lighting Module: Built-in digital light module drives the frame LEDs for visual feedback and aesthetic impact during tuning.
• Low Pass Filter: Fixed LPF with a 50–250 Hz range to ensure the sub receives only the intended low-frequency content.
• Infrasonic Filter: 10–50 Hz filter helps protect the woofer from ultra-low content and excessive excursion.
• Bass Boost: 0–12 dB at 50 Hz to add controlled low-end punch when needed.
• Phase Selector: 0/180-degree phase options to align the sub with the rest of the system for coherent bass.
• Input Impedance: 30 kΩ input impedance to minimize signal loss and compatibility with a wide range of source devices.
• Remote Level Control & Clip Indicator: Remote control for on-the-fly level adjustments with a visual clip indicator to prevent distortion.
• Power & Terminals: 4 AWG power input, 80A fuse (2x40A), and direct insert power/speaker terminals for clean, secure wiring.
• Operating Range & Protections: 8.8–15.9V input range with thermal, over-load, DC output, short-circuit, and clipping protections for reliability.
• Finish & Durability: Black aluminum chassis with IP65 coating and anti-corrosion protection for harsh environments.
• Water Exposure Note: The FX Series adapters are not designed to be water-resistant; avoid water contact with the digital LEDs to prevent short circuits.
• Applications: Ideal for installations on ATV/RV roofs, boat walls, car audio panels, or racks where space and mounting versatility matter.

In a real car build, the FX-1 excels as a high-output, space-conscious sub amp with flexible mounting, robust protection, and tuning features that let you dial in bass precisely to your vehicle and listening preferences. Its 1 Ω RMS capability and efficient Class D design provide strong, controlled bass without excessive heat, while the flush/surface mounting option and included bass knob simplify installation and daily usability across diverse environments.