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
Key features
- Amplifier channels: 1
- RMS output at 4 ohms: 400.0 W
- RMS output at 2 ohms: 650 W
- RMS output at 1 ohm: 900 W
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 is backordered and will ship as soon as it is back in stock.
Description
Description
Product Overview
Add a dedicated subwoofer channel to a custom audio system with the DS18 FX-1, a compact Class D monoblock amplifier rated for 900W RMS at 1 ohm. Its acrylic cover, built-in digital light module, and flush- or surface-mount options suit installations where space and appearance both matter.
Key Features & Benefits
- Three RMS power ratings: Choose from 400W at 4 ohms, 650W at 2 ohms, or 900W at 1 ohm to match your subwoofer’s impedance.
- Flexible mounting: Use the included adapter for flush or surface mounting in a custom installation.
- Remote level control: Adjust bass from the driver’s seat and use the clip indicator to help monitor signal clipping.
- Adjustable bass settings: Set the low-pass and infrasonic filters, bass boost, and phase to tune the subwoofer’s signal.
- Visible design: The acrylic cover and built-in digital light module show off the amplifier’s frame LEDs.
Technical Specifications
| Specification | Details |
|---|---|
| Brand and model | DS18 FX-1 |
| Amplifier type | 1-channel digital Class D monoblock |
| RMS power | 400W @ 4Ω; 650W @ 2Ω; 900W @ 1Ω |
| Total peak power | 2700W peak |
| Mounting | Flush or surface mount via included adapter |
| Cover | Acrylic |
| Bass knob | Included |
| Lighting | Built-in digital light module for frame LEDs |
| Low-pass filter | Fixed LPF, 50–250 Hz |
| Infrasonic filter | 10–50 Hz |
| Bass boost | 0–12 dB at 50 Hz |
| Phase selector | 0/180 degrees |
| Input impedance | 30 kΩ |
| Remote control and indicator | Remote level control with clip indicator |
| Power input | 4 AWG |
| Fuse | 80A (2x40A) |
| Terminals | Direct insert power/speaker terminals |
| Input voltage range | 8.8–15.9V |
| Protections | Thermal, over-load, DC output, short-circuit, and clipping protections |
| Chassis and finish | Black aluminum chassis with IP65 coating and anti-corrosion protection |
| Water exposure note | FX Series adapters are not designed to be water-resistant; avoid water contact with the digital LEDs to prevent short circuits. |
| Applications listed | ATV/RV roofs, boat walls, car audio panels, and racks |
Why Choose This Product?
The FX-1 combines a single subwoofer channel with mounting flexibility and onboard tuning controls. Its Class D design and compact format are suited to custom builds where installation space is limited.
Use the remote level control to adjust output from the driver’s seat, then use the filter, bass boost, and phase settings to shape the subwoofer signal for your system.
Installation & Compatibility Notes
Confirm that your subwoofer’s impedance matches an available rating: 4Ω, 2Ω, or 1Ω. Plan for the 4 AWG power input, 80A fuse, and direct insert power and speaker terminals.
The product is described for custom installations on ATV/RV roofs, boat walls, car audio panels, or racks. Keep water away from the digital LEDs; the FX Series adapters are not designed to be water-resistant.
Frequently Asked Questions
How much RMS power does the DS18 FX-1 produce?
It is rated at 400W RMS at 4Ω, 650W RMS at 2Ω, and 900W RMS at 1Ω.
What does the 2700W peak rating mean?
The listed total peak power is 2700W. The RMS ratings are listed separately by impedance.
Can I flush-mount or surface-mount this amplifier?
Yes. The FX-1 supports both mounting options via its included adapter.
Can the amplifier be exposed to water?
The FX Series adapters are not designed to be water-resistant. Avoid water contact with the digital LEDs to prevent short circuits.
What tuning controls are built in?
The FX-1 has a 50–250 Hz fixed low-pass filter, a 10–50 Hz infrasonic filter, 0–12 dB bass boost at 50 Hz, and a 0/180-degree phase selector.
Explore More
Shop the DS18 FX-1 at 12 Volt Outlet. Want to learn more about DS18? Explore our DS18 brand profile.
