Description

DS18 FX4
Specifications
| Item | Specification |
|---|---|
| SKU | FX4 |
| Amplifier Class | Digital (Class D) |
| Amplifier Type | Stereo Full Range |
| Number of Channels | 4 |
| Total Watts (Peak) | 3000W |
| Minimum Impedance | 2Ω Stereo / 4Ω Bridge |
| Body Color / Finish | Black Aluminum |
| Waterproof Rating | IP65 (Flush Mounting) |
Power Output
| Configuration | RMS Power |
|---|---|
| @ 4 Ohm | 4 × 180W |
| @ 2 Ohm | 4 × 250W |
| @ 1 Ohm | N/A |
| @ 4 Ohm (Bridged) | 2 × 500W |
Audio Performance
| Parameter | Value |
|---|---|
| Frequency Response | 20Hz – 20kHz |
| Signal-to-Noise Ratio | 87 dB |
| Efficiency @ 4Ω | 79% |
| Damping Factor | 80 |
| Input Impedance | 28 kΩ |
| Channel Separation | 60 dB |
| Total Harmonic Distortion (THD) | 0.15% |
| Low Level Input Range | 0.3 – 6 V |
Crossover & Signal Control
| Feature | Specification |
|---|---|
| Selectable Crossover | LPF / HPF / FULL |
| Crossover Filter Range | 40 Hz – 2 kHz |
| Bass Boost Range | 0 – 12 dB |
| Bass Boost Frequency | 50 Hz |
| Infrasonic Filter | N/A |
| Phase Selector | N/A |
| High Level Input | N/A |
Features & Protection
| Feature | Availability |
|---|---|
| LED Indicator | Power / Protect / Clip |
| Thermal Protection | Yes |
| Over-Load Protection | Yes |
| DC Output Protection | Yes |
| Short Circuit Protection | Yes |
| Voltage Input Protection | Yes (8.5 – 16.8V) |
| Clipping Protection | Yes |
| Cooling Fan | No |
| Voltmeter | No |
| Remote Level Control | No |
Inputs & Connectivity
| Feature | Specification |
|---|---|
| Input Channel Selectable | Yes (2 / 4 Channels) |
| RCA Low Level Output | Yes |
| Tiffany RCA Connector | Yes |
| Power Input Terminal Size | 4 Ga |
| Fuse Size | 80A (2 × 40A) |
Construction & Design Features
| Feature | Included |
|---|---|
| Very High Efficiency Digital Circuit Design | Yes |
| Anti-Corrosion PCB Coating | Yes |
| Surface Mount Component Technology | Yes |
| Audio Precision QC Verification | Yes |
| Digital Chasing LED Adapter | Yes (Included) |
Dimensions & Weight
| Measurement | Value |
|---|---|
| Body Length | 9″ / 228 mm |
| Body Width | 4.7″ / 120 mm |
| Overall Height | 1.85″ / 47 mm |
| Heatsink Length | 10.8″ / 275 mm |
| Heatsink Width | 7.2″ / 182 mm |
| Mounting Hole Spacing | 9.2″ × 5.8″ / 233.7 × 147 mm |
| Mounting Depth | 1.5″ / 39 mm |
| Gross Weight (Single Unit) | 2.75 kg |
Product Overview
Experience the pinnacle of car audio performance with DS18’s FX4!
Designed and manufactured specifically for professional car audio applications, the FX4 combines high-quality sound and a compact footprint for effortless installation.
The FX Series from DS18 offers a unique advantage over standard amplifiers – the ability to be installed in both flush and surface applications. With the included surface mode adapter, the FX4 can seamlessly integrate into any custom car audio build, ensuring optimal performance without sacrificing space or style. Plus, this frame has Digital LED’s controlled by a Built-In Digital Light Module!
Featuring an IP65 water-resistant design (when flush mounted) and coated 4-layer PCB, this amplifier is built to withstand harsh conditions and prevent corrosion. The flush or surface installation mode makes it easy to install on ATV/RV roofs, boat walls, car audio panels, or racks, ensuring a clean and professional look.
With its stable and reliable Class D circuit design, LED clipping indicator for easier adjustment, selectable/variable crossovers, direct insert power and speaker terminals, and easy installation process, the FX4 is a true powerhouse in the world of car audio.
Delivering MAX power of 3000W and RMS power of 180W x 4 at 4 ohm, 250W x 4 at 2-ohm, and 500W x 2 at 4-ohm Bridge; the FX4 packs a powerful punch.
Elevate your car audio experience to new heights with DS18’s FX4!
*The FX Series adapters are not designed to be water-resistant. Please exercise caution to prevent water contact with the DIGITAL LED’S, as exposure may result in a short circuit*




























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