Description
DS18 FRP-4K4/RD
The FRP‑4K4/RD is a powerful 4‑channel Class D full‑range car audio amplifier designed to deliver up to 4000 W RMS of clean and consistent power across your vehicle’s sound system. With an efficient digital design and compact footprint, this amplifier provides high output stability down to 1 Ω per channel and can be bridged into two stronger outputs for powered pairs or pro‑audio setups. It includes adjustable high‑pass, low‑pass, and full‑range crossovers with a bass boost control to fine‑tune your sound, along with a smart cooling fan and robust protection systems for safe, reliable performance. Ideal for powering speakers, mids, and tweeters in advanced audio systems.
Specifications
| Specification | Value |
|---|---|
| RMS Power @ 4 ohms | 4 × 400W |
| RMS Power @ 2 ohms | 4 × 700W |
| RMS Power @ 1 ohm | 4 × 1000W |
| RMS Power @ 4 ohm Bridge | 2 × 1200W |
| RMS Power @ 2 ohm Bridge | 2 × 1800W |
Audio Specifications
| Specification | Value |
|---|---|
| Frequency Response | 10Hz – 20kHz |
| Signal to Noise Ratio | 90dB |
| Efficiency @ 4 ohm | 97% |
| Damping Factor | 90 |
| Input Impedance | 10kΩ |
| Channel Separation | 50dB |
| Total Harmonic Distortion (THD) | 0.5% |
| Low Level Input Range | 400mV – 6V |
| High Level Input | No |
| Selectable X-Over | HPF / FULL / LPF |
| X-Over Filter Range | 10Hz – 2kHz |
| Bass Boost Range | 0 – 12dB |
| Bass Boost Frequency | 50Hz |
| Phase Selector | No |
Features
| Specification | Value |
|---|---|
| Amplifier Class | Digital |
| Amplifier Type | Full-Range Multi-Channel |
| Number of Channels | 4CH |
| Minimum Impedance | 1 ohm Stereo / 2 ohm Bridge |
| LED Indicator | Power / Protect / Clipping |
| Power Input Terminal Size | 0GA |
| Fuse Size (Recommended) | 500A |
| Cooling Fan | Yes (Smart Cooling × 1) |
| Voltmeter | No |
| Thermal Protection | Yes |
| Over-Load Protection | Yes |
| DC Output Protection | Yes |
| Short Circuit Output Protection | Yes |
| Voltage Input Protection | Yes |
| Clipping Protection | Yes |
| Body Color / Finish | Blue / Red / Titanium |
| Compact Size for Easy Installation | Yes |
| Stable / Reliable Four Layers PCB Design | Yes |
| Surface Mount Component Technology | Yes |
| Quality Control Verification using Audio Precision Instruments | Yes |
| Tiffany RCA Terminal | Yes |
| LED Clip Indicator | Yes |
| Metal Knobs with Click Steps | Yes |
| Input Selector | Yes (2ch / 4ch) |
| Remote Level Control with Clip Indicator | No |
| Remote Level Control with Clip Indicator and Voltmeter | No |
Measurements
| Measurement | Value |
|---|---|
| Overall Length | 13.4″ / 340mm |
| Overall Width | 5.5″ / 140mm |
| Overall Height | 2.4″ / 63.5mm |
| Heatsink Length | 12″ / 307mm |
| Gross Single Unit Weight | 3.2kg |
Product Overview
FULL RANGE POWER IS BACK! AND NOW IN 4-CHANNELS!
The FRP-4K4 is DS18’s most powerful compact 4-channel amplifier yet, built to deliver up to 4000W of RMS power across your entire system!
Built for Massive Output
The FRP-4K4 delivers massive output: 4 x 400W at 4 ohm, 4 x 700W at 2 ohm, 4 x 1000W at 1 ohm, 2 x 1200W bridged at 4 ohm, or 2 x 1800W bridged at 2 ohm. Plenty of clean, consistent power for your full-range or pro audio builds.
Full Audio Control
Dial in your sound with fully adjustable high-pass, low-pass, and full-range crossovers, plus a 12dB bass boost at 50Hz to fine-tune your low end. Smart Cooling keeps temps down while built-in protection circuits and 0GA power terminals make setup and system management simple—even when pushed to the limit.
Get DS18’s FRP-4K4 for clean full-range power without wasting space!
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