We are a JL Audio authorized dealer so you get up-to-date, fully warrantied products.
What's Inside?
•4-Channel amplifier
•2.5mm Allen wrench
•Self-adhesive JL Audio badge
•Owner's Manual
Powerful and High-quality Audio Output
Under JL Audio's mid-tier RD Series amplifier line, the RD400/4 is a 4-channel car amplifier capable of powering up your car speakers and subwoofers simultaneously with its full-range frequency reproduction capacity. Even with its small aluminum body, your car audio system can still be at its best because of its powerful and high-quality audio output.
Distortion Produced From Supply Voltage Fluctuation
The amplifier employs JL Audio's renowned NeXD Switching Technology, which uses a self-oscillating modulator that is designed to cancel out the distortion produced from supply voltage fluctuation. With its Class-D amplifier that enables it to produce a massive power output, the NexD Switching Technology is a big help in maintaining the amplifier's performance in delivering high-quality audio with minimal distortion.
Dedicated Bass Channel
It has variable low and high-pass filter controls for shaping the audio quality to what you want to hear. If you also want to use a pair of subwoofers, you can change the amplifier's settings from a four-channel mode into a two-channel mode to have a dedicated bass channel for your subs.
The JL Audio RD400/4 can handle a power output of 75 Watts RMS per channel at 4 ohms and 100 Watts RMS per channel at 2 ohms. When in bridge mode, the amplifier produces a power output of 200 Watts RMS per channel at 4 ohms. Its frequency response of 12 Hz up to 22 kHz gives the amplifier an extensive full-range production with excellent audio quality and minimal distortion.
Standard Equipment
Automatic turn-on capability (via signal sensing or DC-offset sensing) is standard equipment, along with all-new input type switches for bridging of stereo output channels without needing to use Y-adaptors. Onboard LED-clipping indicators are also included with your RD400/4.
| Brand | JL Audio |
| RMS Power Output (Watts x Channels) | 75 x 4 |
| Peak Power Output (Watts x Channels) | N/A |
| Power at 2 Ohms (Watts x Channels) | 100 x 4 |
| Bridged Power (Watts x Channels) | 200 x 2 |
| Minimum Impedance Bridged | 4 |
| Minimum Impedance Unbridged | 2 |
| Minimum Impedance | 2 |
| Amplifier Class | D |
| Low-Pass Crossover Frequency | 50-500 Hz |
| Low-Pass Slope (dB/octave) | 12 dB/oct |
| High-Pass Crossover Frequency | 50-500 Hz |
| High-Pass Slope (dB/octave) | 12 dB/oct |
| Best Frequency Response | 12-22k Hz |
| THD at Rated RMS Power | 0.01 |
| Signal to Noise Ratio | 84 dB |
| Input Voltage | 14.4v |
| Bass Boost | No |
| Bass Boost Frequency | N/A |
| Fan Cooled | No |
| Fuse Rating | 40 |
| Speaker Level Inputs | Yes |
| Preamp Outputs | 2 |
| Width (inches) | 9 13/16" |
| Height (inches) | 2 1/8" |
| Depth (inches) | 7" |
| Parts Warranty | 1 Year |
| Labor Warranty | 1 Year |
