JL Audio RD400/4 – Premium 4-Channel Car Amplifier Performance
The car amplifier is the heart of any serious audio system. The JL Audio RD400/4 brings power, clarity, and flexibility to your car’s sound setup. This compact and efficient 4-channel amplifier delivers clean sound and deep impact without overloading your electrical system. It’s an ideal upgrade for those who demand more from their in-vehicle listening experience.
JL Audio's RD400/4 4-channel amplifier will power each your car's front and rear speakers with 75 watts RMS, so you'll hear and feel your music clearly over the whistle of the wind and rumble of the road. For driving bass, you can switch the RD400/4 to 2-channel mode and run a couple of subwoofer with up to 200 watts RMS each.
🔧 Why Choose This Car Amplifier?
The RD400/4 provides 75 watts RMS to each of four channels at 4 ohms, making it great for front and rear speakers. You can also bridge the channels to deliver 200 watts RMS x 2 at 4 ohms—perfect for powering subwoofers.
JL Audio’s NexD™ Class D amplifier technology allows for high power output with minimal current draw. This design reduces strain on your vehicle’s electrical system while ensuring consistent audio quality. It’s efficient, powerful, and ideal for both casual drivers and audiophiles.
🎚️ Key Features of This Amplifier
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75W RMS x 4 @ 4 ohms; 100W RMS x 4 @ 2 ohms
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200W RMS x 2 bridged @ 4 ohms
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NexD™ Class D design for low current draw
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Differential-balanced inputs to reduce signal noise
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Variable high- and low-pass filters (50-500 Hz)
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LED clip lights for easy gain setup
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Compatible with factory and aftermarket stereos
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Speaker- and preamp-level inputs
📦 Built for Easy Integration
This car amplifier offers differential-balanced inputs that eliminate noise and interference. It works with almost any source unit, including factory radios. Auto turn-on functions allow simple integration with stock systems. You won’t need a remote wire or RCA outputs.
The amplifier also includes variable crossovers and bass management. These controls let you fine-tune each channel’s output. You can match speaker performance and optimize sound delivery easily.
💡 Sleek, Compact, and Smart Design
The RD400/4 features a sturdy, compact chassis measuring just 9-13/16" x 2-1/8" x 7". It fits under seats or in tight trunk spaces. A removable cover hides the control panel, offering a clean and tamper-resistant look.
The blue LED accent lighting adds a stylish touch. It’s subtle yet effective, enhancing the amp’s modern appearance.
🔌 Safe and Reliable Installation
While this amp does not include onboard fuses, JL Audio recommends using a 40-amp inline fuse. When installed with multiple amps, a distribution block with individual fuses helps keep your setup safe.
Use 4-gauge power and ground cables for best results. Always consult an expert or follow guidelines to ensure a safe, high-performance installation.
For a wider selection of amplifiers and accessories, visit our car amplifier collection. Our experienced team can guide you to the perfect match for your system.
🚗 Upgrade Your Ride Today
Ready to boost your vehicle’s audio system? The JL Audio RD400/4 car amplifier gives you the performance and flexibility needed for a customized sound experience. Whether you're after thunderous bass or clean mids and highs, this amp delivers it all.
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❓ Frequently Asked Questions (FAQ)
Q1: Can this amplifier power subwoofers?
Yes. In bridged mode, it outputs 200W RMS x 2 for subwoofers.
Q2: Will it work with factory radios?
Yes. It supports both speaker-level and preamp-level inputs.
Q3: Does it require external fuses?
Yes. Use a 40-amp inline fuse for safe operation.
The JL Audio RD400/4 car amplifier stands out with its compact size, strong performance, and advanced features. It’s the ultimate choice for clean sound, flexibility, and system compatibility. Get yours at Audio Jam and experience the difference in your drive.
