🔊 Clean Power for Your Entire System: JL Audio JD400/4 Car Amplifier 🎶
Want more sound clarity and punch without blowing your budget? The JL Audio JD400/4 car amplifier is a fantastic solution. With four channels of crystal-clear power, this amp boosts your entire system with performance and flexibility in a compact form.
Whether you’re powering door speakers or a full component setup, the JD400/4 offers plenty of headroom. Built by JL Audio—known for their high-performance engineering—the JD400/4 delivers professional results without the premium price tag.
🔌 Power That Brings Music to Life
This Class D car amplifier delivers 100 watts RMS per channel at 2 ohms and 75 watts at 4 ohms. You get consistent, distortion-free sound from all your speakers.
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100W RMS x 4 @ 2 ohms
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75W RMS x 4 @ 4 ohms
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200W RMS x 2 @ 4 ohms bridged
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Ideal for door speakers, tweeters, or mids
It’s powerful enough to fuel your full-range speakers and flexible enough for custom setups.
🎚️ Advanced Controls for Custom Tuning
Dial in the exact tone you want with built-in adjustable filters. Whether you're driving coaxial or component speakers, the JD400/4 car amplifier adapts to your system.
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Variable high- and low-pass filters (50–500 Hz)
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Independent controls for front and rear channels
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Optional bass boost with RBC-1 (sold separately)
Tuning is easy and precise, helping you shape your perfect soundstage.
💡 Clipping Indicator for Safe Setup
Protect your system with JL Audio’s signature clipping indicator. It ensures you set gain levels correctly, avoiding distortion and potential damage.
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LED signal clipping lights for each channel pair
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Simple gain matching to source unit
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Professional-quality sound without trial and error
Even beginners can tune confidently.
🧩 Compact and Install-Friendly
The JD400/4 features a space-saving design for versatile installation. Its rugged build fits under seats, inside consoles, or on trunk panels.
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Dimensions: 10.23" x 7.09" x 2.09"
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Accepts 4 AWG power and ground wire
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Differential-balanced inputs reject noise
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Remote turn-on capable for seamless system integration
No matter your ride, it installs cleanly and works reliably.
🔄 Built for System Expansion
The JD400/4 works great alone or as part of a full system. Pair it with the JD250/1 or JD1000/1 for complete sound coverage.
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Run front and rear speakers
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Bridge channels to power subwoofers
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Add additional amps as your system grows
It’s a powerful core that leaves room for upgrades.
✅ Key Features Overview
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4-channel Class D car amplifier
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100W RMS x 4 @ 2 ohms
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Variable high/low-pass filters
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LED clipping indicators
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Compact chassis with smart mounting options
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Accepts speaker- and RCA-level inputs
🎯 Looking to upgrade more components? Browse our full selection of car amplifiers collection and find the perfect fit for your system.
🚘 Want a stealthy look to match your sound? Explore car window tinting services to enhance your vehicle’s style and comfort.
👋 Connect with the Audio Experts at Audio Jam
Need help choosing the right amplifier or building your dream audio system? The professionals at Audio Jam are here to help. From design to install, we’ve got your back.
📍 Audio Jam
227 Governors Place, Bear, DE 19701
📞 (302) 832-2868
Stop in today or call for expert advice and installation services. Bring your system to life the right way!
❓ Frequently Asked Questions
Q1: Can I use the JD400/4 for a subwoofer?
Yes. You can bridge the rear channels to power a sub up to 200 watts RMS.
Q2: Does this amp work with factory head units?
Yes. It accepts speaker-level inputs and includes signal-sensing turn-on for easy factory integration.
Q3: What fuse size should I use?
JL Audio recommends a 40A fuse for safe and reliable power protection.
