🔊 JL Audio C1-400x Car Speaker – High-Fidelity 4-Inch Sound Upgrade
The JL Audio C1-400x is a compact 4-inch coaxial car speaker designed to transform your factory system. It delivers crystal-clear sound, tight midrange tones, and subtle bass—perfect for drivers who want premium audio in a small package.
Whether you’re upgrading old speakers or building a custom system, the C1-400x ensures rich audio clarity without taking up too much space.
🎶 Balanced Sound That’s Surprisingly Powerful
Don’t let the 4-inch size fool you. The JL Audio C1-400x packs a punch with its injection-molded, mineral-filled polypropylene woofer. It provides tight midrange response and surprising bass depth.
Paired with a 0.75-inch aluminum edge-dome tweeter, this car speaker offers smooth, detailed highs. The integrated tweeter delivers clarity without being harsh—so vocals and instruments stay crisp even at high volumes.
The speaker's stamped steel frame offers rigidity and helps reduce distortion at louder levels. It’s ideal for front-stage use or as part of a multi-speaker setup.
🔍 Key Features of the C1-400x
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4-inch 2-way coaxial car speaker
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Mineral-filled polypropylene woofer cone
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0.75-inch edge-dome aluminum tweeter
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Frequency response: 66 Hz – 24,000 Hz
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Peak power: 100 watts / RMS: 35 watts
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Sensitivity: 85.5 dB @ 1W/1m
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Impedance: 4 ohms
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Integrated tweeter crossover network
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Shallow mounting depth: only 1.73 inches
The JL Audio C1-400x is built to exceed OEM quality and provide a more engaging listening experience.
🧰 Easy Installation in Tight Spaces
The shallow mounting depth of the JL Audio C1-400x allows it to fit in tight door panels and dashboards. It’s a direct-fit replacement in many vehicles, requiring minimal modification.
You get durable, secure installation thanks to the speaker’s multi-hole mounting pattern. JL Audio includes grilles and hardware for a professional, clean look.
Looking to build a complete system? Pair this with any of our car speakers collection for a full-range sound upgrade.
💡 Perfect Match for System Expansion
Pair the C1-400x with larger car speakers or a compact car subwoofer for full-range sound. Add a small amplifier and you’ll unlock this speaker’s full potential.
Even without an amp, this JL Audio speaker works great with factory and aftermarket head units. The built-in crossover ensures each driver gets only the frequencies it’s designed to handle.
This makes your music more dynamic, less muddy, and full of detail.
🌞 Add Window Tint for Acoustic Comfort
Long drives can expose your interior to harsh sunlight. This not only degrades your upholstery but also affects your sound system.
Reduce heat, glare, and UV damage with Delaware window tinting. Tint keeps cabin temperatures cooler, protecting your JL Audio equipment and enhancing your ride's comfort and acoustics.
At Audio Jam, we recommend window tint as part of a complete in-car audio upgrade.
🛠️ Installed by Car Audio Specialists at Audio Jam
Don’t let factory wiring or trim challenges stop you. Our expert installers at Audio Jam make sure your JL Audio C1-400x speakers are installed cleanly and securely.
We’ll ensure proper alignment, optimal placement, and clean wiring for maximum sound quality and long-lasting performance. From a simple pair of speakers to a full audio build, we handle every detail.
📍 Visit Audio Jam in Bear, Delaware
Audio Jam
227 Governor Place
Bear, DE 19701
📞 (302) 832-2868
🕒 Monday – Saturday, 10 AM – 6 PM
Stop by today for professional car speaker installation, custom audio systems, or upgrade advice.
❓ Frequently Asked Questions (FAQ)
Q1: Can the C1-400x replace factory 4-inch speakers?
Yes. It’s designed to fit many 4-inch factory speaker openings with minimal modification.
Q2: Does the C1-400x require an amplifier?
No. It works well with factory head units but benefits from external amplification.
Q3: Are grilles included?
Yes. JL Audio provides protective grilles and mounting hardware with the speakers.
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