What sets C1 apart?
JL Audio designed the C1 Series C1-400x 4" speakers to be the very best they could be for the price. You'll find solid construction and finish, along with some eye-popping flair in its striking yellow mineral-filled polypropylene woofer. That woofer delivers impactful lows and is specially designed for a natural roll-off transition to the highs handled by the tweeter. And it's the aluminum edge-driven tweeter that gives the C1 Series its distinctive sound, setting it apart from other speakers at this price. You'll hear crisp detail in the high frequencies, incredible imaging, and minimal distortion no matter how you power them.
Why no grilles?
Most folks have no use for aftermarket grilles, opting to use their factory grilles for a streamlined look. With that in mind, JL Audio doesn't include grilles with the C1 Series, opting instead to incorporate those savings into building an all-round better speaker.
Features and Specs
| General | ||
|---|---|---|
| Speaker Size | 6 1/2 | |
| Design | 2-way | |
| Tweeter Design | 3/4" Edge-Driven Dome | |
| Impedance (Ohms) | 4 | |
| Tweeter Composition | Aluminum | |
| Woofer Composition | Mineral-Filled injection-Molde | |
| Woofer Surround | Rubber | |
| Parts Warranty | 1 Year | |
| Labor Warranty | 1 Year | |
| Specifications | ||
| Sensitivity (1W at 1 meter) | 90.5 | |
| Sensitivity at 2.83 volts | 93 | |
| Frequency Response | 48 - 24k Hz | |
| Minimum RMS Wattage | 10 | |
| Maximum RMS Wattage | 75 | |
| Peak Power Handling (Watts) | 225 | |
| Top-mount Depth (Inches) | 2 1/16 | |
| Bottom-mount Depth (Inches) | N/A | |
| Cutout Diameter or Length (inches) | 5 | |
Features
Woofers: Each JL Audio C1 woofer features a mineral-filled, injection-molded polypropylene cone with a rubber surround.
Size Classification Note: These speakers are marketed as 6-1/2"; the woofers will fit in standard 6-1/2" speaker openings, but do not use the standard 6-1/2" speaker bolt pattern. In order to install them in standard 6-1/2" speaker openings you must drill new screw holes. If new holes are drilled in the mounting surface of the car, no bracket is needed. If drilling in the car is not an option, the included brackets can be used, which have standard 6-1/2" mounting holes, the Ford non-symmetric four hole pattern, and non-standard 6-3/4" three and four hole patterns. Please enter your vehicle information to confirm fit.
Tweeters: The 3/4" edge-driven, aluminum dome tweeters are damped by a silk surround suspension. Flush and surface tweeter mounting brackets are included.
Tweeter Dimensions:
| Frame Diameter | Cutout Diameter | Mounting Height | Mounting Depth | |
| Flush Mount | 1.675" | 1.448" | 0.248" | 0.863" |
| Surface Mount | 1.712" | Screw Holes Only | 0.748" | 0.508" (Screw Depth) |
Tweeter Crossovers: The in-line tweeter crossovers are 2nd order (12 dB/octave slope) and the 31" input and 14" output wires are attached. The input wires are terminated with female quick slides that plug into terminals on the woofers and the output wires are terminated with male quick slides that plug into the terminals on the wires attached to the tweeters. The woofer is unfiltered, using its engineered roll-off characteristics to blend with the tweeter. The electronic tweeter protection circuit is designed to minimize the possibility of tweeter failure. It monitors current going to the tweeter and will disconnect the tweeter from the signal when it senses overload. Once the volume has been reduced, the protection circuit will reset itself automatically.
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