C1 speakers deliver real substance and great audio performance in a format designed for easy fit behind factory grilles.
To facilitate fit, multi-application adaptor rings are included for the C1-650 woofers, allowing easy, drop-in installation in vehicles equipped with oversized 6.5-inch and 6.75-inch speaker openings. Without the ring, the woofers will also fit into many "6-inch" speaker locations as well. Surface and flush mounts are included with C1 tweeters for maximum installation versatility.
C1 woofer drivers benefit from proprietary FEA modeling and JL Audio's expertise in low-frequency driver design. This knowledge is used to create speakers that can play loudly, while maintaining a smooth, dynamic, low distortion sound. At the core of the C1-650 is a proprietary, stamped, steel 6.50-inch (165 mm) frame and a DMA-optimized motor system. A mineral-filled, injection-molded polypropylene cone is suspended with a rubber surround on the front, and a carefully engineered flat Conex® spider at the top of the voice coil, to precisely control the voice coil's motion. Tinsel leads are carefully routed and attached to the spiders to prevent fatigue and buzzing. These are the same kinds of features and materials normally found on much more expensive loudspeakers.
Equipped with a true, edge-driven, aluminum dome tweeter, C1 speakers stand further apart from others in its category with superior high-frequency clarity and definition. The tweeter’s design has inherently excellent off-axis response and high-frequency extension. It also benefits from the damping of a silk surround suspension and Ferrofluid in the voice coil gap, along with the superior strength of a neodymium magnet circuit. An in-line, outboard 2nd order high-pass filter, with Advanced Tweeter Protection Circuitry, is included to further enhance smoothness and improve power handling.
When it comes to value, C1 is the real deal!
Sold as a pair. Grilles not included.
Continuous Power Handling (RMS)
Peak Music Power
Recommended Amplifier Power (RMS)
10 - 75 W / Ch.
91.0 dB @ 1 W / 1 m
System Nominal Impedance
System Frequency Response
59 Hz - 22 KHz ± 3 dB
Woofer Physical Specifications
Frame Outer Diameter* (A)
6.5 in / 165 mm
Grille Tray Outer Diameter (B)
6.84 in / 174 mm
Motor Outer Diameter (C)
3.15 in / 80 mm
Frontal Coaxial Tweeter Protrusion (D)
Frontal Grille Protrusion** (E)
0.85 in / 22 mm
Mounting Hole Diameter (F)
5.56 in / 141 mm
Mounting Depth (G)
2.44 in / 62 mm
*Does not take into account mounting tabs **Frontal grille protrusion measured from mounting surface