Kicker 51KSC404 4inch KS Coaxial Speakers

Potent Performance

KICKER KS-Series Speakers let you play at concert-like volume, yet maintain the smoothness and subtlety to please even the most selective ear. Internally dampened polypropylene cones and durable rubber surrounds assist the woofers in creating precise midrange and midbass, while high-quality silk-dome tweeters deliver natural, detailed highs.

With less than a 2-inch mounting depth and zero tweeter protrusion, the KSC40 is a perfect fit in almost every vehicle on the road today. They work best with 15 to 75 watts of recommended power. See below for more details.

High power handling
Silk-dome tweeters for a smooth sound
Polypropylene woofer and tough rubber surrounds
Thin-mount design easily fits behind factory grilles

Speaker Design
2-Way
Woofer [in, mm]
4, 100
Tweeter [in, mm]
½, 13
Rated Impedance [Ω]
4
Recommended Amplifier Power [Watts RMS]
15-75
Sensitivity [1W, 1m]
88
Frequency Response [Hz]
60-20k
Mounting Hole Diameter [in, mm]
3-11⁄16, 94
Top Mount Depth [in, mm]
1-13⁄16, 46
Bottom Mount Depth [in,mm]
2-1⁄16, 51
Tweeter Protrusion [in,mm]
0, 1
Grilles
No
Tweeter Magnet Material
Neodymium
Tweeter Dome Material
Silk
Woofer Cone Material
Polypropylene
Woofer Surround Material
Rubber