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Free Worldwide Shipping & Duties Covered
We are pleased to offer Free Worldwide Shipping on all orders, delivering to all countries and regions supported by our logistics network. There are no restrictions on order quantity, parcel size, or shipment weight — every order ships at no cost to you. In addition, all customs duties, import taxes, and government-imposed fees associated with your shipment will be fully covered by us, ensuring you will not incur any extra charges upon delivery.
Please note that delivery times may vary due to local customs procedures and carrier conditions, but your shipping and customs costs will remain completely free under this policy.
We provide a secure and reliable Free Returns service for all customers. Items that remain unused and unopened may be returned within 60 days for a full refund.
All return shipping expenses, including customs-related fees, are fully covered by us.
Refund processing will be completed within 4 weeks from the date the return shipment is sent, regardless of whether the package has arrived at our facility. In general, refunds are finalized significantly earlier, ensuring a smooth and dependable experience.
KICKER’s elite KS-Series Coaxial Speakers upgrade your audio to new levels of accuracy with extended frequency response and the smoothest highs.
Model: 51KSC41004
| Speaker Design |
| 2-Way |
| Woofer [in, mm] |
| 4x10, 100x250 |
| Tweeter [in, mm] |
| ½, 13 |
| Rated Impedance [Ω] |
| 4 |
| Recommended Amplifier Power [Watts RMS] |
| 15-75 |
| Sensitivity [1W, 1m] |
| 88 |
| Frequency Response [Hz] |
| 45-20k |
| Mounting Hole Diameter [in, mm] |
| 3-7/8 x 9-3/8, 99 x 238 |
| Top Mount Depth [in, mm] |
| 2-3/8, 61 |
| Bottom Mount Depth [in,mm] |
| 2-13/16, 71 |
| Tweeter Protrusion [in,mm] |
| 0, 1 |
| Grilles |
| No |
| Tweeter Magnet Material |
| Neodymium |
| Tweeter Dome Material |
| Silk |
| Woofer Cone Material |
| Polypropylene |
| Woofer Surround Material |
| Rubber |
| Warranty |
| When purchased from an Authorized KICKER Dealer or kicker.com, KICKER warrants this product to be free from defects in material and workmanship under normal use for a period of TWO (2) YEARS from date of original purchase. - Complete warranty information here. |
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 2.5-inch mounting depth and zero tweeter protrusion, the KSC4100 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.
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