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Kicker KSC4 (51KSC404) (Open Box, Good)

300W Peak (150W RMS) 4" KS Series 2 Way Coaxial 4-ohm Speakers

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• 150 watts Peak Each, 75 watts RMS Each
• 1/2" Silk Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

Learn more about the ls-51ksc404-u7
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List price $119.99
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-50%

$59.99

/pair  with warranty
Starting at $11/mo or 4 payments of $15 Buy now, pay later and installment payment plans are offered by Afterpay and Affirm. Learn more

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In Stock. Only 1 Left!
Open Box, Good

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Description


Kicker brand icon

Authorized dealer

Item Condition - Open Box, Good:

This product is used, but it will work like new and is in overall good condition. It will show signs of wear that can include scuffing, scratches, fingerprints, dents, and worn corners or installation marks. May be missing non-essential parts, accessories or original packaging.

Kicker 51KSC404

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.

Product Details:

  • 4" KS Series 2-way Coaxial Car Speakers
  • Power Handling:
    • Peak: 300 watts per pair / 150 watts each
    • RMS: 150 watts per pair / 75 watts each
  • Polypropylene cone material
  • Rubber speaker surround
  • 1/2" Silk Balanced Dome tweeters
  • Neodymium magnet motor structure
  • Thin-mount design easily fits behind factory grilles
  • Top-mount Depth: 1-13/16"
  • Cutout Dimensions: 3-11/16"
  • Impedance: 4 ohm
  • Frequency Response: 60 - 20000 Hz
  • Sensitivity: 88 dB
  • Authorized Internet Dealer
  • MFR #: 51KSC404
  • 2 Year Manufacturer's Warranty

  • Priced Per Pair

Product history:

Kicker 51KSC404 thumbnail
(newest, current model)
Kicker KSC40 thumbnail
(previous model, replaced by Kicker KSC4 (51KSC404) (Open Box, Good))

Specifications & Details


Speaker Specifications
Series
KS Series
Priced Per
Pair
Number of Speakers
2
Speaker Size
4"
Design
2-way Coaxial
Tweeter Design
Balanced Dome
Tweeter Size
1/2"
Tweeter Composition
Silk
Woofer Composition
Polypropylene
Woofer Surround
Rubber
Peak Power Handling
150 watts
RMS Power Handling
75 watts
Total PEAK Per Pair/Set
300 watts
Total RMS Per Pair/Set
150 watts
Sensitivity
88 dB
Frequency Response
60 - 20000 Hz
Impedance (Per Voice Coil)
4 ohm
Shallow Mount Installation
No
Magnet Type
Neodymium
Top-Mount Depth (Mounting Depth)
1-13/16"
Bottom-Mount Depth
2-1/16"
Cutout Dimensions
3-11/16"
CTA-2031 Compliant
No
General specifications
Marine Certified
No
Hi-Res Certified
No
Color
Black
Illumination
None
Speaker Grilles
No
Includes Damping Kit
without Damping Kit
Compatible vehicle types
Car/Truck/SUV/Van
What is in the box?
Paperwork
Warranty/Registration card
Quick start guide
WITB: Speakers
Speakers (2)
Speaker mounting brackets (2)
Mounting screws (8)
Speaker connection cables (2)
Warranty and Return Policy
Parts Warranty Duration
2 years
Labor Warranty Duration
2 years
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

51KSC404

Weight:

2.60lbs

Internal SKU:

ls-51ksc404-u7

Internal Product ID:

231790

Customer Ratings & Reviews


Kicker KSC4 (51KSC404) (Open Box, Good) thumbnail image

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Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.