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Kicker KSC40 KS Series 4" 2-way car speakers

Item # 20651KSC40

Hearing the Kicker KS-series speakers will make you wonder why you waited to replace your factory speakers.

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Hearing the Kicker KS-series speakers will make you wonder why you waited to replace your factory speakers.

Item # 20651KSC40

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About the Kicker KSC40

Dave Delamere

Smooth detail

Kicker designed their KS Series to be a substantial step up from run-of-the-mill factory speakers. The KSC40 4" speakers feature a polypropylene woofer that provides a satisfying, natural sound, paired with a 1/2" silk dome tweeter that prioritizes smoothness in your music's vocal and instrumental details. Install a pair and rediscover how your favorite songs were meant to be heard.

Smooth detail

Kicker designed their KS Series to be a substantial step up from run-of-the-mill factory speakers. The KSC40 4" speakers feature a polypropylene woofer that provides a satisfying, natural sound, paired with a 1/2" silk dome tweeter that prioritizes smoothness in your music's vocal and instrumental details. Install a pair and rediscover how your favorite songs were meant to be heard.

Kicker 51KSC404 4" 2-way speakers

The Kicker's silk dome tweeters offer smooth highs for any type of music.

Use factory or aftermarket power

Not planning on swapping out your factory radio or adding an amp? No problem. With the KS Series, Kicker created a highly sensitive design that conjures hefty volume even from low-powered factory radios.

Kicker prioritizes fit

These low-profile speakers feature a reduced mounting depth and minimal tweeter protrusion, making them a match for almost any car. They also include 3-hole mounting brackets for some mounting versatility depending on your application.

Note: These speakers do not include grilles and are designed to fit behind factory grilles or panels.

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Product highlights:

  • 2-way car speakers (pair)
  • 4" polypropylene woofer cone with rubber surround
  • 1/2" silk dome tweeter
  • handles up to 75 watts RMS (150 watts peak power)
  • frequency range: 60-20,000 Hz
  • sensitivity: 88 dB
  • top-mount depth: 1.811"
  • impedance: 4 ohms
  • includes 3-hole mounting brackets for mounting versatility
  • grilles not included
  • warranty: 2 years
  • MFR # 51KSC404

What's in the box:

  • Two 2-way speakers
  • 2 Adapter brackets
  • Two 11" Lengths of speaker wire (tinned wire on one end and female quick slides on the other)
  • 4 Red plastic wire caps
  • Eight 1-1/8" Screws
  • Quick-Start guide (English/ Spanish/ German/ French)

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More details on the Kicker KSC40

Pat M.

Features & specs

General
Speaker Size 4
Design 2-way
Tweeter Design 1/2" Balanced Dome
Impedance (Ohms) 4
Tweeter Composition Silk
Woofer Composition Polypropylene
Woofer Surround Rubber
Parts Warranty 2 Years
Labor Warranty 2 Years
Specifications
Sensitivity (1W at 1 meter) 88
Sensitivity at 2.83 volts N/A
Frequency Response 60 - 20k Hz
Minimum RMS Wattage 15
Maximum RMS Wattage 75
Peak Power Handling (Watts) 150
Top-mount Depth (Inches) 1 13/16
Bottom-mount Depth (Inches) 2 1/16
Cutout Diameter or Length (inches) 3 3/4
Mounting Height (Inches) 0.225
Frame Width 4.028
Frame Length 4.028
The Kicker KSC40 replaces these items:

Product Research

Features

4/2 Hole Compatibility: Most 4" factory speakers use four mounting screws, however, in some vehicles only two are used. The KSC40's mounting tabs can be removed, allowing installation in 4-hole or 2-hole applications. Care should be taken handling the speaker after any tabs are removed because the broken edges may be sharp. Please enter your vehicle information to confirm fit.

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