Kicker

KICKER 51KSS6904 KS Series 6x9" Component Speakers – 150W RMS

✓ Garage Audio Approved ✓ Australian Warranty ✓ Expert Support
$499.00

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Take your vehicle's audio system to the next level with the KICKER 51KSS6904 KS Series 6x9-Inch Component Speakers. Designed for enthusiasts who demand powerful output, exceptional detail, and installation flexibility, the KS Series delivers premium sound quality with concert-level performance.

The 6x9-inch woofers feature internally dampened polypropylene cones and durable rubber surrounds to produce accurate midbass and midrange response with excellent control. Paired with premium 25mm silk dome tweeters, the system delivers smooth, natural highs and impressive detail across the entire frequency range.

One of the standout features of the KSS6904 is its versatile installation design. The removable phase plug allows the tweeters to be mounted directly into the woofer using the included articulating adapter, creating a premium coaxial-style setup with adjustable tweeter positioning. Alternatively, the tweeters can be installed separately for a traditional component speaker configuration and superior sound staging.

With high power handling, compact crossover networks, and multiple mounting options, the KSS6904 is an ideal upgrade for both factory and aftermarket audio systems.

Key Features

  • Premium 2-way component speaker system
  • 6x9-inch (160mm x 230mm) woofers
  • 25mm silk dome tweeters for smooth, natural highs
  • Up to 150 Watts RMS power handling
  • Convertible component or coaxial-style installation
  • Articulating tweeter pod for improved off-axis performance
  • Polypropylene woofer cones for accurate sound reproduction
  • Durable rubber surrounds for long-lasting reliability
  • Compact crossover networks for easier installation
  • Multiple tweeter mounting options included
  • High sensitivity for impressive output
  • Protective grilles included

Specifications

Specification Details
Speaker Type 2-Way Component System
Woofer Size 6x9" (160 x 230mm)
Tweeter Size 1" (25mm)
Tweeter Dome Material Silk
Rated Impedance 4 Ohms
Recommended Amplifier Power 15-150 Watts RMS
Sensitivity 92 dB (1W/1m)
Frequency Response 35Hz – 21kHz
Woofer Mounting Hole Diameter 143 x 215mm
Woofer Mounting Depth 75mm
Flush Mount Tweeter Hole Diameter 45mm
Flush Mount Tweeter Depth 17mm
High Pass Crossover 12dB @ 4,000Hz
Low Pass Crossover None
Tweeter Level Adjustment 0dB, -4.5dB, -9dB
Grilles Included Yes
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Specifications

6x9" Component Speakers • Separate tweeters • Component crossover system • Premium sound upgrade

Garage Audio Product Guide

Everything You Need to Know

Our Expert Opinion

Garage Audio Review

A high-performance component speaker set with strong detail and imaging. A great upgrade for customers wanting better sound quality from their vehicle.

Performance Ratings

How We Rate It

Garage Audio Overall Rating
★★★★★ 8.9/10
Premium component speakers offering improved detail, staging and sound quality.
Build Quality 9/10
Value 8/10
Clarity 9/10
Treble 9/10
Midrange 9/10
Bass 8/10

Buying Advice

Is This Product Right for You?

Key Benefits

  • Premium component design • Improved sound staging • Detailed high-frequency response

Best For

Premium vehicle audio upgrades requiring strong imaging and detail

Things to Consider

  • Requires correct mounting depth and vehicle speaker fitment confirmation.
Upgrade Level
Premium Speaker Upgrade

Product Information

Audio Specifications

Power Rating
150W RMS
RMS Power
150 W
Peak Power
450 W
Recommended Amplifier
50-150W RMS Per Channel
Speaker Size
6x9 Inch
Impedance
4 Ohm
Audio Type
Speaker
Product Role
Component Speaker
Brand
Kicker

Professional Installation Available

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