Kicker KS Series 51KSC6504 6.5" Coaxial Speakers, 100W RMS, 4Ω, Pair

Kicker 51KSC6504 is a 6.5" 2-way coaxial speakers designed for car audio speaker upgrades where clean output, factory-location fitment, and reliable daily-driver performance are required.

Key Performance Features

• 15–100 W RMS power handling for upgraded speaker output
• Not provided peak power handling when properly powered
• 4 Ω nominal impedance for standard aftermarket system integration
• Designed for replacement or upgrade use in compatible factory speaker locations

System Architecture

• Type: 2-Way Coaxial Speakers
• Application: Higher-performance OEM speaker replacement and amplified full-range speaker upgrades
• Nominal Impedance: 4 Ω
• System Role: Full-range speaker upgrade

Power Handling / Output

• Continuous Power Handling (RMS): 15–100 W
• Peak Power Handling: Not provided

Driver / Construction

• Polypropylene woofer cone
• Rubber woofer surround
• 3/4" silk-dome tweeter
• Neodymium tweeter magnet
• Grilles included

Installation Use Cases

• Factory speaker replacement in compatible vehicle locations
• Daily-driver car audio upgrades using a factory or aftermarket radio
• Amplified speaker systems when matched to the speaker's RMS rating

Technical Specifications

• Brand: Kicker
• Series: KS Series
• Model: 51KSC6504
• Product Type: 2-Way Coaxial Speakers
• Size: 6.5"
• Impedance: 4 Ω
• Power Handling (RMS): 15–100 W
• Power Handling (Peak): Not provided
• Frequency Response: 43 Hz – 21 kHz
• Sensitivity: 90 dB @ 1 W / 1 m
• Mounting Depth: 1-13/16" top mount; 2-3/16" bottom mount
• Mounting Hole Diameter: 4-13/16"

Identifiers & Packaging

• MPN: 51KSC6504
• UPC: 713034058410
• Sold As: Pair (2 speakers)
• Included Components: Pair of speakers, grilles

Why Buy From MCOR Automotive

• Authorized retailer for the brands we sell
• Specialists in car audio, marine audio, and vehicle-specific integration
• Expert support for product selection, amplifier matching, and clean system setup