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
