Kicker 51KSC6704 is a KS Series 6.75-inch 2-way coaxial speaker pair built for full-range factory speaker replacement and amplified vehicle audio upgrades.
Key Performance Features
6.75-inch 2-way coaxial speaker pair
15–100 W RMS recommended amplifier power
Polypropylene woofer with rubber surround
0.75-inch silk-dome tweeter
Thin-mount design with included grilles
System Architecture
Type: 2-way coaxial speaker pair
Application: Full-range vehicle speaker upgrade
Nominal Impedance: 4 Ω
Recommended Amplifier Power: 15–100 W RMS
Power Handling / Output
Recommended Power: 15–100 W RMS
Driver / Construction
Polypropylene woofer cone
Rubber woofer surround
0.75-inch silk-dome tweeter
Neodymium tweeter magnet
Grilles included
Installation Use Cases
Factory 6.75-inch speaker replacement
Amplified front or rear speaker upgrades
Daily-driver sound quality systems needing broad frequency response
Technical Specifications
Brand: Kicker
Series: KS Series
Model: 51KSC6704
Speaker Design: 2-way coaxial
Woofer Size: 6.75 in. (165 mm)
Tweeter Size: 0.75 in. (20 mm)
Impedance: 4 Ω
Sensitivity: 90 dB
Frequency Response: 40 Hz – 21 kHz
Top Mount Depth: 1-13/16 in. (46 mm)
Identifiers & Packaging
MPN: 51KSC6704
UPC: 713034058427
Sold As: Pair (2 speakers)
Included Components: Two coaxial speakers, grilles, mounting hardware, documentation
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
