Kicker KS Series 6×9-Inch Component Speaker System (51KSS6904 / KSS690)

Deliver substantial acoustic output, broad dynamic range, and articulate sound staging with the Kicker KS Series 6×9-Inch Component Speaker System (51KSS6904 / KSS690 / KSS6904). As the premium tier in Kicker's drop-in replacement lineup, the KS Series is engineered to handle substantial external amplifier power while maintaining high sensitivity, low mechanical distortion, and smooth, linear frequency response across the audible spectrum.

Featuring an adaptable 2-way architecture, the KSS690 can be installed either as a traditional split component system (with separate door woofers and pillar/dash-mounted tweeters) or converted into a high-output point-source coaxial setup using Kicker's included center-post conversion system. Pairing internally damped polypropylene cones and tough Santoprene® surrounds with 1-inch silk-dome tweeters, this system delivers rich low-end punch, natural midrange body, and fatigue-free highs.

Key Features & Benefits:

• Convertible Component-to-Coaxial Flexibility: Includes center-mounting post adapters that allow the tweeters to mount directly onto the center of the 6×9 woofer cones if your vehicle lacks dedicated factory A-pillar or sail-panel tweeter pods.
• 1-Inch (25mm) Pure Silk-Dome Tweeters: Smooth, natural high-frequency extension up to 21,000 Hz with zero harshness, metallic ringing, or ear fatigue during extended listening sessions.
• Tough Polypropylene Cones & Santoprene® Surrounds: Polypropylene woofer cones backed by durable Santoprene rubber surrounds resist cabin humidity, UV degradation, and temperature swings while providing linear cone excursion under heavy bass loads.
• Substantial 150W True RMS Power Handling: Built to handle sustained clean power from aftermarket 2-channel or 4-channel amplifiers (up to 300W Peak / 150W RMS per pair), delivering high output and headroom without thermal compression.
• Compact In-Line 12dB/Octave Passive Crossovers: External crossover networks feature selectable tweeter attenuation levels (0dB / -4.5dB / -9dB) to match cabin acoustics and tweeter placement height, packaged in slim inline housings for clean in-door wiring.
• Extended Voice Coil (EVC™) Technology: Heavy-gauge copper voice coils on Kapton formers ensure high motor linearity, cooler operating temperatures, and tight, controlled mid-bass response.
• High-Efficiency 91 dB Sensitivity: Efficient motor design ensures high dynamic range and vocal punch whether powered by high-output head units or high-power external amplifiers.

Ideal Applications:

• Front Door Upgrades in Modern Bakkies, Trucks & SUVs: Direct fit for vehicles with factory 6×9 door cutouts (e.g., Toyota Hilux/Fortuner, Ram, Ford, GM) seeking audiophile-grade vocal clarity and mid-bass impact.
• High-Power Amplified Systems: The ideal acoustic match for external Class-D or Class-A/B amplifiers delivering 75W to 100W RMS per channel.
• Custom Convertible Cabin Installs: Ideal when separate tweeter locations are preferred for soundstage elevation, with the flexibility to convert to a coaxial driver when door/pillar depth is constrained.

Product Specifications: