KICKER KM604W 150W Marine Speakers 4-Pack Bundle - Fade-Proof White

Our review of the KICKER KM604W 4-pack finds these speakers ideal for boat owners and powersports riders who want durable, full-range sound without constant maintenance. The bottom line is simple: if you need marinized coaxials that resist UV, salt spray and the typical wear of a watersports environment, this kit delivers consistent performance and a clean white finish that holds up. The included Car Toys keychain is a small bonus, while the core appeal is the speakers themselves, built and tested to meet strict marine exposure standards.

Key Features

• Marine-grade construction: ASTM-tested for UV and salt/fog exposure so the speakers can survive prolonged coastal conditions.
• Water resistance: Splash-and-spray-resisting sealed motors, cones and locking terminal covers help prevent corrosion in wet environments.
• UV-resistant finish: Injection-molded cones, Santoprene surrounds and grilles are treated to resist fading and degradation from sun exposure.
• Balanced power handling: 150 Watt peak with 50 Watt RMS provides reliable output for typical boat audio systems without overtaxing a 12 Volt power source.
• Coaxial full-range sound: Two-way 6 in design delivers clear midrange and adequate highs from a compact speaker size.
• Complete 4-pack: Kit includes four speakers with white grilles for a uniform look across a vessel or powersports rig.

Who It's For

The KM604W set is aimed at boat owners, personal watercraft users and powersports enthusiasts who need speakers that were designed specifically for marine use and who value long-term resistance to UV and salt exposure. Installers who prefer a coaxial 6 in speaker that balances ease of fitment with dependable weatherproofing will find this bundle convenient and practical.

Those seeking ultra-high output competition speakers, custom component systems or detailed audiophile fidelity beyond a coaxial design may want to look elsewhere. Likewise, if a color other than white is required for a custom interior, this fade-proof white finish may not match.

Pros & Cons

Pros

• Durable marine-ready construction that meets ASTM standards for UV and salt/fog exposure.
• Sealed motors, cones and locking terminals reduce the chance of water damage over time.
• UV-treated materials and Santoprene surrounds help maintain appearance and performance.
• Includes four matched speakers for a consistent install and a small branded keychain.

Cons

• As a coaxial 6 in speaker, it delivers solid full-range sound but will not match separate component systems for extreme clarity or staging.

Specifications

Model	KICKER KM604W (KM Series)
Configuration	2-way coaxial, 6 in
Power	150 Watt peak / 50 Watt RMS
Power source	12 Volt
Water resistance	Water resistant with sealed motors and terminals
Finish	Fade-proof white grilles, UV resistant

Our Verdict

The KM604W 4-pack is a practical, value-minded choice for most recreational boat owners and powersports users who want reliable, weatherproof sound with low upkeep. Its ASTM-tested marine treatments and sealed components make it a smart upgrade over non-marine speakers, and the included four-speaker kit simplifies a full-boat refresh while keeping installation straightforward.

Frequently Asked Questions

Are these speakers fully waterproof?
They are water resistant with sealed motors, cones and locking terminal covers to resist splash and spray, but they are not intended for full submersion.

Will these run on a standard boat electrical system?
Yes, the speakers are designed for a 12 Volt power source and 50 Watt RMS handling per speaker, compatible with typical marine audio setups.

Do the grilles resist fading?
Yes, the injection-molded cones, Santoprene surrounds and grilles are UV-treated to resist fading and environmental degradation.