The Kicker KM604WL is a 6.5" marine coaxial speaker built to survive the ocean and sound good doing it. RGB LED lighting, a UV-resistant polypropylene cone, and a sealed motor assembly make this the go-to upgrade for boaters who want reliable performance without spending $400 a speaker.
Authorized Kicker dealer. In stock and ships fast from Fort Lauderdale.Order the KM604WL — $119.99/ea →
Who Should Buy the Kicker KM604WL?
The KM604WL is built for the boater who wants a real upgrade over factory speakers without going full custom-install. Specifically, it's the right call if you're:
- Running a pontoon or deck boat in the 16–22 ft range where 6.5" coaxials are the standard fit
- Replacing corroded or blown factory speakers for the first time
- On a budget of $100–$150 per speaker and want a legitimate Kicker product, not a knockoff
- Doing a DIY install in a relatively protected gunwale or transom location
- Adding speakers to a center console or bay boat where ambient noise isn't extreme
If you're on a larger wake boat running wide open throttle with wind and engine roar competing with your audio, you may want to step up to the KM654L for more power headroom. But for a lot of boaters on Florida's Intracoastal, the KM604WL is exactly what they need.
Kicker KM604WL Specifications
| Spec | Value | |------|-------| | Speaker Size | 6.5" (165mm) | | Configuration | 2-way coaxial | | Peak Power | 150W | | RMS Power | 50W | | Impedance | 4-ohm | | Frequency Response | 65Hz – 20kHz | | Sensitivity | 89 dB | | Tweeter | 0.5" aluminum dome | | Cone Material | UV-resistant polypropylene | | Surround | Santoprene rubber | | LED Lighting | RGB (multi-color) | | IP Rating | IP65 (dust-tight, water jet resistant) | | Grille | Included (stainless steel) | | Color | White | | Sold As | Single (order 2 for a pair) |
Why Kicker Builds Marine Speakers Differently
Regular car speakers will fail within a season on a saltwater boat. It's not a question of if — it's when. The KM604WL is engineered from the ground up for the marine environment, not adapted from a car speaker with a coat of marine paint.
Sealed motor assembly: The magnet and voice coil are sealed against moisture intrusion. Water getting into the motor assembly is the most common cause of speaker failure on boats. Kicker blocks that path entirely. UV-resistant polypropylene cone: Florida sun is brutal. Most speaker cones degrade and crack when exposed to UV over a season or two. Kicker's cone material is formulated to resist UV degradation, so you're not looking at warped or brittle cones after a year on the water. Santoprene rubber surround: Santoprene holds up to ozone, heat, and salt air. Foam surrounds — common in cheaper marine speakers — break down fast in saltwater environments. IP65 rated: Dust-tight and protected against water jets from any direction. Your speakers can get soaked from rain, spray, or a direct rinse and keep working. Stainless steel grilles: The grilles that come with the KM604WL are stainless, not chrome-plated plastic. They won't rust or pit.The RGB LEDs: More Useful Than You'd Think
At first glance, RGB LEDs on speakers seem like a gimmick. Out on the water at night, they're genuinely functional. They illuminate the deck, they sync well with other Kicker LED accessories, and they give the boat a finished look that straight black or white speakers don't.
The KM604WL supports Kicker's KMLC LED controller (sold separately), which lets you set static colors, strobes, and sync effects across multiple speakers. You can run them white for a clean look or program them to whatever color scheme matches your boat's lighting.
If LEDs don't matter to you, these are still excellent speakers without the controller — they default to white LED on power.
KM604WL vs. KM654L: Which One Do You Need?
| | KM604WL | KM654L | |--|---------|---------| | Size | 6.5" | 6.5" | | Peak Power | 150W | 195W | | RMS Power | 50W | 65W | | Impedance | 4-ohm | 4-ohm | | Price | $119.99/ea | $229.99/ea | | Best For | Boats 16–22 ft, protected locations | Boats 20–28 ft, open locations |
The KM654L has a higher-displacement cone and more robust motor that handles more amplifier power cleanly. If you're running a 4-channel amp pushing 75W RMS or more per channel, the KM654L takes that power without distortion. The KM604WL tops out at 50W RMS, which pairs well with a 50–60W/ch amp or a powered head unit with a strong internal amp.
For most pontoon boat installs without a separate amplifier, the KM604WL is the right call. You won't outrun it.
System Pairings for the KM604WL
Head Unit: Kenwood DMX8709S or Sony XAV-9500ES. Both push 22W RMS x4 internally, which pairs perfectly with the KM604WL's 50W RMS rating. Clean, undistorted power from the receiver and the speakers will last for years. Amplifier: If you want to add a 4-channel amp, the Kicker KMA360.4 (90W RMS x4 at 4-ohm) is a slight overmatch for the KM604WL but still works cleanly if you're not pushing it to the limit. A better match is a 50–60W RMS x4 amp — the Kenwood KAC-M4004 marine amp fits that profile exactly. Subwoofer: For a complete system on a 16–20 ft boat, the Kicker KM10 10" marine subwoofer with a dedicated mono amp fills out the low end nicely without taking over the locker space.Want help spec'ing a complete system? The Bundle Builder walks through it step by step.
Real-World Scenarios
Pontoon on Lake Okeechobee: A customer running a 20 ft pontoon replaced the factory 6.5" speakers with four KM604WL units powered by the head unit alone. With the boat cruising at idle and low speeds, volume at 60% was loud enough to hear clearly across the deck. No amp needed. Two seasons in, no corrosion issues. Center console day boat in Miami: A 19 ft center console with two KM604WL speakers mounted in the gunwale. The owner paired them with a Kenwood KAC-M4004 amp. At 30 mph with the outboard running, the speakers were audible and clear — not concert loud, but definitely there. He's planning to add two more in the stern for next season.Frequently Asked Questions
Are the KM604WL speakers sold as a pair or individually?Individually. You'll need to add two to your cart for a pair. Most installs need 2–4 speakers total, so this gives you flexibility to mix and match quantities.
Do I need an amplifier to run these speakers?No. The KM604WL runs fine off a quality marine head unit. Most Alpine, Kenwood, and Sony marine receivers push 18–22W RMS x4 internally, which is within the KM604WL's comfortable range. An external amp will sound cleaner and louder, but it's not required.
Will these fit in my factory speaker cutouts?The KM604WL has a 6.5" (165mm) basket diameter and requires a cutout of approximately 5.625". Most factory 6.5" locations accept this directly. Always measure your existing cutout and mounting depth before ordering.
Are these speakers rated for saltwater?Yes. IP65 rated, sealed motor assembly, Santoprene surround, stainless grilles — they're built for saltwater. Kicker's marine warranty covers corrosion-related failure when speakers are properly installed.
Can I control the LED color without the Kicker controller?The speakers default to white LED on power. To change colors or set effects, you need the Kicker KMLC controller (sold separately). Some boaters also use third-party LED controllers with the appropriate connector.
Buy the Kicker KM604WL — Authorized Dealer, Ships Fast
Ocean Rock Audio is an authorized Kicker dealer based in Fort Lauderdale, FL. Every speaker comes with full manufacturer warranty support, and we know the product line well enough to answer actual installation questions.
$119.99 per speaker. In stock.Upgrading multiple components? Build your full system — speakers, amp, head unit — with the Custom Boat Audio Bundle Builder. Bundle pricing saves you money and everything is spec'd to work together.