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Best Marine Audio Gear of 2020

Last updated on March 23, 2020

Our picks for this year’s best-of-the-best audio equipment for boats.

Rule #1 about buying audio equipment for your boat: if it’s not specifically made for life on the water, do not take it to sea. True marine audio gear is water-resistant, fog-proof, salt-proof and UV ray resistant. Marine receivers or head units come with coated circuit boards that don’t rust, rubber caps to cover all open inputs, and gasket sealed covers for all controls, knobs, and end caps. Marine speakers and subwoofers are built with plastic cones and rubber surrounds and come with weather-resistant mounting hardware. Anything less than true, marine-grade audio gear, and you’ll be tossing it before the season’s over. Rule #2: unless you own your own cruise ship, smart and efficient use of cabin space is critical, so look for an audio system you know will fit… while giving you the best possible bang for the buck. 

Below are our picks for the best of the best by category, as chosen by experts - one of whom is both a life-long sailor and a recent inductee into the Consumer Technology Hall of Fame: our own founder, Bob Cole. So… you ready? Let’s shove off… 

Questions along the way? Don’t hesitate to pick up the phone and talk to one of our audio technicians at 1.866.961.7781 or email us here.  We love this stuff and want to help.

2020 Marine Audio Deals

We’ve made it easy to find the best deals from brands like Sony, Kicker, Focal, JBL, Polk, and more. Our deals update daily so you don’t miss a beat, and we’ve got your back with our price match guarantee, 60-day returns, easy financing, and free shipping. Don’t see what you want on sale? Give us at 1.866.961.7781 or chat with an expert.

Shop This Guide

#1. The Best Marine Stereo Bluetooth Receiver: Sony DSX-M55BT Marine Media Receiver

Why it won

Let’s kick things off with this little over-achiever from Sony – a water-resistant, marine digital media receiver with a USB input and an auxiliary input that can simultaneously connect up to two compatible devices. Stream from your phone, iPad, iPod, or laptop with NFC technology (Near Field). To pair, just bump the NFC logo with your device, and you’re good to go. Then, bump again to disconnect. (Anything easy is a good thing at sea.) 

This friendly little receiver is SiriusXMTM satellite radio-ready, works with Pandora (iOS and Android) and gives you hands-free control of your iOS device via Siri voice control. It comes with a EQ5 equalizer and it’s expandable thanks to its RCA preamp outputs for external rear and subwoofer speakers. You can also control everything with the wireless remote, which is included. All that, at a hard-to-believe price plus World Wide Stereo’s Free Shipping and Happiness Guarantee.

Dimensions: 7.00 x 1.97 x 4.72 in (W x H x D) | Inputs: USB (Front), AUX (Front) | Internet Connectivity: Bluetooth® Version 3.0

Reg Price:   $98


#2. The Best 6.5-Inch Marine Speakers.: Infinity Kappa 6120m 6-1/2" 2-Way Marine Speakers - Pair

Why it won

Infinity’s Kappa Marine (6120) speakers are purpose-built for the water and come in the three most popular sizes for today’s modern boats. The 61/2-inch coaxial, the 8-inch three-way convertible speaker system, and the 10-inch woofer all have Plus One™ polypropylene woofer and midrange cones, mylar tweeter domes (save for the subwoofer), polymer baskets, sealed magnets, and rubber woofer surrounds. They also light up and can display seven colors out of the box or more when connected to an external lighting controller.

We like the 6120s for their signature Infinity sound – rich, full-bodied and powerful enough to cut through all sorts of engine, wave, and weather noise. (The Kappas may just be the loudest 61/2-inch boat speakers we’ve ever heard.) They’re also built to take a beating; Infinity’s own testing includes freezing, baking, shaking, and blasting with ultraviolet light while spraying with salt water for days at a time – all with the speakers on and playing at full blast.

Great sounding, great looking, and 100% seaworthy. What more can you ask?

Size (in inches): 6 1/2" | Power Handling: 100 watts RMS, 300 watts peak | Sensitivity: 92dB | Frequency Response: 40Hz - 25kHz | Impedance: 3 ohms

Reg Price:   $299.95


#3. The Best Marine 4 Channel Amp: Kicker 45KMA3004 4-Channel 75 x 4 Marine Amplifier

Why it won

Kicker’s 45KMA3004 4-channel amp is extremely compact – 25/16 H x 71/8 W x 127/16 L to be exact – and it can do a lot. Use it to power two pairs of speakers, or a pair of speakers and a subwoofer, or even a high-performance set of 4-ohm speakers. And, if you’re just looking to power a couple of big, power-hungry speakers, you can feed the pair 150 watts by bridging the amp and putting it in 2-channel mode. (The 45KMA3004 also features Kicker’s KickEQ™ bass boost technology to help boost bass response, which is always tricky on a boat.)

 Inside, Kicker’s conformal-coated circuit board keeps moisture out, though we still recommend stowing the amp in the driest spot possible on your boat –  ideally in a cabinet that offers some sort of ventilation. Mounting hardware comes included. And, if you’re building a custom system from scratch, we recommend adding a pair of Infinity Kappa 6120M speakers.

Watts: 40 watts x 4 at 4 ohms, 75 watts x 4 at 2 ohms | Channels4-channel

Reg Price:   $224.76


#4. The Best Marine Amplifier to Power Your Subwoofer: Kicker 45KMA6001 Monoblock 600-watt Marine Amplifier

Why it won

There’s a funny boat scene in HBO’s The Sopranos, where Tony Soprano drops anchor 20 / 30 yards away from an expensive beachfront house that he wants to buy. The current owner doesn’t want to sell, so Tony parks his yacht and starts playing Dean Martin at deafening levels, for hours at a time, to drive the homeowner out. It’s a classic Soprano’s scene, but more to the point: the music coming from the boat is loud and sounds absolutely amazing. And, if we had to guess what amp Tony bought, we’d say it was Kicker’s 45KMA6001.

The 45KMA6001 is small, built for life on the water, and VERY powerful – 600 watts at 2 ohms powerful – enough to drive even the biggest subwoofer. Highlights include: input level control, bass boost, an on-board, low-pass crossover, and a wired remote bass knob which lets you dial-in optimal bass where you want it. And just like its smaller, less expensive brother, the Kicker 45KMA3004, the circuitry is all conformal coated to stay dry always. 

Bottom line, as Tony liked to say (minus the colorful superlatives): “go big, or go home.” And, when it comes to great-sounding music on the water, we couldn’t agree more.

Watts: 300 watts x 1 at 4 ohms, 600 watts x 1 at 2 ohms | Dimensions (in inches): 2-5/16H x 7-1/8W x 8-1/16L

Reg Price:   $269.76


#5. The Best 4-inch Marine Coaxial Speakers: Kicker 45KM42 4" 2-Ohm Marine Coaxial Speakers - Pair

Why it won

A coaxial speaker is a speaker where the high-frequency reproducer, the tweeter, is mounted at the center of – and on the same axis as – the low frequency reproducer, the woofer. That way, you get the full frequency spectrum of sound from any one speaker location. So, if you’re just looking to replace your boat’s stock speakers (which 99 times out of 100 are cheap / inferior / etc.) a couple of Kicker coaxial 45KM42s are just the ticket. The result: significantly better sound – clear, clean highs with solid bass tones – for very little money. 

Kicker’s 45KM42 are built with walter, salt, fog, and the sun in mind: the woofers are UV-treated polypropylene with Santoprene™ surrounds and the titanium dome tweeters do extremely well in harsh conditions. Even the stainless steel mounting hardware is weather resistant. An added bonus: speaker grilles are available in white or charcoal gray. 

All in all, good stuff that would easily sell for twice as much… but shhhh

Size (in inches): 4" | Power Handling: Up to 50 watts RMS, 150 watts peak | Sensitivity: 89dB | Frequency Response: 60Hz – 20kHz | Impedance: 2 ohms

Reg Price:   $79.76


#6. The Best 10-inch Marine Subwoofer: Kicker 45KMF102 10" 2-Ohm Free-Air Marine Subwoofer

Why it won

Kicker’s 10-inch, 45KMF102 Marine subwoofer is “free-air” sub, which means it doesn’t require a sealed enclosure to work. You can mount in a bulkhead, or a cabinet, or any out-of-the-way place, which is great if space is a premium on your boat. In every other respect, the Kicker 45KMF102 is the same as the Kicker 45KM122, save for the price: the 10-Inch version obviously costs less.

Woofer Size (in inches): 10" | Power Handling: Up to 175 watts RMS, 350 watts peak | Sensitivity: 86.2dB | Frequency Response: 30Hz –500kHz | Impedance: 2 ohms

Reg Price:   $149.95

#7. The Best Boat Sound Systems: Sony DXS-M5511BT Receiver and Speaker Combo

Why it won

Sony’s DSX-M55BT marine-grade digital media receiver offers a boatload (sorry!) of features and capabilities, but its principal job is streaming your favorite music from your favorite devices via a USB connection – or wirelessly via a Bluetooth connection. Pairing is easy thanks to one-touch NFC connectivity, and the receiver also comes with a hands-free mic built-in, so you can ask Siri to play your songs while you’re busy doing important Captain stuff. Also included: a pair of Sony’s XS-MP1611, 61/2 -inch marine-grade coaxial speakers with removable grilles. 

The media receiver provides 17 watts x 4 (55 watts x 4 peak output) to power the speaker system, with up to 65 watts of continuous power handling. There are front USB and Auxiliary inputs (one each), a radio, a built-in equalizer with 8 presets – and 2 sets of pre-outs (2-volt rear and subwoofer) for system expansion via an amplifier. Or, if you’re ambitious: amplifiers. Bottom line: this is Sony-level quality made specifically for boats, and that comes through loud and clear on the water. The system sounds great.

Dimensions (in inches): 7.00 x 1.97 x 4.72 in (W x H x D) | Inputs: USB (Front), AUX (Front) | Internet Connectivity: Bluetooth® Version 3.0 |  Power HandlingUp to 65 watts

Reg Price:   $138


One more thing... 

Once you pick out your marine audio gear, a last word of advice: buy from a trusted dealer, and the more experience / the longer the track record, the better. A good dealer will take care of you in the event anything happens. (See our “Happiness Guarantee,” right here.)

Speaking of trusted dealers… 

World Wide Stereo is home to some 90+ industry-leading audio/video professionals who love what they do, and talking about it, too. We opened our doors in 1979, gained a small yet diehard following, won a slew of national awards for everything from killer car audio installations to customer service, grew the business online… and today we enjoy a faithful following of like-minded TV-watching, music-listening, gear-loving defenders of fun for the whole family. Our only rule: no one leaves unhappy. And P.S.: we’re brutally honest when it comes to this stuff. Want to know if something is as good as advertised - even if you're shopping somewhere else? Call us or stop by one of our showrooms — we’ll give it to you straight.  

Until next time: turn the music up, have fun, and be safe – make sure everyone has a life jacket – including the dog!

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