8 Best Marine Subwoofers – Reviews and Boat Subwoofer Buying Guide

Best Marine Subwoofers

Spending a day out at sea can be a marvelous way to relax or catch up on quality time with friends. Your yacht may even be an ideal place for an engagement party or your kid’s sweet 16. The only issue is that the bass on your sound system might not hold up against the sound of the sea.

For that reason, why not consider installing a marine subwoofer? With one of these speakers, your sound will be more powerful than ever before and you can host parties your guests will remember for years. Even if you’re simply relaxing, don’t you want to feel the music?

We’ll tell you everything you need to know to select the best marine subwooder and the best ones on the market right now. Maybe you’ll be tempted to take your boat’s sound to the next level.

Why Your Audio System Will Always Sound Better with A Subwoofer:

A subwoofer is a speaker that’s capable of handling lower frequencies. As a result, it captures bass and sub bass more dynamically, giving you rounder sound & fuller music experiences. Your audio system is enhanced because many sound systems aren’t able to reproduce such low frequencies, so with a subwoofer, you retain the tonal quality of your music.

If you want to hear every beat of your sound system, it’s highly recommended to add a marine subwoofer. The bass will be deeper which will enhance the atmosphere on your boat.

Here are our picks for the best marine subwoofers you can buy:

1. Alpine SWR-M100 Marine Subwoofer


SWR-M100 - Alpine 10

BEST OVERALL BOAT SUBWOOFER

Once you’re on the water, it’s important that your subwoofer is durable and can withstand the elements. The Alpine subwoofer withstands the worst weather conditions so it’ll be reliable whether you’re out on a sunny day or if there’s a storm brewing. Even the hidden screw grille is resistant against salt corrosion so you never need to be concerned with humidity or fog.

Along with its durability, this boat subwoofer also has a high peak power rating so you’ll be guaranteed full bass. It takes a lot to damage this speaker and you’ll have peak sound quality, making it one of the best marine subwoofers available. It might be a bit pricey, but its high standard makes this cost worthwhile.

If you want to know more about the Alpine marine subwoofer, here are a few features:

  • Power Rating: 300 - 900W Watts RMS
  • Impedance: 4 ohms
  • Frequency response: 35-1000 Hz
  • Size: 10”
  • Marine Certification: UV certified, NEMA rated water resistance & ASTM approved

PROS

  • Extremely durable
  • Allows for leak free installation
  • High power rating
  • Custom high-strength polypropylene cone
  • Resists salt & fog corrosion

CONS​​​​​​

  • A bit pricey
  • Requires a sound box 

2. JL Audio Subwoofer M12IB6-SG-WH


JL Audio Subwoofer M12IB6-SG-WH

Best High-End Marine Subwoofer

The JL Audio M12IB6-SG-WH subwoofer is suitable for small or bigger boats. No matter where you place this unit it will deliver crisp clear bass that will enhance the sound of all your favorite songs. The design of the JL Audio M12IB6-SG-WH unit is aesthetically pleasing and will blend in with the interior of your boat.

JL Audio’s M12IB6-SG-WH marine subwoofer has an integrated 4" voice coil and a robust suspension so it can handle higher levels of bass. The system inside the subwoofer includes a polypropylene cone with synthetic rubber surround that provides high-quality sound and protection from corrosive environments.

Here are a few additional specs for the JL Audio M12IB6-SG-WH unit:

  • Power output of 100W to 600W RMS
  • Impedance: 4 Ohms
  • Size 12"
  • Marine certificate: Waterproof

PROS

  • Comes with mounting equipment
  • Highly durable with runner surround
  • Sleek design

CONS​​​​​​

  • Doesn’t have a protective casing
  • This unit is expensive

3. Bazooka MBTA10250D Marine Preloaded Bass Tube


Bazooka MBTA10250D Marine 10-Inch 250 Watt Pre Loaded Bass Tube

BEST COMPACT MARINE SUBWOOFER

If you’re looking for a boat subwoofer that’s small and compact, then the Bazooka is the one for you. Its peak power rating is lower than some models, which makes it ideal for easy listening while its low impedance allows this system to double your bass.

Because of its Velcro reinforced mounting straps, it’s easy to install and its chrome plated finish gives it a sophisticated look that will add style to your boat. This stainless steel speaker will back up your sound system and won’t be damaged by salt, fog or turbulent weather.

Here are a few notable features of the Bazooka:

  • Power Output: 275W
  • Impedance: 4 ohms
  • Size: 10”
  • Marine Certification: UV certified & waterproof

PROS

  • Velcro straps make it easy to install & uninstall
  • Low impedance
  • Stainless steel hardware design is weather & waterproof

CONS​​​​​​

  • Low power rating equals less volume
  • Expensive

4. Kenwood P-WD250MRW Marine Subwoofer and Amplifier Package


Kenwood P-WD250MRW 10-Inch Marine Subwoofer and Amplifier Package

BEST MARINE SUBWOOFER AND AMPLIFIER PACKAGE

The Kenwood marine subwoofer may have a very low power rating but its impedance is so small that it’s capable of immense volume. This package also includes a Kenwood amplifier so your bass and sound needs are sorted.

On top of this, it’s easy to install and it’s suitable for a small boat or pontoon. The sound quality is crisp & clear and it’s also so light that you don’t have to worry about any long term damage to the integral structure of your boat. For a subwoofer and amplifier combination, it’s highly affordable.

If you want to know the specifications of the Kenwood, here they below:

  • Power Output: 200W
  • Impedance: Two 1,5 ohm coils
  • Size: 10”
  • Marine Certification: Yes

PROS

  • Extremely low impedance
  • Includes an amplifier
  • Reliable sound performance

CONS​​​​​​

  • Low power rating
  • Isn’t waterproof

5. Rockville MS12LW Marine Subwoofer


When it comes to power, there are very few marine subwoofers like the Rockville that can rock your boat. This device’s peak power rating goes into the thousands, giving you immense bass that you can feel when you listen to it. Even though the impedance may be a bit high, the 100 Oz magnet is larger than other models on the market, which means it can handle any type of noise.

Not only is it powerful, but its elegant design is durable and waterproof so it can handle a great deal of wear & tear. Even if you jump on it, it won’t break and will still sound impressive.

Here is everything you need to know about the Rockville:

  • Power Output: 700 – 2800W Watts
  • Impedance: Two 4 ohms
  • Size: 12”
  • Marine Certification: UV certified & waterproof

PROS

  • Capable of extremely powerful bass
  • Strong magnets enhance its sensitivity & noise capability
  • Polypropylene cone with Rubber edge
  • Highly affordable
  • Stylish, durable design

CONS​​​​​​

  • High impedance
  • Sound distorts at high volumes

6. Fusion MS-SW10 Marine Grade Subwoofer


Fusion MS-SW10 10-Inch 400 Watt Marine-Grade Subwoofer

BEST MARINE GRADE

The Fusion 10 inch marine grade subwoofer holds the True Marine Standard badge meaning that it’s undergone various degrees of testing to ensure it will withstand different weather conditions. As a result, this product is water resistant and will still maintain high quality even if exposed to salt or fog.

Its decent power rating means that it’s capable of acceptable bass while not being overpowering so you can enjoy your music experience. Because it’s relatively affordable, it makes an ideal system for your boat without breaking the budget.

Here are some notable features of the Fusion subwoofer:

  • Power Output: 400W
  • Impedance: Four ohms
  • Size: 10 inch
  • Marine Certification: UV rays & ASTM certified as well as water resistant

PROS

  • Suitable for marine conditions
  • Easy to install

CONS​​​​​​

  • Lacks bass power

7. Rockville RW10CA 10" 800 Watt Slim Low Profile Active Subwoofer


Rockville RW10CA 10" 800 Watt Slim Low Profile Active Powered Car Subwoofer Sub

Best Lower Profile Subwoofer System

The Rockville RW10CA has an ultra-slim design that allows you to store it anywhere on your boat. The level of bass that the Rockville RW10CA produces is impressive for a unit that’s so compact. This subwoofer transmits a crisp clean sound with no distortion or white noise.

Rockville’s RW10CA subwoofer is easy to install because of its high-quality input that doesn’t require you to remove the receiver. Simply use the input to wire the RW10CA subwoofer to your speakers. The design of the Rockville RW10CA subwoofer allows for a clean and easy installation because the input & output wires are all on one side.

There are volume, phase, and boost controls as well as a subsonic & low pass crossover filters that allow you to customize your sound. Take a look at these additional features the Rockville RW10CA can offer you: 

  • Power output of 800W
  • Impedance: 2 Ohm
  • Size 10 inch wide and 2.7" thick
  • Marine certificate: Yes

PROS

  • Easy installation
  • Customize sound control and filters
  • Has thermal protection
  • Compact design

CONS​​​​​​

  • Had missing parts
  • Sound is difficult to customize

8. MTX Audio RT8PT Universal Powered Subwoofer Enclosure


MTX Audio RT8PT Universal Powered Subwoofer Enclosure

Best Subwoofer Enclosure System

The MTX Audio RT8PT 8 inch marine subwoofer is the perfect unit to install in smaller boats that need a boost in clear bass and sound. This 8" high-performance subwoofer has a carpeted enclosure so that it blends in with the interior of your boat and provides a durable casing.

Installing the MTX Audio RT8PT subwoofer is effortless because the high-level RCA input allows you to connect the unit in any setup. This subwoofer comes with mounting equipment to secure the unit in place anywhere inside your boat.

You can customize the level of bass you want by using the external control on the MTX Audio RT8PT subwoofer. It comes with a wired remote so you can control the volume and the level of bass easily. Take a look at the additional specs below for the MTX Audio RT8PT subwoofer:

  • Power output of 120W to 360W maximum 
  • Impedance: 2 Ohm
  • Size 8"
  • Marine certificate: Not waterproof

PROS

  • Integrated AMP system
  • External bass control
  • Durable enclosure

CONS​​​​​​

  • Doesn’t produce the biggest bass output
  • Poor packaging

Buying Guide and Things to Look For:

Here are a few of the features you should look out for when buying a marine subwoofer:

Power Rating: 

The volume of your subwoofer depends on how high the power rating is. If you’re looking for casual listening, any power rating higher than 100W RMS power rating is suitable. On the other hand, if you’re planning a party or you want music to fill the air around your boat, then it’s preferable to find a system that at least has a rating of 300 – 500W. The higher, the better.

Impedance: 

To put it simply, impedance refers to how easily electricity passes through the coils in your subwoofer. If the impedance is low, it means your sound will more powerful. An ideal impedance for a marine subwoofer is four ohms but if you can find one that’s lower it’s even more preferable.

Size: 

If your subwoofer is too heavy it might weigh down the structure that it’s installed on which will damage your boat but if it’s too small it will hamper the sound quality. For your boat, a suitable marine subwoofer should at least be 10” – 12”. This will ensure that it’s light enough but will also produce voluminous sound quality.

Marine Certification & Waterproofing: 

Even if you install your subwoofer inside your boat, it can still be damaged by moisture in the air. Ensuring that it’s marine certified for free-air applications & waterproof will enhance its longevity so you don’t have to replace it for a long time.

Brands:

There are several manufacturers of high quality marine subwoofers that you should consider. They include:

  • Apline 
  • JL Audio
  • Fusion
  • Rockville
  • Rockford Fosgate
  • Polk Audio

Installation:

In order to install your subwoofer, you should follow these three steps.

Step One:

Build a subwoofer box in order to contain the sound and protect your speaker. You can do this by making your own one or by using an existing panel on your boat for this purpose.

Step Two:

Either surface mount your subwoofer to prevent any wires from sticking out or use the mounting accessories provided with your speaker. You must make sure that it’s fitted securely but that it’s still easily accessible.

Step Three:

Wire your subwoofer. You can either wire it in parallel or series which will impact the sound quality. Parallel will reduce impedance while series is easier to install. Once your speaker is wired you can power it up and begin using it.

Powering A Sub:

In order to power your subwoofer, you need to connect both the power and ground wires to a battery. This is different from a car subwoofer where only the power wire is connected to the battery and the ground wire is attached to a metal surface. The benefit is that this makes it easier to use a subwoofer on your boat.

Final Thoughts:

With any of these marine subwoofers, your music will be heard across a great area on open waters. It’s a fun way to enhance your parties and lose yourself in the music.

Marine subwoofers are easy to install and you can even find decent ones for affordable prices. What’s holding you back? We hope that our guide helped you find the best marine subwoofer for your boat.

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