Best Marine-Grade Boat Subwoofers

Why I picked it

JL Audio makes some of the best subwoofers on the market. But when it comes to big-time bass on your boat, you used to be stuck installing subs designed for your car — not ideal in hot, damp and salty environments. Now JL has brought ground-pounding subs to the water, complete with the latest advances in waterproofing and sealing. We did a first look on the 12″ version.

The specs are off the charts: an all-new frame and spider combined with 2″, 4-ohm voice coils and a specially formulated, UV-resistant surround. It has Transflective LED lighting that shines through the cone in seven colors, and peak/RMS ratings that exceed virtually anything out there. To put it simply, this is THE subwoofer you need, especially in a free-air application.

The M7 comes with six grille options in two colors to fit your boat. It's designed as an infinite-baffle sub, and JL cautions that extra attention to the mounting surface is essential for proper performance.

Why I picked it

Wet Sounds builds some of the best-protected marine gear against salt spray, fog and UV, and backs it with industry-leading tech to help you build the ideal sound environment onboard.

The REVO-series subwoofers come in three configurations, numerous sizes and impedance ratings. For boaters looking to absolutely bump the beach, REVO has the power you're after — the top-of-the-line Revo-XXX subs deliver absurd power handling comparable to a competition sub. Free-air and enclosure models share similar specs: 400–500W RMS from the 10″ & 12″, 2Ω and 4Ω setups, and fully sealed, waterproof motors and magnets. Santoprene is used on both the surround and the spider for long-lasting resistance to the elements.

Why I picked it

Kicker is one of our favorite brands to install — we recommend their gear to our own friends and family (see our KMF Series review and Lightning speedboat stereo upgrade). When you buy a sub for your boat, you need to know it'll hold up to serious abuse — spray, salt, fog and getting cranked up — and the KM-series doesn't disappoint.

Kicker starts with a proven, ground-up design: a UV-treated polypropylene woofer with a Santoprene surround for long-term durability, and a motor fully sealed from the elements. They offer these in different resistances and both enclosure and free-air designs — a free-air sub can be particularly wonderful on boats that lack the space for an enclosure while still producing wave-making bass.

Why I picked it

You may know Rockford Fosgate more for tough car and home audio, but with the M2-series marine subs the things you love about RF come on the water. The M2 is Rockford's latest flagship marine-grade sub — designed for marine, with multiple sizes, both enclosure and free-air setups, and several resistance ratings.

All M2-series subs use dual voice coils for superior sound without distortion. Rockford certified them extensively: IPX6-rated for constant water and moisture, ASTM-certified to resist salt and fog for 500 continuous hours, and Klippel certified for power, sound and efficiency. And if you want visuals to match the bass, the Color Optix app-controlled lighting provides near-infinite customizable light shows.

Why I picked it

Clarion has been in the marine business a long time, and their CMSP-series subs are a ground-up innovation released in 2020. Available in a 10″ infinite-baffle design with 2Ω and 4Ω variants, they're fully marinized for years of abuse — Clarion even sealed the speaker connectors to prevent corrosion in wet environments. A mica-filled polypropylene woofer ensures water resistance while the Santoprene surround withstands UV, salt and fog.

The long-excursion design provides excellent low frequencies without distortion, helped by a special polymer basket and marine-grade synthetic spider. The CMSP includes RGB lighting (seven colors) with an optional controller. The only downsides: there's no 12″ model, and the grilles are sold separately.

Why I picked it

The Infinity Reference series are some of the best speakers and subwoofers we've heard in car audio, so we were excited when Infinity introduced a marinized version. The 1022 ML-series are 10″ subs that produce some of the cleanest, most accurate bass tones possible — Infinity's rigorous testing gives unparalleled consistency, which matters on a boat where out-of-sync tones make bass sound muddy.

The 1022 ML is best used as a free-air sub — its sealed motor and marine-grade components act like a baffle, so you don't need a massive box. It comes in white or titanium with built-in LED lighting (seven colors), uses a one-piece polymer basket and rubber surround, and carries an IPX5 rating, so it'll take salt, spray, fog, even the occasional wave. The only thing missing is a 12″ — for now it's 10″ only.

Why I picked it

One of the biggest challenges in building a great boat system is affording it — with some subs costing $500–$1,000 each, your on-the-water stereo can quickly exceed the value of your boat. Polk Audio takes the financial fret out of the equation with the DB+ series, priced around $100 even for the largest, most powerful sub in the line.

Inexpensive gear is great, but it's gotta work too — and Polk made sure these won't let you down. The series comes in 8″, 10″ and 12″ with single and dual voice coils, with excellent frequency response and better-than-expected RMS handling. Polk keeps it simple — no LED lighting, no color options — just a solid, dependable, well-engineered sub at an unbeatable price.