Rockville RWB70B 6.5ft Marine Wakeboard Tower Speakers - True RMS

In this review of the Rockville RWB70B pair, the bottom line is simple: these are built-for-water tower speakers for boat and off-road roll bar use that deliver reliable, loud, and clear sound without inflated power claims. They suit boat owners and watersports enthusiasts who want a truly marine-grade 6.5' two-way speaker with a rotatable 360 swivel mount and honest RMS ratings. The review finds the speakers notable for rugged stainless mounting hardware, sealed terminals, and a strong midrange tweeter that keeps voice and music intelligible over wind and engine noise.

Key Features

• True RMS power: Rated at 150 watts RMS per speaker, these deliver realistic continuous output so you know what to expect during extended use.
• Marine construction: Fully marinized materials and sealed terminals prevent corrosion and damage from salt or fresh water exposure for long service life.
• 360 swivel mounting: Adjustable nylon bracket reinforced with embedded steel and stainless hardware gives secure, rotatable placement on wakeboard towers and roll bars.
• Two-way fidelity: A 1' polyimide dome neodymium midrange tweeter plus polypropylene mica injected cone offers a clear vocal range and durable cone performance.
• Built-in crossover: The integrated two-way crossover simplifies installation and tuning so the drivers operate in the intended frequency bands.
• Wide compatibility: Fits bars from 1.26' to 2.87' and includes screw sizes for common roll bars and Jeep wrangler mounts.

Who It's For

These speakers are best for boat owners, wakeboarders, and off-road enthusiasts who need true marine-grade components, stainless mounting hardware, and a speaker that can withstand salt, spray, and direct exposure. The clear midrange and 96 dB sensitivity make them a good match for systems that must cut through wind and motor noise while remaining easy to install on towers or roll bars.

They may be less suitable for users seeking ultra-compact or discrete speakers, since some customers find the 6.5' enclosures large for smaller boats. Audiophiles seeking deep, subwoofer-level low end should pair these with a dedicated marine sub rather than relying on the mid-woofer alone.

Pros & Cons

Pros

• Strong, honest RMS ratings give predictable continuous power handling for real-world use.
• Durable, fully marinized build with sealed terminals and stainless mounting hardware resists corrosion.
• Clear vocal presence from the polyimide dome tweeter and good overall value for the features included.
• Easy to mount and swivel to direct sound where needed on towers and roll bars.

Cons

• Physical size may be bulky for very small boats or users wanting low-visibility installs.
• As a two-way 6.5' speaker, it will benefit from a separate sub for true deep bass performance.

Specifications

Driver Size	6.5' two-way
Peak Power	250 W per speaker
RMS Power	150 W per speaker
Frequency Response	70 - 20,000 Hz
Sensitivity	96 dB @ 1w/1m
Impedance	4 Ohms
Mounting Depth	9'

Our Verdict

The Rockville RWB70B pair is a practical, well-built marine wakeboard speaker set that backs up its claims with honest RMS ratings and durable, corrosion-resistant hardware. Boat and watersports owners who need loud, clear sound on a tower or roll bar will find these a strong value, while those wanting compact stealth installs or heavy bass should supplement with a dedicated marine sub.

Frequently Asked Questions

Do these speakers resist salt water?
Yes. The RWB70B are fully marinized with sealed terminals and stainless mounting hardware to resist salt and fresh water exposure.

What bar sizes will they fit?
They fit bars ranging roughly 1.26' to 2.87' and include 65mm and 80mm screws to accommodate common roll bars and Jeep wrangler bars.

Will these provide deep bass?
As 6.5' two-way speakers they offer clear midrange and highs but will benefit from a separate marine subwoofer for strong low bass.