Poly Planar VHF External Speakers & Hailer Horns
Poly-Planar VHF External Speakers & Hailer Horns
When your VHF radio is tucked into the helm station and the engine is roaring or a gust is howling across the beam, the last thing you want is to miss a critical radio call. That's exactly the problem that Poly-Planar has long addressed with its lineup of compact, fully waterproof VHF extension speakers — purpose-built to push your radio's audio to wherever it's most useful on your boat.
Poly-Planar is widely recognized as one of the most trusted names in marine audio. The brand is known as a world-leading designer and manufacturer of waterproof and corrosion-proof audio systems for marine, outdoor, and boating applications, and that expertise carries directly into their VHF External Speakers & Hailer Horns category.
The MB-Series: Purpose-Built for VHF Communication
Poly-Planar's MB-series speakers are the heart of their VHF extension lineup. The MB-41 is a standout 4" standalone VHF extension speaker that earned the Practical Sailor Best Choice rating for conventional-style external speakers in an independent comparative test — recognized for its compact design, excellent sound quality, and two-year warranty. In testing, the MB-41 delivered measured output comparable to a two-stroke chainsaw at close range, making it genuinely audible above underway noise. The smaller MB-21 provides an 8-watt, 2" option ideal for tighter helm spaces where a full 4" footprint isn't possible.
Poly-Planar's MA-1000 extends the range further — a thin, dual-cone waterproof communications speaker rated at 20 watts and designed to function as a VHF radio extension in a slightly larger format. All of these models share the construction hallmarks Poly-Planar is known for: totally waterproof and corrosion-proof enclosures, ABS or polypropylene housings, and stainless steel grilles and mounting brackets that resist the salt, spray, and UV punishment of the marine environment.
Built for the Marine Environment
What separates Poly-Planar's VHF speakers from ordinary audio products is their uncompromising marine construction. Their speakers feature stainless steel grills, polypropylene cones, and plastic frames engineered to hold up over years of exposure on deck. The compact form factor of the MB-series makes mounting flexible — these speakers can be positioned virtually anywhere on the boat, from the helm dash to a T-top panel or overhead, giving the helmsman clear, immediate access to radio communications without needing to strain toward the radio itself.
Poly-Planar has also developed ultra-low magnetic field technology across their broader speaker line to avoid interference with onboard compasses and autopilots — a thoughtful engineering approach that reflects their deep understanding of the marine electronics ecosystem and the importance of keeping all instruments working in harmony.
Whether you're a weekend cruiser who needs to hear weather broadcasts above your outboard's whine, or a bluewater sailor who demands reliable cockpit audio in all conditions, Poly-Planar's VHF extension speakers offer proven, independently validated performance in a tough, purpose-built package.