Standard Horizon
Standard Horizon SSM-21A Submersible Speaker Mic with Ear Jack
Best submersible microphone for marine radio users needing private, clear communication.
Enhance your marine communication with the Standard Horizon SSM-21A Submersible Speaker Microphone. Designed for durability and ease of use, this microphone features a heavy-duty belt clip for secure attachment and clear audio transmission and reception. It is compatible with a wide range of Standard Horizon HX series radios, including the HX890, HX400, HX400IS, HX380, HX40, and HX210, making it a versatile accessory for your communication needs on the water. This model also includes an earphone jack for private listening.
$60.99
Owner Satisfaction
4.6
/ 5
Category Rank
187
/ 1072
#187 in Communication Radio Accessories
Price vs Category Average
-39%
Below average
Manufacturer
Standard Horizon
/ Standard Horizon
Who it's for
- Marine professionals working in wet or stormy conditions
- Users needing discreet communication in high-noise environments
- Active operators requiring hands-free radio access
Who should skip it
- Owners of non-Standard Horizon radio equipment
- Workers operating in extremely loud industrial settings
- Field users needing heavy-duty, long-term cable durability
Performance breakdown
Marine Durability
IP67 rating ensures reliable performance in harsh, saltwater environments.
Audio Clarity
Noise-canceling technology delivers crisp communication even in windy conditions.
Device Compatibility
Seamlessly integrates with a broad range of Standard Horizon handheld radios.
Ergonomic Design
Heavy-duty clip keeps the unit secure during active deck work.
Private Listening
Integrated earphone jack allows for discreet monitoring in quiet settings.
Build Quality
Rugged construction stands up to the demands of daily marine use.
Key Specs
Manufacturer
Standard Horizon
Model Number
SSM-21A
Accessory Type
Microphone
Microphone Type
Speaker Microphone
Connector Type
Threaded Single Pin 4 Conductor Connector
Cable Length
3.3 Feet (1 Meter)
Waterproof Rating
IPX7
Noise Cancellation
Yes
Features
- Submersible design for marine environments
- Improved transmit audio clarity
- Integrated earphone jack for private listening
- Heavy-duty belt clip for secure attachment
- Durable construction for demanding conditions
- Clear audio transmission and reception
- Direct replacement for SSM-14A
- Wide compatibility with Standard Horizon radios
What customers say
Customers highly value the Standard Horizon SSM-21A Submersible Speaker Mic for its exceptional reliability and audio clarity in marine settings. The core strength is its dependable waterproof performance, ensuring crisp communication transmission and speaker output even amid wind and wet conditions. Users appreciate the added utility of the ear jack for private listening. While the overall build quality is robust, a few long term users note the belt clip mechanism can sometimes fail under stress. Despite this minor point, satisfaction remains very high. Reviewers agree the SSM-21A justifies its cost by serving as a necessary, flawless safety tool that integrates seamlessly with compatible radios during harsh water use.
Know before you buy
Yes, it carries an IPX7/IP67 rating, meaning it is designed to be submersible in water, making it ideal for marine environments where splashes or accidental drops are common.
The SSM-21A is compatible with a wide range of Standard Horizon HX series radios, including the HX890, HX400, HX400IS, HX380, HX40, and HX210.
Yes, the microphone features an integrated earphone jack, allowing you to plug in a compatible earpiece for private listening in noisy or crowded environments.
Yes, the SSM-21A is the direct replacement for the SSM-14A and offers improved audio clarity and construction for demanding marine conditions.
The microphone comes with a 3.3-foot (1-meter) cable, providing enough length for comfortable use while the radio is clipped to your belt or stored in a pocket.
Yes, the SSM-21A includes built-in noise cancellation technology to ensure your transmissions remain clear even when you are operating in windy or high-noise marine settings.
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$61