STANDARD HORIZON MH-57A4B Microphone Speaker – Repair & Replacement by SEANAV India
The STANDARD HORIZON MH-57A4B is a tough and compact speaker microphone. It is made for use with marine handheld radios. Thanks to its waterproof design, it performs well even in rough sea conditions.
Over time, the mic can get damaged. Water exposure, frequent use, or dropped equipment can cause audio problems. As a result, communication becomes unclear or stops working completely.

SEANAV India provides expert repair and replacement services for the MH-57A4B. If your microphone is not working properly, we can fix or replace it quickly. Our team supports both individual sailors and commercial marine fleets.
We stock tested MH-57A4B microphones. They are fully compatible with radios like the HX290, HX370S, and HX471. Each unit is checked for sound quality, waterproofing, and durability. Therefore, you receive a mic you can trust.
Why Choose SEANAV?
- Original and tested mic replacements
- Skilled repairs for broken cords, weak audio, and water damage
- Fast shipping within India and abroad
- Support for marine fleets, shipbuilders, and repair technicians
- Affordable and long-lasting solutions
Moreover, we offer refurbishment services for mics with minor issues. Instead of buying new ones, you can repair and reuse them. This not only saves money but also reduces waste.
In addition, SEANAV helps you choose the correct microphone for your radio. If you’re unsure about compatibility, our team can assist. We make the process smooth and efficient.
For more than 10 years, SEANAV has supported marine communication systems across India. As a result, we understand what marine users need—reliability, speed, and expert help.
Don’t wait until your communication fails at sea. Contact SEANAV today. Let us handle your MH-57A4B microphone repair or supply needs with speed and care.
Frequently Asked Questions (FAQs)
1. What is the MH-57A4B used for?
It is a speaker microphone made for STANDARD HORIZON marine handheld radios.
2. Is the microphone waterproof?
Yes. It is built to resist water, making it ideal for marine conditions.
3. Which radios are compatible?
It works with HX290, HX370S, HX471, and other similar STANDARD HORIZON models.
4. Does SEANAV repair these mics?
Yes. We fix common problems like static, broken wires, and low volume.
5. Do you offer refurbished microphones?
Yes. We provide fully tested refurbished mics that perform like new.
6. How long does shipping take?
Orders are usually shipped within 2 to 5 working days, depending on your location.
7. Can I buy in bulk?
Absolutely. We supply to fleet operators, shipyards, and service engineers.
8. How do I know if my mic is faulty?
If you hear static, have low sound, or the mic does not transmit, it may need service.
9. Are the replacement parts original?
We offer both original and high-quality compatible options.
10. Do you ship internationally?
Yes. We serve clients in India and other countries.
11. How can I contact SEANAV?
You can reach us via our website or email. We respond quickly to help with orders and questions.
SEANAV – Keeping your marine radio systems loud and clear, wherever you sail.

