Standard 220SW and 240SW hailer horns are marine-grade external speakers designed for use with VHF radios and loud hailers that provide a built-in hailer output. Both use a 4 Ohm impedance to support “listen-back” features on compatible hailers, allowing the horn to function as both an output speaker and a pickup for return audio from the deck or dock area.
Key Features
220SW: 30W, 4 Ohm horn for radios/hailers up to about 20W hailer output
240SW: 40W, 4 Ohm horn for use with any Standard loud hailer
4 Ohm impedance enables listen-back where supported
Suitable as external hailer speakers for marine communication and PA use