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Difference between a 72MHz and 216MHz system:
- FM systems transmit sound via radio waves (generally on 72-76MHz frequencies). They are ideal for classroom/meeting use and work well both indoors and outdoors. If multiple FM systems are used near each other, separate broadcast frequencies should be used. FM signals are not limited to line of sight and can penetrate walls and ceilings
- 72MHz systems generally have a shorter range - up to 1500ft. They have exceptional audio quality (30Hz to 17Khz) and are compatible with existing assistive listening system equipment
- 216MHz systems are generally for larger areas. They have a range up to 3,000ft and have good audio quality (30Hz to 10KHz). These systems are good for areas where interference may be a problem
About FM system
- FM systems transmit sound via radio waves (frequency modulation) from the speaker's microphone to the listener's portable receiver. For more on assistive listening systems
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