The FM-AV4 Portable Wireless Sound System consists of an FM870 combination wireless receiver/amplifier/speaker with a rechargeable battery pack, an M170 belt-pack transmitter and a microphone. Optional microphones, transmitters and accessories are available. These items will be discussed elsewhere in this manual.
The FM-AV4 features a VHF high band wireless microphone system with excellent operating range, freedom from “dropouts” and interference from other radio transmissions. The built-in receiver provides high selectivity and sensitivity with an automatic squelch circuit which requires no adjustment by the user. The M170 belt-pack transmitter uses the microphone cord as the antenna which eliminates the dangling wire antenna found on many other transmitters. The transmitter features a gain adjustment to perfectly match your voice with the microphone.
