What is the difference between the 4000 Series IFB System and the IFB system on the 862?
A 29. The 4000 Series is a complete IFB system. The 862 IFB feature is part of a system. To complete it, one must connect high impedance earphones, or for more level an amplifier and lower impedance phones. Another configuration using special wiring to integrate TW beltpacks or Model 4030 belt packs. The master station channels 7-12 may be selectively used for the IFB in this scenario.
