A powerful output stage delivers a total of 1,500 mW of audio providing more than adequate audio level for support of up to eight users, or more with optional A770 or A775 eyebrow panel through the controller expansion bus The A710 and A711 support up to six transceivers plus PA which can be a 7th transmit position and support all headset impedances from 8 to 600 Ohms. Individual transceiver status enunciation provides quick confirmation of selected transceiver(s). Both units offer simulcast capability for up to three transceivers. The A710 requires that audio input levels be set at each individual transceiver while the A711 provides separate panel level controls for all transceiver inputs.