Complex sentence: Seven pin XLR connectors are used to connect some valve (tube) condenser microphones to their power supplies (carrying signal, polarisation voltage, heater and HT); and by several models of Le Maitre and Ultratec fog machines for remote control.
Split into simpler sentences: Seven pin XLR connectors are used to connect some valve (tube) condenser microphones to their power supplies (carrying signal, polarisation voltage, heater and HT). Used by several models of Le Maitre and Ultratec fog machines for remote control.