Are there any Home Cinema amps that have a microphone input? I am installing a surround system in a small (70 seat) lecture theatre where they also need a microphone. At the moment we are looking at having seperate systems for the PA and the DVD sound but this will mean double the amount of speakers. An alternative would be to use a pre-amp power-amp combination and mix the microphone sound in before the power amp. But a Cinema amp with this facility built in would be ideal. Any ideas?