Thanks for your interest in Audio Wireless and as an engineer working there I thought I might be able to constructively add to this.
Firstly, Chris if you would like a demo please feel free to contact us, our door is always open at Borehamwood, Elstree Studios so we would be glad to show you our equipment personally.
Jon, I'm sorry we lost contact with you but I believe Aldo has now contacted you and the same offer applies.
Tim, I'm not sure what situation (frequency plan, environment etc) you were referring to regarding intermod problems in larger setups but we may be able to assist you to ensure you can get the most out of your equipment.
Each TV CH (8MHz) has a pre-coordinated frequency plan that allows for use of up to 12 channels of radio mics. By using appropriate antenna distribution systems, Tx power levels to suit the location & application as well as adjusting the Rx mute level (aka squelch), can you maximise your performance of multi-channel set ups.
I hope that helps,