With TOA systems you can have 8 systems – stretching to 12 using channels 39 & 40.
With Trantec you can have significantly more – it depends on which system, S4/S5, you are thinking of using. We would recommend you contact TOA/Trantec for further details.
This depends on how close the two rooms are, but generally speaking they would need to be 100M+ apart to prevent interference. The physical makeup of the room does have an effect but both TOA and TRANTEC systems are very good at ‘walking through walls’. If you do need multiple wireless systems in say a school type situation then we would recommend using Infra Red systems Click here for more information on Infra Red Systems