We've done events in the past with up to 24 channels, but the sky's the limit!
Essentially, the number of channels is equal to the number of transmitters, it's just a matter of using different frequencies.
However many you need, we can come up with a solution. Don't believe me? Give us a call on 0207 0603 653 or drop us an email at hello@silentdiscoking.com.