No problem. I've used several 6channel amps as 5 channel amps with the remaining channel unconnected to anything.
3 responses Add your response
There is nothing wrong with what you want to do. In many cases, you are better off NOT using all the channels on a multi-channel amp, especially if it uses one common power supply. This increases the amount of power available to all of the other channels being used and can result in improved sonics. Sean