Thanks for the reply.
Sorry, haven't actually taken the speaker system out of the box, just had a read of the instruction manual.
Won't be able to set it up for a few days at least since I'm stuck in bed with a bad back.
If it's any help the speaker system is the
Alba AS122.
According to Amazon it has 2 x RCA input for connecting two audio sources, sorry but having never even thought about getting a surround sound system before, I have zero idea what RCA means.