Hi and welcome to Beoworld! Effectively you have two devices connected directly to your Beolabs, which you shouldn't do - for reasons that you have discovered, but you could also cause damage! You have at least two options:

• A powerlink switch like this to enable two devices to share the speakers: 

https://shop.oneremote.dk/shop/69067-powerlink-switch/4162-powerlink-speaker-switch/

If you do not need multiroom features the powerlink switch might be the simplest of the two suggestions as it's mostly plug and play. I would just like to mentions that there are other products like that. For example the brand Almando has similar solutions which can switch between even more inputs so you can add a music streamer like Sonos Port, Airport express, Chromecast Audio or whatever you wish. 

Location: Denmark

Dear Guy and Madskip, thank you for your feedback. When you mentioned the Almando I remembered that I do have such a device installed to connect my Apple Airplay to the BeoLab speakers. Since that is a SPIF connection I realised that I should have one PowerLink input port available. And so it was. I connected the BeoSound to the Almando and it works like a charm. Again thank you both for the prompt replies Cheers Paul Login to view image

Great to hear that it was so relatively easy to solve the issue 😀 my Almando switch only have the 2 Powerlink inputs which is fine in my setup, but great that yours had an extra input