Take off the fret and inspect the speakers. Quite sure that they need a refoam job which is quite easy.

Thank you for your help. Yes I did notice that one of the speakers drivers had a split in the foam, but would that cause both speakers to sound muffled?

The cables between the Beocenter and Beolab are new, but I’ll check the sockets for the 8 pin din cables. I did connect my Penta speakers to the Beocenter, and they sounded ok

Whoever did that refoaming job should have left it to somebody else. Besides the excess of glue, it even looks like the speaker cone is not touching the rubber surrounds. If the other speaker looks anywhere near this, I can totally understand that you would not get the expected sound results.

I agree. Martin

Yes it wasn’t done by a professional unfortunately. I will order new drivers off eBay. My only concern is the part numbers don’t exactly match. The one’s on eBay are 8480232, and mine is 8480239

Why don't you just order new foam surrounds and do the job properly? It really isn't complicated to do. Cut of the old misalligned surrounds and rinse of the glue with isopropyl alcohol. Order new foam surrounds from a certain store in Holland and do the job properly.

Can you recommend a good quality foam kit? I live in Australia

Epic, I suggest that you try to remove the old surrounds and glue before ordering replacement surrounds. You may end up fatally damaging the driver cones, depending on the glue used and your skill at removing the olds parts. This also opens up the possibility of ordering surrounds that will conceal any flaws left from the previous work. I would also be very careful with using any solvents. They can have unintended consequences. When they work, they can work very well. When they don't, it can be a real mess. Small test areas are the prudent way to proceed. Glitch