Hi, I've got the above Soundbar with the wireless subwoofer Model No. PS-WJ7500R. The Subwoofer stopped working and I tried a local company to repair it but they couldn't as it was a sealed unit. I contacted Samsung shop to try and get a replacement subwoofer but they can't supply one. I've searched for a replacement one but just can't find one. Ideally I'd want a direct replacement, but if I can't get one does anyone know if there is another compatable subwoofer that would work with my soundbar. Thanks in advance.