You can already do that You just have to accept some loss of audio quality as part of the speakers are covered by the TV.

I have another question: Is the soundbar compatible with the Sony KD-55X8505C?

Hello, I can't answer whether it works with the above TV. However, it worked fine with my Samsung UE32J6370 Curved. So I think it will also work with your device... Otherwise, I am very satisfied with the product, especially considering the price/performance ratio.

It looks like the Samsung SUHD 4K Curved Smart TV 48" does not support Bluetooth. Therefore, no Bluetooth soundbar can be connected.

The HW-J450 is only available in black