Remove Sound Output Device
I'm not familiar with the Belkin S52, but assuming it's a sound device the first thing I would try is using the Audio MIDI Setup app to remove it.

Follow these steps:


Launch the Audio MIDI Setup (by default, this app is located in Applications > Utilities > Audio MIDI Setup)
Once open you'll see a list of devices on the left-hand side
Select the Belkin S52
Now click on the minus - button to remove it
Follow any prompts you may get


If the minus - button isn't available, or the Belkin S52 isn't listed, you may need to clarify your question to include details on what the Belkin S52 is and how you installed it originally.