SOUNDBAR : Should a little black cover on the optical audio input be removed?

A little black cover on the optical audio output is a dust cover. It needs to be removed before connection. 

Before removal:

After removal:

When your device is not connected via Optical Cable you should cover the Input by a dust cover again. 

Our devices supplied with an Optical Input:

ASPECT Dual Orientations Soundbar

BASE All In One Sound System

GDSBT50SS 50W Split Soundbar 

GDSB04BT60 60W 2.1 Soundbar

GDSBT100OP 100w 2.1 Soundbar

GDSBT150OP 150w 2.1 Soundbar with subwoofer