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Dec 27, 2016

Hdmi and 300

I recently bought the soundtouch 300 sound bar and had it set through optical.
Today I set it through arc on hdmi . But still puzzled how this works
I only have 2 hdmi on tv a Panasonic 50inch.
So one is used for arc connection and I plugged 1 device in to the bar it's self
Not sure what this achieves
I do need more hdmi and been looking for a hdmi expansion box
Can I put this box in to the back of soundbar and then connect all my devices through it