is that some chinese knock off? xD
"power supoly" hehe
well thatse connectors are called differently in some countries (din, eiaj, eic, whatever)
anyway u should measure inner and outer diameter (outer seems same as 3.5mm jack next to it) but inner diameter ull have to measure, as there are few types
Your sound bar should have come with a power supply that plugs in to the DC port. The other ports are audio inputs. If you lost the power supply/cord that came with your sound bar, list the model and we might be able to find a replacement if the manufacture doesn't offer one.
The name is COAX POWER connector, UNFORTUNATELY there are a dozen sizes, ask WIKI and holly crap. If u have a broken plug, can measure it with a caliper, ID (Inner Diameter) and OD (Outer Diameter), otherwise follow Azaran's suggestion.