I have a Sony tv 55XE9005 A-MSH (https/tweakers.net/pricewatch/742579/sony-kd-55xe9005-zwart/specificaties/) with the Sony HTCT-390 soundbar with wireless subwoofer connected to it. This is all installed under my tv and I want to make it surround sound and add 2 speakers to it. Does somebody know if this is possible?