Start with XtremeMac’s less expensive Tango TRX, which is part of a family of Tango speakers that dates back to an aesthetically cutting-edge 2006 model that was followed up by a stripped down semi-sequel called Tango Studio and a more direct follow-up called Tango X2. All of the Tango speakers have sold for $200 or less, and stood out from the pack more for their industrial design than sound quality. Tango TRX is XtremeMac’s first wireless…