XtremeMac's Tango line of speakers has returned with a new version: Tango TRX ($180) is the company's first Bluetooth audio system, capable of playing stereo audio from connected iPods, iPhones, or any Bluetooth wireless device (including the iPad). Featuring the cleanest industrial design of any Tango to date -- no easy feat given how sharp prior Tango units were in this regard -- Tango TRX has a neat volume dial on its front right side, an iPod/iPhone…
