Joel Sietsema from Definitive Technology/Sound United shows how easy it is to add the A90 up-firing Dolby Atmos/DTS:X speaker module to the new BP9000 line of tower speakers. Just pop off the top and plug-in the up-firing speaker module to add height channels. The wiring is all hidden inside for a clean look. Find out more about the series here: http://www.bigpicturebigsound.com/Han...