A:Answer You can add additional Music Flow speakers to the LG 5.1.2 ch High-Resolution Audio Sound Bar with Dolby Atmos, Model # SJ9 as described on pages 20 - 38 in your owner's manual. The Music Flow speakers, H3 - (Model # NP8340), H5 - (Model #NP8540), H7 - (Model # NP8740), P5 - (Model # NP5558MC/ Model # NP5550B/W/BR/WO/WL/), P7 - (Model # NP7550W/B). ^CP