A:AnswerThe LG - 120W Wireless Surround Sound Speaker Kit, Model # SPJ4-S is compatible with the LG SJ4Y and SJ5Y Sound Bar Models. It will not work with the LG SH3K Soundbar...^IFV
A:AnswerThank you for reaching out. For best assistance with your inquiry, we recommend reaching out to Best Buy directly. Their phone number is 1-888-BEST BUY (1-888-237-8289). ^CP
A:AnswerAll the speakers except for the Subwoofer for the LG - 2.1-Channel Soundbar System with Wireless Subwoofer and Digital Amplifier - Black, Model # SH3K and enclosed within the SoundBar and you cannot add additional speakers to it. ^CP