Although you can add another speaker to your soundbar, there is no need to do so because, with an LG soundbar only, you can enjoy high-quality audio. The LG soundbar has several features which make listening to music and watching movies more enjoyable. You won't have trouble hearing every word clearly without struggling to hear over background noise like other devices on the market. So it would be pointless to add a second speaker to your soundbar because then you're sacrificing surround sound for the sake of convenience.