Yes, the use of subwoofers makes a great difference in the sound quality. The speaker alone cannot produce the best audio quality, because they are unable to produce the low end bass which is necessary for the best sound quality. So, it is sure, the inclusion of sub woofers along with the speakers results in great audio experiences to the listeners. Before the purchase it is better to make sure the sound bars are coming with sub woofers. You can visit the website https://soundwiz.net for more details about sound bars.