Fully Featured Bookshelf Speakers. Most 2.1 systems include tiny satellite speakers and make up for the small sound from satellites with their subwoofer. With the S350DB you get both a massive subwoofer and fully featured bookshelf speakers. Connect your sources via Bluetooth, RCA, optical, coaxial or AUX with these. Side Panel Controls Take full control of your audio with the side panel controls on the side of one of the bookshelf speakers. Three knobs are located on the side that effect the bass, treble and volume for the entire 2.1 system. Once switched on, the power light will appear on so you know your system is working. 8-Inch Subwoofer for Deep Lows Receive deep satisfaction from the rumbling lows from the S350DB when the 8-inch subwoofer is activated during playback. Movies, music, and games come to life when you have this subwoofer attached and producing sound. Side Panel Bass Reflex Port This subwoofer has an enhanced side panel bass reflex port. This reflex port enhances your listening experience for all types of bass sounds. Enjoy deep rumbling lows from your favourite movies, music, games and so much more with this 2.1 system. Titanium Dome Tweeters The S350DB is equipped with two bookshelf satellite speakers that have titanium dome tweeters that aid in producing a sound that provides clear highs in any genre of music or videos and movies. The titanium dome tweeters are ¾-inch in size.