The Bose Lifestyle Ultra Subwoofer delivers bass you can really feel. Low notes have serious weight, so every beat, rumble and explosion lands with impact. CleanBass Port technology keeps distortion in check, so bass stays tight and clear, even at higher volumes. You get depth and punch without the muddy rattle. Because every room sounds different, CustomTune technology measures your space and adjusts the audio to suit. It means everything stays balanced and natural wherever you're sitting.Good to know- The Bose app guides you through setup and lets you tweak the settings- Adjustable EQ means you can fine tune the bass and balance to match what's playing- It's part of Bose's Lifestyle Collection, so you can easily expand your setup