For big, bold 2.1 sound. THX Certified means quality you can count on - these speakers have met strict performance standards to achieve THX certification. You'll hear and feel immersive audio from 200 watts (RMS) of power that brings music, movies and games to life. Multiple inputs and a built-in headphone jack - make it easy to get great sound from up to three audio devices. Easy, two - satellite setup and a powerful subwoofer give you big sound - even in large spaces. Integrated controls put you in command - dial the volume and bass up or down to customise your listening experience.