Q Acoustics 3070 Active Subwoofer (Graphite) Adding a subwoofer to your system allows you to fully enjoy those Blockbuster movie explosions, and other very deep bass sounds, right in your listening room. The 3070S subwoofer perfectly complements all Q Acoustics 3000 and 2000i series stereo and center channel speakers. And of course; because its a Q Acoustics product, its twin, long throw, 6 inch drive units and powerful 140watts rms amplifier, enable the 3070S subwoofer to beautifully reproduce the fast twang of a double bass just as well as exciting movie soundtracks. Ported Enclosure Type, 2 x 170mm Bass Unit Includes: 1 x 3070s Active Subwoofer 1 x Magnetic Speaker Grills 1 x User manual 1 x AC Power Cable 4 x Adjustable Floor Spikes 4 x Floor Spike Locking Rings 4 x Floor Spike Covers Dimensions H/D/W (Inches): 16.73 x 21.06 x 7.87 2 x 170mm bass unit