Q Acoustics M4 Soundbar with Built in Subwoofer (Multi-Award Winning) Our M4 soundbar with built-in subwoofer eliminates the need for extra boxes and cables. Its slim design and built in sub overcomes the need for a separate subwoofer When wall-mounted, the distinctive flared shape allows sufficient clearance between the unit for cable entry The M4 uses BMR drive units to deliver outstanding sonic performance. This also disperses the sound across an exceptionally wide area. No matter where you sit in the room, youll be able to enjoy the full hi-fi cinematic experience The digital optical and analogue inputs from the M4 allow it to connect to a wide range of entertainment sources, including your TV, Sky or Virgin box, CD, DVD or Blu-Ray player, smartphone, tablet portable music player, computer or internet radio The M4 is Bluetooth compatible using aptX lossless Bluetooth for audio streaming. It can sync to almost any Bluetooth compatible audio device. We use atpX V4.0