The D3x is said by Creative Labs to maintain a Bluetooth connection for up to 32 feet (approximately) or 10 meters. I tested it by taking the iPad I linked to it about 25 feet away into a separate room with the door closed, and there was no interruption, audible deterioration, or loss of connection. The D3x can be played at a fairly loud volume, though I find that the sound becomes overly trebly and somewhat distorted past a certain volume level. So I would say that the D3x on its own (without an added sub-woofer) is not a stereo system for those who want to blast music, feel the explosions on movie soundtracks, or host dance parties.