I had B&W 685 for week at home. I reckon they sound excellent with most of the music I listen. The thing I noticed though is that when playing certain cds (for example Fun Lovin' Criminals) the bass lingers a bit and gives sort of brief humming effect, I am not sure how to put it. I thought its down to the room size (3.5x6m) and speaker characterisics. I tried the foam blockers supplied with the speakers, which did not have much effect. My solution so far is to lower bass output on the amplifier (pm6002). I also considered swapping 685 for 686. WIll they give less bass? Or maybe the cds that sound bassy will be alike on any equipment? Please, help needed urgently as I must decide whether which speaker to take. Thanks.