I have been chuffed with my hi-fi for some time now...finally got all the bits and bobs I wanted for it.....and was happily just acquiring new music and enjoying the rest of my existing collection...when a friend who recently got a new set up had a 2nd visit from his dealer.... All the dealer did was re-position the speakers...yup fine, I get that sound stage opens up as speakers settle....fine....but he also took out an allen key set and tightened all the nuts on the drive units (in this case 4 in total) and a slight tighten to the tweeter enclosure)....so my mate calls me up to say it's made a massive difference.... So I tried it on mine....tightened them all up, and I have to agree....the bass lines are significantly more taunt and over all sound is quite a bit better....mine were fairly loose...I was amazed....and I'm surprised they don't tell you this in the instructions....