Well, my Arcam system has been sat on top of each other for the last few months, I was very happy with the sound quality. I then had an oak rack built by hifiracks.co.uk and I have to say the whole sonic quality has changed in an instant. Bass is taughter and more noticeable, the soundstage has improved, even the detail has increased. I have to say I'm astounded there is such a discernable difference. I listened to That uncertain smile by The The last night, a track that's been a favourite of mine for 20 years or so, and it sounded completely different. I don't really understand, my Physics A level doesn't explain how this could be the case. Someone please explain.