I recently purchased an Integra DTR 6.3 receiver, 2 BW CDM 9NT, running them with Transparent cables. I am very happy with them so far. One question I have is that when I dramatically increase the sound level from low to an appreciably higher one quickly I can hear an ever so slight crackling or scratchy sound through the speakers only during the increase (it only happens about 25% of the time). The slight scratching stops when the increase of sound stops. What can this be attributed to? I have about 15 listening hours on the equipment. Could it be that everything is not broken in yet? Or is this normal for this equipment I have? One has to really listen to hear it...and I have only noticed it while listening to 2 channel audio.