I bought a sound meter yesterday and ran the test tones last night with some interesting results. I had called Harmon Kardon directly to ask advise, and their advise was this: Put in a DVD and choose Dolby 5.1. as soon as the disk plays pause the disk then crank the volume to -6db. then run the test tones. I would need to first run the test on the front left speaker, with the sound meter on C rating and slow and get it to about 75db which i did, and then i would need to do each speaker in turn. After i have done this for DD5.1 i would need to do the same for DTS. now i must admit it all sounds better, the dymamic range has not been compressed but everything sound a little more manageable (although i did leave the centre channel on about 80db), however one query i do have is that the settings on my speaker are now FL * -2db Centre * -2db FR * -3db SR * -6db SL * -6db it is roughly the same for DTS, is this right? i mean the meter says they are roughly 75db but -6db isnt that excessive?