I purchased a SLM Today from Maplins, Quite shocked at how far out i had my speakers [Centre way to high!]. My Centre level has gone from +7 to -5. Could anyone advise on my setting up with this meter in case i have it all wrong. I used the test tones on amp [dont know if using test tones on THX set up features on a DVD disc is better?] Anyway set my amp to Zero db [goes from -75 to +15] and then went through each speaker adjusting levels till all at 75db...But my sub is the problem trying to set this at 75db is shacking my room to bits, i use the filter on sub [Rel 150] to cut down boomyness so setting this to max wouldnt work, i have it at about half way position. So my question is....What level do you set sub at? 60DB about right!!!