Hi everyone, just a quick question, and forgive me for being stoopid!! I have just ordered an spl meter and the avia home theatre test disc, however i was just wondering, when i'm calibrating my marantz 4200 amp, do i set the main volume to 0 db and then adjust each speaker accordingly so it reads 75 db on the spl meter? I've never done anything like this before so i could do with a quick guide if anyone has the time of day to help. Thanks again for any help, hopefully i will be able to offer advice to other people soon instead of recieving it all the time!! Cheers!!