watch out guys...i just got my spl and now i'm going to flood you all with questions. i guess it'll be easier to post new questions each time... unfortunately, i don't have a ve or avia yet. so, after searching prior posts it seems like most people use their spl in conjunction with one of these discs. since i don't have one, how does that change what my levels need to be? since both calibration discs use either 75 or 85 db as the calibration point, in order for me to calibrate without it, do i need to go to 105...meaning put the dial at 100 instead of 90, then read +5 on the meter? hope that makes sense... tia ------------------ You step in the stream, But the water has moved on. This page is not here.