buy something like this from radio shack:
http://www.radioshack.com/product/index....rentPage=searchthe meter has a knob at the top that you turn to the appropriate DB level. If you turn the knob to 70 db it will read everything from 60 db - 80db. Most people calibrate their system to about 75 db so leaving the meter on the 70db mark will work fine.
Either sit in the primary listening position and hold the meter or place the meter there with a tripod. Make sure the meter is on "C" weighting not "A". Play test tones for each speaker through your receiver,and adjust the channel levels so that each one reads 75 db. Some people choose to bump up the sub by 5db.
What receiver do you have?
*Cue JohnK with his technical research paper links
