I just set up my Kenwood HTB-504 tonight. I tried to set the speaker levels by ear, but it's near impossible. I plan on getting a sound level meter from Radio Shack or Ebay. Can someone please explain the procedure to set the levels using the meter. Just for reference, the VR-507 volume goes from -99 to -7 dB and the speaker levels go from -10 to +10 dB. Please explain the procedure in idiot terms. I'm new to this stuff.