I have recently gained an intrest in home theater and recently bought my first system, a Kenwood HTB-504 in a box system. My receiver has a feature to adjust the volume of each speaker individualy so everything is balanced. It said in the manual to just do it be ear and get them as balanced as possible. However, I don't think I have a trained enough ear to get the volumes accurate enough. Anyone know where I can get a decently accurate and most importantly affordable sound pressure level meter? Also, when it comes to system tuning I assume you want your five speakers at all the same level, but how much louder should I set the sub than everything else?