Firstly, did you get an AV Receiver for your home theatre? If yes, the manual should have information regarding the calibration of the HT with its built in calibration system (Audyssey, YPAO etc) to help you calibrate your HT. It should set all the necessary parameters with regards to calibration. As we are not audiophile, this should be good enough start. You may like to also check out this forum Xtremeplace where local Home Theatre enthusiast share ideals and opinions. There are also apps in the Apple Apps store if you are using Iphone, some free, which can make the iphone into a decibel meter. Not as accurate as those professional ones but it will do the job. Not too sure for Android tho. Hope this helps.