Speaker Volume


Ensure all speakers in your system present audio for the correct channels. THX-certified DVD movies will contain this test, as do calibration DVDs like Avia. Your speakers give a pink noise tone one at a time corresponding with the highlighted speaker in a graphic representation of all the channels in your audio system.

When the graphic for the front left speaker is highlighted you should hear the tone from your front left speaker. The graphic representing the center channel should be highlighted next as your center speaker gives the pink noise and on through all the speakers in your system including your subwoofer. The correct speaker should not only be identified by the graphic (IE identify the correct channel) but all speakers should present the tone at the same volume.
If you find any speaker is sounding off out of sync with the graphic either a speaker or component is wired incorrectly. Also listen for the pitch of the noise, if one channel is noticeably lower than the rest it could be out of phase so you'll need to re-check your speaker wires polarity.

Your system should be able to put out an even 75db of volume from each speaker to the SPL meter, according to the standards for THX home theater optimization.