To Calibrate Your System Picture of a Digital Video Essentials test DVD (5.1 EX/6.1 version). Visit Video Essentials To calibrate your system is very important, not to calibrate is the same as buying a system to 1/10 of what you have spent When calibrated right, your system makes a wisper a wisper and an explotion an explotion. You need a sound level meter, for example Radio Shaek Sound Level Meter. And to calibrate right from the source you need a test disc, for example Digitla Video Essentials. (Test "discs" exists on LaserDisc, DVD and D-VHS High Definition) With such discs you will be given the information on how to do it. These discs also includes test signals for calibration of picture quality, a blue filter is a must (on picture above to right). The Reference level is 0dB on your pre-amp. With 0dB as reference level you adjust each speaker to 75dB using a test disc and a dB metre. Picture of a Radio Shaek sound level meter. Visit Radio Shack Other ways Most of THX sertified DVD's have THX Optimode, which let you calibrate each movie individually. Some receivers like Denon AVR-3805 have auto calibration with a microphone placed in listening position. Some, like the AVR-3805, also have auto room EQ correction calibration. More Calibration, Radio Shack, Range Level, Click Here Back To Technical Main E-mail us with your favourite products etc and we will add it to our site/archive..