I know I should bring my own cd and dvd to use in all tests so that variable is the same. I assume that I should use (if possible) the same speakers with each different receiver. Should I set all bass and treble adjustments to 0? Or is there a specific mode that should be common to all receivers (direct mode maybe?) that I can set so there is nothing to spice up the sound so I can get a pure sense of the sound at the heart of the receiver? I assume also that I should just use a pair of stero speakers?(i.e, no sub, no surround, etc... So what do you think? What is the best way to conduct these tests? Oh! One more question. What do you think is the best type of music to test a receivers ability?