Eh, even then. im not a fan.
The Essentials of Sound Quality IMHO - Car Audio | DiyMobileAudio.com | Car Stereo Forum
That covers ALOT. post 12 has a very important part for staging. Pretty much. center stage with low frequencies >1000, is dependent on Arrival time of sound wave. IE: the closer speaker, you hear first. Thats why you Delay speakers with T/A so that they arrive at your ears at the same time. High frequencies give you center stage when both speakers(or mids, or tweeters or whatever is playing those frequencies) are playing all frequencies at the same loudness.
Because of different distances and how soundwave lose amplitude(loudness) as they travel, You generally have to lower the volume on your closest drivers. This where an RTA comes into play, although you can do it with pink noise and some tricks.