I download a copy of
"IASCA OFFICIAL SOUND QUALITY CD" and I enjoyed it a lot, it's awesome to go through each section, I really like the
Front Stage part with 3 people talking one on each side and a woman in the center; also a track with
7 drums spread out starting on the left equally spaced. Also a couple of songs that put my 6.5 drivers in a
work out. There is a lot more that I don't understand, but I'm all for learning about
Sound Quality.
Very interesting!
NOTE: 
I'm only running a pair of 6.5" speakers in the front doors from 53Hz all the way up to 12kHz, (now I understand why I really want my midbass in kickpanels, the doors are bad speaker boxes) the Bachuka from 20Hz to 40Hz. My stage is very low as is but still
very interesting.
Can't wait to have
all speakers and amps working together.
D.