I have the 6CD Premium sound system in my 07 Fusion SE. I was wondering if anybody knew the actual specs of the system (sensitivity, RMS power, peak power)? I'm used to having aftermarket receivers and keeping my volume fairly high, but I've heard that because of the sometimes poor power output of stock decks/amps that you should not turn the volume up beyond 1/2 of the way? I find that when i turn the volume on the stereo beyond maybe 5 or 6 full lines, the bass stops increasing with the mids and highs. Is this normal? Any thoughts or opinions?