I'm not sure what that last post was about jllphan, but okay...."B".
Well, after much searching (with very little help from this and other forums) I've been able to find out some great advice for greatly improving the OEM 5-series head units that have the DSP option. I made the adjustments and my system sounds a heck of alot better!! So much in fact, that I'm sharing the information with anyone who'd like to try it. This advice came from an old archive back in 2001 about the DSP systems, specifically for the 5 series.
To begin with, the stock DSP settings are only good at moderate volume settings and on certain cd's or stations. CD's and some Radio stations are using reverbs and echo's - DSP amplifies that. It also has the ability to FOOL the Bass response at higher volumes. It is sending 2 signals to the bass driver when that speaker is only expecting 1. Distortion is eminent in this case and worse when I added a high power amp and subwoofer.
But, programming Memory settings 1-2-3 adjusts to the ideal sound setting, giving really impressive improvements.
Set the Room to position 2
Set the Echo to position 2
Set the EQ to the following positions:
#1 - max, #2 - 1 short of max, #3 - +3, #4 - flat, #5 - +2, #6 - 1 short of max, #7 - max.
The separate Bass and Trebel on the tape deck are also set at MAX. - With this set-up virtualy everything sounds incredible even at very high volumes. But if you're adding an additional power amp and subwoofer like I have, you'll probably want to keep the Bass flat.
Memory 2 is set the same with the only change to EQ positions #1 - 2 short of max and #2 is maxed. - This allows for certain high Bass cd's - Rap/Hip-hop to be played without the bass distorting. These CD's tend to be recorded with ultra low bass in the 18-20 hz range. This will distort sound with the DSP set with any echo or room size.
Memory 3 is set the same as Mem1 except all Room and Echo is removed. This will allow for max Bass response at High Volumes.
If you are used to $1500-$5000 aftermarket systems with 100+++watts and 2-4 10-15 inch subwoofers, than yes, the OEM Head Unit and electronics will never bounce quarters off of your roof or win any parking lot contests....but then again, I'm now happy with the fact that I can put off the expensive decision of having to replace my head unit and potentially loose my computer and connected functions.