I just bought one today, have an appointment to get my truck "IMPRINTED" later on, does anyone have the 9887 already tuned ect. does the imprint make a huge difference?

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Head Unit-Alpine CDA-9887
Subwoofer(s)-(2) DD 3512's
Amplifier-AT-2200.1D
Fronts-Focal Polyglass 165 V2
Box-pending...

I've read a couple writeups on it, but this should get you started:

http://www.diymobileaudio.com/forum/showthread.php?t=22136&highlight=imprint

Might be something in here:

http://www.diymobileaudio.com/forum/showthread.php?t=21668&highlight=imprint

These are more about the H650, but I believe it uses a version of IMPRINT:

http://www.diymobileaudio.com/forum/showthread.php?t=22008&highlight=imprint

http://www.diymobileaudio.com/forum/showthread.php?t=24520&highlight=imprint