please help with my setting setup for my car
 

hey guys, after i confirmed that my 4 speaker focal k2power are original I need some help

I have the following set up:

a- 4 focal k2power speakers connected to a crunch 900.4 amp

http://www.sonicelectronix.com/item_11757_Crunch-P900.4.html

b- pioneer subwoofer 1400 watts connected to a Rockford Fosgate Prime 150 Watt 2-Channel Amplifier

c- alpine 134BT car stereo

I am facing the difficulty of tuning it and where I live I feel garages have no clue how to set it up properly

Kindly please help me in tuning this set. where shall i start with what hpf on the crunch shall i set it to, and what about the gain settings and

also for the rockfort what frequency shall i put it on and what gain and what bass punch

There are also many settings in the car stereo headunit, it has HPF 60-160
LPF 60-160

I feel my week point is the crunch amplifier, I find it produces harsh mids and highs, do you think I should change it, is there a specific am that gives a warm sound with nice mids and highs

thanks for your help