Audio Systems: speaker / amp configuration, chevy mailbu, watts rms

Question
I have a 2004 chevy mailbu. No rca out. I do not know the head unit ratings.

doors have 6" 2 ways.
rear deck has 6x9 2 ways.
trunk has 10" woofers.

i have no clue what any of the following information means but want to give you as much data as i possibly can.

i have 2 amps:

One is a 600 watt with the following ratings. 4/3/2 channel. there is a switch denoting the number of channels.

Power Output...60 watts RMS X 4 channels into 4 ohms.


Additional Power Output...90 watts RMS X 4
channels into 2 ohms.

180 watts RMS x 2 channels (bridged stereo)into 4 ohms.

Dynamic power.....540 wattsX2 (bridged stereo) into 4 ohms.

this amp has pass through rca outputs.

the other amp is 400 watts with the following ratings. 4/3/2 channel with no switch denoting ratings.

60 watts X 4 into 4 ohms.
90 watts X 4 into 2 ohms.

selectable bass bost 0db/6db/12db @ 50hz.

independant front/rear adjustable -12db/oct high low pass crossover, 50hz-300hz.

this amp has rca inputs only.

i need help with the configuration. i do not understand the ratings and need help with what speakers hook up to what amps and what settings i should be using for the level, base as well as all the pass, x over and other features.

I have been assured that the gear i have collected is more than adequate for a clean loud sound with pleanty of thumping base but i just can not come up with a winning combo. i feel pretty lame and hope you can help.  

Answer
You must have rca OUTs on the headend unit; if not acquire another head end.  Use www.cruthfield.com to find units that will fit your dash mounting.

Head end unit OUTs connect to the INs on the two amps.

Use one amp to drive each of the 4 door mounted speakers.  Use the other amp to drive the subwoofer (If just one sub speaker, switch the amp to bridge/mono if two 10s are being used, connect one to each channel).

Set the crossover around 100 hz.

But do not connect any speakers in parallel.

The 10s must be properly enclosed or baffled in order to get the maximum bass performance.  You can check with some of the www sites on the best way to do it.  Just google for subwoofer loading in auto applications, for example.

This should get you started.

Cleggsan