"Wire straight to the amp" was one of the things I was hoping to do. Not all of us had a car audio class, and for most of us, cars did not even have amps (head units did, and you never saw them) when we became car people. That's why I was looking for a 'tab into slot' explanation, and all of the posts seem to fall one step short on the instructions.

I have come up with two possibilities. These assume either 1) directly wiring the 55 peak watt amp from the head unit to the speakers using the HU amp for the rears and bypassing the amp, or 2) using the RCA pre-amp connects through the amp. For the following assume that the speaker wires from the HU amp include a violet and a green positive and the same colors with a black stripe in negative. For wiring through the amp, the RCAs split out to the same colors. Here's what I've pieced together, but in the interest of check twice and fix once, I don't want to try either until someone confirms that I am not insane. Moreover, I cannot fathom many car things worse than hacking into a fifty wire harness and cutting wires that only God knows their purpose.

Finally, the information used is largely from the Crossfire factory manual, relevant portion attached.

First Option:

Using the RCAs plugged into the HU having split them to a green+ and gr/bk -, and a violet (v) + and v/bk -,
1. Cut yellow wire @ amp pin 10A;
2. Splice in v from HU to cut yl on amp side;
3. Cut y/v wire @ pin 9A;
4. Splice in v/bk from HU to amp side of y/v wire;
5. Cutcut b blue (bl) at pin 8A;
6. Splice in gr from HU at pin 8A amp side;
7. Cut Bl/br wire at pin 3A;
8. Splice in gr/bk wire at pin 3A on amp side; and
9. Cap off now exposed wires.

Second Option:
1. Cut pink wire from pin 6B;
2. Splice in gr from HU to pk at speaker side;
3. Cut dgr wire from pin 16B;
4. Splice in gr/blk from HU on speaker side;
5. Cut bl/rd wire from amp pin 5B;
6. Splice in v wire from HU to bl/rd wire on speaker side;
7. Cut bk/yl wire from pin 15B;
8. Splice in v/bk wire from HU to bk/yl wire on speaker side;
9. Cap off open wires.

You will note that the attached schematics show two multi-plugs on the amp, and A and a B. The two options are to 1) tap in with the RCA connects to the rear speakers before the amp; or 2) take the amp out of the equation, and tap in before the speakers and after the amp. You will note that per the attached schematic, there are not two sets of +/- going to the speakers, and it seems that the split for the two voice coils occurs somewhere up channel.

Will either, both or neither of these work? Do I sever the rear speaker supply voltage (pin 12B and 14B) if I do option 2, and if so, what of the speaker ground at pins 12B and 4B?

Thanks for any help.

Bob.