four channel amp one sub two speakers.

Alpine MRV F450 70x4@4ohms 100x4@2ohms. 2x Jensen 6.5" 40RMS 4ohms 125 peak. Sony xplod 300RMS 10" 4ohm SVC Sub. DUAL XHD 7714 Head unit. What is the best way to wire this all up? Should I do speaker level inputs or use RCA cables? I want to take channels 3+4 on the amp and wire them to work with the sub. I don't know if that's possible. Maybe it can only be done with one channel. The first two channels I want going to the 6.5" speakers. I know the sub won't hit hard at all with 70RMS. I just want to add a little bass to the music. Thanks guys.

You can bridge the sub on channels 3/4. The amp will provide 200 watts to the sub. I would use RCA cables.

sounds perfect thanks!