System install questions. Use the same wire or change it out.

[cody0707 10+ year member]

I am hooking up a MB Quart ONX4.125 to Polk Audio MM6501 front speakers and Polk Audio MM691 rear speakers. At the same time I will be installing a Clarion CZ500. I plan on mounting the amp under the front passenger seat.

1.What is the best way to run the power, rca's, speaker wires?

2.Can I run the speaker wires back to the factory installed wires that are running to the head unit or should I run new wire do to the increase in power?

3.Should I purchase some sound insulation and put it in while I am at it? How much?

4.Does it matter where I mount the crossovers or should they be as close to the speakers as I can get them?

Thanks in advance for the help.

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[daboyfrumdabx 10+ year member]

I am hooking up a MB Quart ONX4.125 to Polk Audio MM6501 front speakers and Polk Audio MM691 rear speakers. At the same time I will be installing a Clarion CZ500. I plan on mounting the amp under the front passenger seat.
1.What is the best way to run the power, rca's, speaker wires?

2.Can I run the speaker wires back to the factory installed wires that are running to the head unit or should I run new wire do to the increase in power?

3.Should I purchase some sound insulation and put it in while I am at it? How much?

4.Does it matter where I mount the crossovers or should they be as close to the speakers as I can get them?

Thanks in advance for the help.

1. The same as it's always done. Any variances are going to be highly dependent on vehicle if you're looking for exact wire routing.

2. Use new wire

3. I'd deaden the areas around the speaker. Whole car would be ideal but not a must if you're only running that equipment. How much...I have no idea.

4.Closer to the speakers would probably be ideal. It's also nice as it's less wire to run. I'm not sure how much you'll lose if you mount them further away. That being said, I see people mount crossovers in their trunks for their front speakers so any difference will be negligible.