wiring to front components- from hu or amp?

Hello all!
I have always wondered this- What are the downfalls on running my speaker wire directly from my wiring harness to the amp, and then using the factory wiring to my component crossover? Hopefully this makes sense. I guess I am trying to avoid running alot of speaker wire, but want to do it right..
Thanks!
-Adam

 

You mean like a high level input? The sound quality will be lower than it would be with a low lever(RCA's). What kind of head unit, amp, and budget do you have?

 

Need to re-word this. I could run the speaker wire for my components from the wiring harness of my head unit to the outputs on the amp, and use the factory wiring inside of the door to the input of the crossover. Still get signal.I would still use the rcas as the inputs. Its that or run the speaker wire from the outputs of my amp to the crossover in the doors, and the rcas to the input as normal.

 

Oh you want to use the stock wiring in place of running wires for the amp?

 

Geezus! Am I not being clear?! lol Someone with experience in this please answer/help? Thanks

 

IMHO it would be easier to just pull new wire to the crossover. I would much rather run from the amp to the doors than from the amp to the head unit. Space is already limited behind there anyways. The factory wiring is also pretty small, so depending on how much power your sending this could be another factor.

 

I think I get it. You plan to install the crossovers inside the doors. The stock wiring will run to the crossovers and then you will use new wire to split off to the components? Of course, you will need to run speaker wire from the amp back back to the stock wire harness and splice everything together after hacking apart the stock harness.

IMHO, this would not be worth the effort. Run all new speaker wire and give yourself the flexibility to place the crossovers wherever you like.

Where do you plan to place the amp?

 

The factory wiring is also pretty small, so depending on how much power your sending this could be another factor.

 

I've done this before, if I understand you correctly. From HU, RCAs to amp, amp speaker output via speaker wire back to HU area, amp speaker wire to wire harness speaker output, factory wires thru to the door, then to the crossover.

I ran it this way with about 60W to the components for awhile, then later pulled dedicated speaker wire from the amp to the doors/crossovers. I didn't notice any significant quality or quantity differnece wither way.

 

Just pull dedicated speaker wire from the amp to the speakers, you'll spend about the same amount of time than you would trying to do what you're thinking.

 

Gotcha. I figured that running speaker wire from the crossover to the door would be excessive, but makes sense to run a dedicated speaker wire. That is, if I mount the crossover on the door.
Thanks for the help! Exactly the advice I was looking for!
-Adam

 

What did the OP do? Any update? In past cars, I would use factory wiring. Just make sure you use the right wire lead and not from the factory crossover.

Also when in doubt about the polarity just use a battery to test it. Make a note first to see which wire goes to the speaker +/-. Then cut it off and use a battery to test directly to the speaker and you will know the correct polarity. Just google polarity test with battery.