10$ is 10$ saved and if your a moron than yea u would mess Up the wiring. All the negatives have a black line on them. Not rocket science. You can see that as u wire in the head unit... If you plan on amping them than any aftermarket speaker will sound fine. I've done many speaker installs over the years. And infitiniti is not even close to the best speaker. The amp and head unit mean much more than your speakers for most set ups. Unless your doing a crazy all out build.... If so Than I would remove carpet and door skins and dynomat everything. This is my work truck I just couldn't deal w the crap that it came with. For the money I spent and some time it was well worth it now I have USB and aux inputs and a much cleaner sounding radio.
Since I seem to have pissed you off, I'll go ahead and point a few things. For one, factory wiring does NOT follow the aftermarket color code of all negatives having a black stripe. Almost all wires, positive or negative, have a stripe, and it can be whatever color the factory felt like using. Secondly, I never said anything about infinity being the best stuff out there, I said that it was what I had. And yes, the Kappa and Perfect line are really nice. Third, you can't just amp anything. You amp a set of junk pep boys speakers and not only are you going to probably blow them up, but a junk speaker is still a junk speaker, and will still sound like a junk speaker. Speakers are the most important part of an audio setup, followed by the amp, and then the stereo. I personally don't care how many installs you've done in the past. I did it professionally as my career, and the fact that you think that factory wiring is color coded to the aftermarket specs says something. If you can't afford the 10 dollars to keep from hacking up your car, you need to be focusing your money elsewhere.
