The two popular issues with the Infinity Non-Nav sound system are

1. Too much bass from the door speakers (fix posted as a sticky)
2. No way to plug in auxiliary devices (e.g. iPod, XM receiver, hair dryer) into the non-navigation head unit.

Since you don't have the head unit, you could do yourself a favor and buy a head unit that fits the hole, a power amp if you decide you need one, and wire it to the factory speakers, adding tweeters and subs if you don't have them. If you pick the right head unit you will end up with a place to plug in your auxiliary devices and skip past that whole twisted mess.

As for the doors speakers with too much bass, most upper-end head units will give you several options for low-pass filter settings and you can set it to achieve the same effect as adding the capacitor described in the sticky post in the forum.

Really, while the factory head unit LOOKS GREAT, it's limited in what you can do with it in this age of blue tooth hands-free or MP3, iPod, XM or Sirius Sat Radio. Unless you're firmly rooted in the 90's and can live with a stack of CD's and AM/FM radio, you will come out ahead $-wise by skipping the factory non-Nav radio.

And from what has been posted here, the NAV radio isn't such a great device either compared to options in the aftermarket.

You can see what I did on my site - though I went through the factory amp in my car, you could just as easily do most of the same things (using your favorite brands of components) and come out ahead.


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