New Speakers are distorting
 

I bought new speakers for my sister and installed them for her. I've already checked the wires to make sure they are hooked up correctly. Messed with the EQ and that did nothing. Any ideas?
With nav, w/o nakamushi. new speakers are Kenwood KFC-1666S's

You should probably check the wires with a voltmeter to see if it's getting any electrical current.

Maybe also check the fuse?

Based on some recommendations here at clublexus, I installed Infinity 6032si and 6032cf speakers in the front and rear doors respectively. They are 2-ohm speakers, and yours are 4 ohm, so maybe that has an effect. Also, make sure you correctly connected the positive and negative wires from the car to the speakers.

Also, are you sure the rear of the speakers are not touching the door?

Speakers
 

i haven't been in car audio in a long while but they have bass blocker crossover filters that you can wire inline to block certain frequency ranges that should correct some distortion, by now they should have some that have some adjustability. Speaking to an audiophile should point out to the frequency range you want to filter, or if you find one..just trial and error to get tuned in.