Many people have said that the stock speakers (non-Kicker) are OK.
When I removed the panel and saw that the speaker wasn't paper, I thought maybe I had wasted money on the Polks I purchased.
However, as soon as I removed the speaker, I knew I had to replace it.
The speaker materials may be decent, but they only weighs 8.75 ounces!!! FYI: The speakers are 4 ohm.
And there is really no magnet to speak of....
Ah... Much better