the cars a 2008 dodge avenger sxt, i had some stuff installed from a family member

http://gyazo.com/6f8364eca6c296adc6d5e062d2d8bb89

I dont know the links to what i got but thats a pic of whats in my car,

Also im not sure if it matters but heres my head unit.

http://www.sonicelectronix.com/item_43938_Kenwood-DDX319.html?creative=23357977448&device=c&network=g&matchtype=e&gclid=CPqX0rnmsrYCFZFaMgodhS8Afg

Just want to know how to fine tune it, what id need to do and such.

Friend said to get a nob to control the bass, replace stock speakers, not sure what kind, i believe my car has 4 speakers stock, 2 up front, 1 in each door, and 2 in the back, very back of the car right below the back windows.

This post was edited by jspnoobie5 on Apr 4 2013 11:39pm

setting aside the fact you need to simply stop listening to your family member on the subject because he's clearly lacking any sort of actual knowledge in car audio.

as far as sound quality goes all around you'll want to replace the stock speakers for sure.

your cars speakers are: four 6x9s and two 2.5 inch tweeters. for the sake of simplicity just unhook the stock tweeters because they're unnecessary to have and replacing them at this point would be a waste of time and money.

as for the other ones i'd suggest not gettings 6x9s and instead using 6.5s with an adapter plate. round speakers have inherently better sound quality than oval ones.

onto tuning that amp....

the knob labeled lp freq: set it to around where you would assume the 80hz mark is. considering it starts at 40hz and ends at 400hz it should be just a little bit of a twist to get it about right.

the switch labeled config should be switched to "var lp"

the knob labeled sens should be set to where you would assume 4 volts is at. pics are kind of fuzzy on this but it might top out at 4 volts which makes this setting easier.