It’s super easy

Awesome! And thank you for the comment.

This doesn't work with fender. Plus my guess is that's a bad speaker.

We haven't had a chance to film one but Kicker has a couple on their site.

We only charge $20 extra for all the wiring when you buy the amp from us. And we also sell the harnesses separately if you already have the amplifier.

I just installed this and volume is way better, quality is good but my 23 atlas had just the non fender speakers

Yes it does both. The amplifier increases the volume and the bass. The Auto EQ improves the sound quality.

To answer you question yes, the amp has a DSP (digital sound processor) so it cleans up the signal before it reaches your speakers so it will not allow your factory radio to lower and raise different notes to “save” the speakers.

I've heard about that issue before but I have never heard it in a car. I have to test it on the next car I do. But it does wake up the bass. I'm not sure what it does at higher volumes but I don't recall it doing it.

We do not quote prices on here but here is a link to the products. shop.enfigcarstereo.com/volkswagen-atlas-audio-upgrades/