Yes you would disconnect the factory sub.
Here's a link a to a very easy install with self amplified sub.
https://www.crutchfield.com/S-TU4Or...arX00HB_m-9yGClKjv9A_9mNIzjg0XS4aAjN1EALw_wcB
I do not work for Hertz nor Audison no longer but have been in audio for over 30 years.
My new brand is launching soon and we have a few demo vehicles already .
Next Sema will have a booth displaying all our new products .
www.modusglobal.com
We will have a full line of car and marine , adding more SKUs ... web site just went live but more to see on instagram/facebook