High fidelity is product selection and matching component efficiency and the installation quality. The stock system is very good for its’ matched components, weight and size considerations. The stock amp is matched to the speaker load and the speakers are matched to the speaker box volume in each pocket.

You can’t change 1 item and expect a noticeable difference. You will need to change amp, speakers and install the speakers in the correct volume box for enhanced bass response. If using an amp amp with more power, larger wires should be run.

Many that have an aftermarket exhaust think the stock system is inadequate since the sound system is competing with increased muffler noise.

My stock system is super loud at volume 15/16 while cruising with the ASV on medium and neural surround on.