First of all, I learned a lot from this experience. When changing your stock car speakers to an aftermarket one, do not expect that you'll have a deep bass sound from it right away. Instead, you will hear clarity on the new ones (Pioneer TS-G1645R). A subwoofer is needed to complete the setup. I almost requested them to put back the original speakers of my Honda Accord Sport 2015 because I thought that I made a mistake.
Derek knows his stuff and explained what was lacking. After the team installed the Subwoofer (Alpine PWE-S8), it was just what i wanted. I love my new sound system.
Derek also removed out a ANC (Active Noise Cancellation) of the system that was causing the buzzing sound when I start the engine. I spent about $750 for this project. Thanks to the 2 talented gentlemen at the back of the car shop! The install was so clean.
Note: I kept my oem car stereo to keep it looking original.