Hey everyone. Proud to say I'm new to the forum as I am a 3 week Cadenza owner. I don't need to add how I feel about this car because it seems we all think the same. I would like to add a bit more bottom end to my ride. I was a car stereo geek back in the day, but only looking to add some bottom end to the Infiniti system. Have any of you added on to your stereo, or know schematics for such a feat? Being as high-tech as this ride is, I also don't want to risk any damage/warranties. I'm from KC area, and unfortunately every review of a car stereo install place is not good, so thinking of a DIY project, unless anyone here can recommend a trustworthy place in the KC area. Thanks for your time!