I have a 2015 Prius with jbl speakers and installed an after market stereo mostly because I wanted airplay capabilities. In that sense it been very cool; what I expected. The sound definitely changed. I’m not an audiophile but I’d say it sounds crisper, and I have many more options in the eq. Problem is the bass doesn’t sound quite right. Seems somewhat hollow, doesn’t quite get there. I’m pretty sure it’s a little worse in this respect than before. So what can I do, if anything, I make it sound better? Anything with the built in amp? New speakers? Did I perhaps miss something?