lost bass

So, I was rocking a pretty cheap kenwood head unit before and everything worked well and had somewhat good bass. Then I bought a Sony MEX-GS820BT head unit and installed it by just unclipping the old one and its harness and putting the new harness + HU in (and the rca cables that run to my...

Greetings all! My stock Honda door speakers were replaced with four Alpine SPS-610's. I used to keep the bass at +3 (out of 6) and got plenty of low-end from the stock speakers (same size). Now, even with the bass cranked to the max (+6) I get almost no bass response, and the sound is very...