So I’m 18 and my brother gave me 2 alpine 10” sun type r he got them a long long long time ago so they are the older model or whatever. I got a skar 1500 watt amp and a 4 gauge 1500 wiring kit. I hooked it up and it worked really good and was super loud at first. But no I hear like a lil popping sound or crackle when a certain beat hits or something. I looked at the back of the amp and everything was maxed out. Gain, bass eq, sub sonic,and lpf are all maxed out. I was thinking that was probably the problem but kind of confused on why it didn’t make that noise at first unless I blown something or broke something. So if you have any recommendations let me know l.