What is up guys. I just installed my hifonics 2006d and btl. it is decenly loud, but when i mess with the settings, it gets louder. i set my gain at 44.7v, at volume 20, if i turn it up to like 30..its loud as ****. what do I want to set all my amp settings to? also everytime i turn on my car, my sub makes a pop sound.