Im kinda new to car audio. i have a power acoustik amp thats 1800watts and i do believe around 350 per channel rms. right now im running it through 2 12" infiniteys in a sealed box and im not overly impressed its got good sq but i want some more bass. what subs or sub would you recommend getting to get loud bass so i can be heard from a little bit away and should i get a different box if thats what im lookin for?

 

Before counting those subs out, I would go with a ported box first.