So, your subwoofer has that hole in it because it's a precisely-engineered opening to a specially-tuned resonance chamber that helps your subwoofer driver punch above its weight. It's tuned to a ...

I just moved into this apartment, and sitting in my room is a Scientific Audio Engineering A105 Subwoofer Amp...According to Google, it's 50W. Also present is a monsterous 15" subwoofer in a box that ...