We are always expecting to a modern life. Music is a part of modernist. We can't make that modern without music. So, we need a subwoofer for listening song.
Learn more:

Best Shallow Mount 12 Subwoofers – Guide & Reviews i...

shallow_subs
kicker_10c124
Rockford_fosgate_10_inch_sub
Rockford_fosgate_r2_10

Best 8 Inch Sub – Guide & Reviews in 2020