Had a friend of mine sit in it, who had 2x 15", and he was crying because it was too loud lol. His has more punch to it, but my single 12" is definitely much louder to the ear, especially for it being such a small cabin in my truck.
It moves quite a bit of air with the windows down. Nothing like some of the other hair tricks on here, but it does move my hair around a bit. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
Overall, I am extremely happy.