Originally Posted by 3rdshiftdiscretion
turn your sub around
the length of a 35hz tone is 32ft long, your car (I hope) isn't 32 ft from you box to your headrest. so it bounces off windshield and goes back 180 out of phase canceling out with the waves coming forward. Making it quieter, this is also why you roll down the windows it gets louder, windows down lets wave mature out side of car and not double back as much so less cancellation.
the only way to get sound from a speaker is to divide the front and rear waves (or make one side reverse through a port or you can totally block it off like in a sealed box) other wise the front and rear being opposite cancel each other out, and your sound goes away.
most people think the sound from the front and rear of cone is the same, it's the same signal but rear is backwards.
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