There are no stupid q's... Most of us point the sub toward the boat occupants, since subs are very often in the front of the boat this means they point backwards. Fans are just another means to cool amplifiers required to keep the electronics within thier operating temperature range. A crossover seperate the high frequencies from the low frequencies so you can send them to thier respective speakers. Crossovers are also called filters, chokes, coils, caps.
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