
Originally Posted by
pespiritu
My friend has Alpine amplifier and subwoofer. They're also very good but quite expensive. You can buy a twin subwoofer (2 speakers) with port (air outlet) for deeper bass. For the amplifier, get a double LINE OUT (one for subwoofer and one for car speakers).
The wattage for the amplifier should be lower than the wattage of the woofer, otherwise you might damage the subwoofer.