what does it mean if my speaker is a 12" Dual 4 ohm Type-R Subwoofer?

Eric

New member
Im thinking about buying 2, 12 inch alpine type r's but before i buy them i would like to know what "dual 4 ohm means". i would also like to know what the difference is between "dual 4 ohm and "dual 2 ohm." is there any special kind of amp i would need to buy to power them or anything like that... thanks for any help!
 
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