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Message: <blockquote data-quote="98stang6" data-source="post: 85697" data-attributes="member: 9104">Hey guys whats up? Can someone please explain to me, the difference between a 2ohm subwoofer and a 4ohm subwoofer? im looking into a JL audio 12" W3 sub and the 2ohm and 4ohm versions cost exactly the same.I already have an 12" Alpine Type R sub (4ohm i believe (it has 2 sets of positive and negitives on the sub itself) and im powering it with an ALpine MRP-M650 mono amp. (600 watts RMS at 2 ohms / 400 watts RMS at 4 ohms ... i think)The thing is i want to mount the sub facing upward where the spare tire goes.. but the type R is way too tall. JL's are a great deal smaller if i remember right. so i want to switch.my question(s) is what would be the better sub (2ohm or 4ohm) using my amp??thanks alot for any help guys. ill try and get some pics tommorow cuz im probably going to put the type R and ported box up for sale.</blockquote>