one other thing to think about also is the higher ohms the more clarity you will have... not as much boom but it will be a little more chrisp... what amp are you running ??? dual 1 you can bump up and run in either 2ohm or drop it down and run in .5 ohm... 2ohm you can run in 4ohm a little more clarity or you can drop it down ta 1ohm... so just depens on what your looking for... not sure how great you are but always remember you can bump the ohms up or down... it will always be half of the 2 added together... exm dual 4 will either be 8ohm or droped down to 2ohm... what are you looking to run ???