http://cgi.ebay.com/ebaymotors/KICKE...QQcmdZViewItem

http://cgi.ebay.com/KICKER-CVX12-CAR...QQcmdZViewItem

Which one is better, the 2ohm version or the 4ohm version?
And what would be a good amp for these?

 

neither is technically better than the other. Each one provides different options for wiring. That is the major difference. Research which one can be wired to which impedences and after choosing which one will work for you, choise an amp that can match the impedence and RMS

 

http://www.rockfordfosgate.com/rftech/woofer_wizard.asp

with 2x 2ohm dvc subs, you have to find an amp that puts out its power at .5ohm or 2ohms

with 2x 4ohm dvc subs, you have to find an amp that puts out its power at 1ohm or 4ohms