they don't give the ohm's because it is a integrated unit, it will be 4ohm's or less, possibly 2ohm's but it's not a high power woofer, you can check it with a meter to determine for sure.Problem is the speaker is not labeled with it's specs to even try and figure out. Here is a link to the specs. I don't see any information about impedance?
https://www.rockfordfosgate.com/products/details/p300-12t/