Well its pretty simple man you can get the 4ohm coils and run it in 2ohm version....example at 4ohms a sub is 400watts rms so at 2ohms it would be 200rms...understand that? I would have to say though this amp if you dont have it dont get it, because its a very shitty rating 250x2@ 4ohms and it claims to be a 1000watt amp thats not a great rms power there man....I would suggest you look into the jbl bp 600.1 at ikesound.com and it will push 2 alpine type-r 12's good the jbl 600.1 is 205$ with free shipping, but it will give you more than 600watts its 300at 4 ohms and 600 at 2ohms and many people have that combo the 600.1 with 2 alpine type-r and it blows most daily drivers away...........