In my 94 trooper i have 2 infinity subs pioneer deck 6 infinty speakers i am planning on buying 2 amps one to run my speakers and one to run my 2 subs i dont know if i should get 2 channel 4 channel i dont know the difference with 2 ohm and 4 ohm i have been looking at jbl and mtx if there is someone out there that knows which amp i should buy let me know thanks tyson