i dont know all that much about car audio so i will ask the opinion of this section of the forum for some advice. i want to get a smallish 4 channel amp to power some infinity reference speakers. i dont need any more than 50 watts per channel and i need it to be as small as possible so i can put the amp under the front seat. i was thinking of getting the alpine mrp 240. i also want to get an amp with pre-outs so i can hookup a sub to the amp since my HU doesnt have a sub out. any suggestions?