I have 2 midrange drivers 2 crossovers and 2 tweeters in my front setup.and in the rear 2 speakers.in the front the tweeters can handle 50 rms each.and the midrange can handle 100 each so 300 total in front,and in back each speaker can handle 100 each so 200 all together in back.im looking for a 4 channel amp would it be good to get a amp and each channel had 130 rms but for the back i fade it to the front cuz the back can only handle 100 so i just fade eit to the fornt and turn the gaines down would this be a good idea and good setup