I have a 700 wat mono mounted under the middle seat powered by 4ga wire for my sub and already ran 2 more sets of rca for the front and rear channel. and currently only using the built in 200 watt amp in the pioneer head unit that is driving the 4 door speakers nice for the time being.. trying to decide on a 4 channel or a class D 5 channel.. Not sure what i want to do yet.. for the pioneer amp this sounds damn good with only 50 Wat per channel.. does the job for the time very well.. and if i turn it up it is loud as heck... makes ears hurt. about 3 times louder than the factory stereo and speakers.... doing the job fine for now.. i have other hight priority purchases on the list like tires, brakes, etc etc.. and house stuff..