Head Unit: Alpine all the way
Amps: RF, DAT, or soundstream
Subs: Fi, DD, or DC
Batts: Powermaster or Kinetic
Speakers: RF, JL, or RE
Sound Processor: RF
Wires: RF or JL
and stinger accessories
Most people think Wen you turn up the volume all your doing is adding more power but for every db you go up you have to double the power. for example lets say that your stereo does a 145 if you want to go to a 148 you have to double the power