If you’re planning to add a separate subwoofer ... stage, a 12 dB/octave Butterworth crossover, as well as high- and low-level inputs. It is rated at 300 watts at 1-ohm RMS power rating ...
6x9-INCH COAXIAL SPEAKERS: The pair of 6 x9 inch 360 Watt 4 Ohm 3 Way Car Audio Thin Profile Coaxial Speakers are a powerful pair of motor vehicle stereo speakers ...