Memphis 15-SRX42 SRX42 4" 40 Watts 2-Way Car Audio Stereo Coaxial Speakers Memphis 15-SRX42 4" 40 Watts RMS Streen Reference Coaxial Car Audio Stereo Speakers Peak: 80 watts pair / 40 watts each RMS: 40 watts pair / 20 watts each Sensitivity: 88dB Mounting Depth:2"