Monoprice 110917 6 x 9 Inches 90W 3-Way Car Speaker (Pair) They have a nominal impedance of 4-ohms and are rated to hand up to 45 watts of continuous (RMS) power and 90 watts peak They feature a frequency response of 50Hz ~ 20khz with an 86db sensitivity Each order includes two (2) three-way speakers plus speaker wire and mounting hardware