2) Polk Audio DB651 6.5" Car 2-Way Speakers + 2) Boss CH6930 6x9" Speakers Pair 180 Watt MAX (Per Pair) 60 Watt RMS (Per Pair) Type: Dynamic Balance Woofer with Polymer/Mica Composite Cone with Rubber Surround Efficiency: 92 dB Nominal Impedance: 4 ohms