2) Boss CH6520 6.5" 250W + 2) 6x9" 350W 2-Way Car Speakers + 400W 4-Ch Amplifier MAX Power Handling: 125 Watts per speaker (250 watts per pair) Size: 6.5" Impedance: 4 ohms Each 100Hz-18khz Frequency Response Sensitivity: 90 dB @ 1 Watt/1 Meter