PowerBass ASA 400.4x 800W Max, Auto Sound Series 4-Channel Amplifier Fully adjustable Bass EQ - 18dB Centered at 40Hz-800 watts is the total peak music power. 100 W x 4 is the 2-ohm RMS power. Self-Diagnostic Multi Protection Circuit with LED Status Indicator Built in 12dB electronic crossover - 40Hz-250Hz Selectable High or Low Pass Bridged Output - 4 ohms: 200 watts x 2 channels Power Output - 100 watts x 4 2-ohm continuous power - 50 watts x 4 4-ohm continuous power - 200 watts x 2 4-ohm continuous power Fully adjustable Bass EQ - 18dB Centered at 40Hz Power Output - 100 watts x 4 2-ohm continuous power - 50 watts x 4 4-ohm continuous power - 200 watts x 2 4-ohm continuous power Built in 12dB electronic crossover - 40Hz-250Hz Selectable High or Low Pass