Backed by nearly 100 years of innovation and reliability, Blaupunkt delivers again with CEBP870 7-Band Digital Equalizer, compact and sleek in design while maintaining functionality. Featuring separate front and rear outs, boost your high and low frequencies with ease or optimize your vehicle for surround sound with a quick turn of the subwoofer and volume levels. Power Supply: 11-15 V DC Neg. Ground. Max: Output Voltage: 7V RMS. Pre-Graphic Frequency: 50 Hz, 125 Hz, 315 Hz, 750 Hz, 2.2 KHz, 6 KHz, 16KHz. Equalization range: + 12 dB