Alpine PXA-H800 -Imprint Audio Processor 6 Channel Inputs  Up to 10 volts, both RCA and speaker are provided. Dual Optical Inputs  Ai Net and Ai Net Aux. 8 Channel Outputs  Fully active, 4 volts. Equalization  31 bands per channel. Parametric Equalizer  10 bands on front, rear and centre channel.