4 channel mixer number of channels 4 dimensions 202 x 202 x 35 cm number of stereo channels 4 effects 8 digital effects equalization 2 band eq features usb mp3 playbackrecord connections usb sd card phono input 1 line in 2 inputs 2x lr line rca 1x lr phono rca 1x mic jack outputs 635mm headphone jack 1x master lr rca