Mini Microphone Mixers Default Title Mini Microphone Mixers Compact mono microphone mixers with 8 low impedance jack inputs, mixing to a single master jack output. Onboard separate volume controls for each microphone and the master output. Powered by 1 x 9V battery or optional 12Vdc adaptor Available in 4 or 8 channel versions Requires 9V (PP3) battery or 12Vdc power adaptor Battery 9V battery (PP3 - not supplied) Power adaptor 12Vdc, 200mA (optional) Input impedance 3.3k Ohms Output impedance 600 Ohms Output : master 1 x 6.3mm jack Dimensions 150 x 108 x 64