A 2-channel stereo audio mixer module that uses NJM4556A low voltage and high current operational amplifiers. It has four outputs, on which the summed signal from 2 inputs is available and to which the user can connect headphones or an amplifier. The volume level of each input and output channel is adjusted with potentiometers without affecting the level of other signals. Both inputs and outputs are connected via 3.5 mm mini jack audio connectors. The module is powered via the DC connector with the voltage from 5 to 19 V and can consume up to 70 mA.
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