A pair of line inputs on 1/4″ balanced jack.
Independent gain controls allow external signals to be brought up to suitable modular amplitudes (+/-5V) – there is clean gain beyond this, or zener limiting to +/-5V can be activated via the rear jumper. There are green/red LEDs for signal/over indication – over lights above +/-5V so adjust gain so that red only occasionally shows.
Input Impedance: 20k ohm
Current: +ve 30mA, -ve 30mA