Optional Pro-Ject Switch Box. The Trigger Switch socket connects the input expander Pro-Ject Switch Box. The Switch Box provides four extra line-level inputs. A 30cm remote switching cable is supplied with the Pro-Ject Switch Box for connecting the Trigger Switch socket of the Pro-Ject Stereo Box.
CH- or CH+. If Input 1 is selected, the LED over the Input Select button lights up green. If Input 2 is selected, it lights up red. If the optional input expander Pro-Ject Switch Box is connected, Input Select will also select the additional inputs provided by the Switch Box.