QED IX20 2-Way Input Expander - Q. How do I connect to this expander?
Answer:
The IX20 was discontinued a number of years ago, and unfortunately we no longer hold the instructions for it within our archives.
Here is the user manual for the MA20 (which was an identical, but older switch box); it is a “2 way input expander”, adding just one extra input (AUX) alongside the original input, hence "2-way". You plug the extra input into AUX and the original one (in this case TUNER) into Bypass – then, when you press the switch, you either switch in the AUX or bypass it (so that you listen to the TUNER).
The “no connection” is because this shared an enclosure with the TS20 tape expander which needed the extra sockets.