DC power supply for use with TC-X². 9v negative tip polarity, 2.1mm jack. EU 2-pin plug.
Note: If your synth requires a gate voltage of more than 9v I recommend a Multi-Voltage Power Supply (wall wart).
Some vintage synths need 12v or more to trigger their envelopes, early Roland gear, some ARP, Sequential Circuits etc. Check your owners manual for specific requirements.