Balanced Audio REX II Power - Manual (Page 5)

Installing Tubes
1. Install 6SN7 tubes in positions V1 through V6
2. Install 6H30 SuperTubes in positions V7, V8, V15 and V16
3. Install 6C33 tubes in positions V9 through V12
4. Install 6V6GT tubes in positions V13 and V14
NOTE: Care must be exercised when installing the 6C33 output tubes. While
inserting the tubes, please use gentle circular motion in order to facilitate proper
socket pin engagement. Do not use force, as doing this might damage the
socket pins and/or tubes.