The answer:
Hi Douglas,
You cannot run the XLR OUT and RCA OUT simultaneously. The 'output mode' is chosen on the front panel. 'Balanced' for XLR, 'Unbalanced' for RCA. In either mode, LINE 1 and LINE 2 outputs operate simultaneously. This means you have to use RCA for both your speaker and sub, or XLR for both your speakers and sub.
Thank you.
Support Team | RHYTHM DISTRIBUTION