Quick note, I found with the Behringer usb card I have. Apparently you get this awful ground loop noise through the recording and somehow it is also forced through the recording channel and out the mains. I don't remember if the VLZ mixer's have a direct out or not(haven't used my VLZ Pro in a couple years because of said issues) but I use that on the speaking channel so as to avoid the ghastly noise.
You could also nab the mono out channel with an array of adapters (XLR - 1/4" to female 1/4" to RCA). I've had to do this because the sunday school folks need music to play through the youth ministry audio system, but don't want to use the big mixer so I've had to take a 1/8" to RCA to rca- 1/4 male, to two female barrel 1/4" adapters to male 1/4" to xlr adapters and ran the xlr since it's a thicker cable and you can longer lengths to the smaller mixer on stage and from there it is converted back to 1/4".
Mmhmm, the world of making two audio systems coexist in the same room with the same speakers when you a budget of $40.00.