Can I connect a Sub to a Photo Stage?

Hi, guys I am using a Clearaudio Balance Plus Phono Stage which it has XLR and RCA outputs. They are both active when you connect direct to the mono amplifier(s) and that is what I want to do using XLR outputs! Now my question is... can I use available RCA output to connect active Subwoofer ether using right or lift channel? or i might harm my Clearaudio phono stage?
If your phone stage connects directly to the power amp and you use the phono stage to control volume than yes, you can connect a sub to the phone stage.

If you connect the phono stage to a preamp and use the preamp to control volume than you should connect the sub to the preamp.
You can connect both at the same time. I have a balanced reference and I do it.