I’ve had my CI Uniti 102 for 3 weeks and am amazed about its performance. Currently I have one subwoofer connected using the red subwoofer output but there’s a white output above it. Does this mean I can connect another subwoofer to it?
The Sub/AUX out is stereo, hence why two sockets. If you are connecting your sub via just one socket then you are only feeding the subwoofer bass from one of the channels.
Does your sub only have a single RCA input socket? Most subs designed primarily for music rather than AV use have a two channel input which would use a stereo cable. To answer your question, yes, a second sub connected to the other RCA output would work.