I bought this same head unit for my 2005 Rubicon. S160 M201
I finally found a way to get the sub to work on this!
1) Wire the "ANT-C" output from the head unit to the switched power for the SUB.
2) Then, I noticed that the sub was extremely faint. What I uncovered was that the head unit mixed up the + and - wires for the rear speakers/sub. If you swap the + and - wires for the left and right rear speakers, the SUB will work as expected. (DO NOT swap the front speaker wires, these are correct)
Other than this, it is an OK headunit. Not really worth the cost IMHO.
1) It freezes often when using IPOD mode and listening to music through phone.
2) Music over Bluetooth is unusable and sounds terrible.
3) Most of the time, my iPhone won't connect over Bluetooth automatically. Sometimes it work, but rarely.
4) Had to place all music on an SD card. Occasional skipping in the music occurs. I read this can be remedied by removing all G-Apps. So, I may try this in the future.
I hope this can help some people who bought this head unit.