Keep in mind that the 990 does not allow you to configure the unit for only one rear speaker. This was something I had hoped they would have corrected in the firmware upgrade, but they did not. As they told me you just have to use modes like NEO-6, but it sucks that you can not use Dolby PLIIx. Well you can but there could be something missing.

I guess I will have to build something to mix the two rear channels before sending the output to the amp.