Only the front right and front left channel work. The center and surround speakers do not work. Everything else works.
Condition
It is not fully functional.
If you just have 2 speakers, it will work great for you.
The front right and left channel work.
The center, surround left and surround right do not work.
This can be used as a pre amp.
What’s in the box?
Harman Kardon AVR 7000 Stereo Amplifier Receiver System