I use two compacts with the Yamaha S950. It works great, along with the onboard speakers. Like you said, I place mine to each side and slightly to the rear. No feedback. Works great. I wish the compacts had a few more of the small speakers. What is it now, 6? I’d like about 9 or 12 per column. I had the Model II at one time, so I’m aware of the difference between the two models.