Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not Happy

I knew it was a lower level receiver, but I figured with all the bells and whistles it was worth a shot. It's packed with goodies and fairly easy set-up. After a couple of days hooked up to my older Yamaha towers(8ohm) I tried to air it out a little. It broke my heart. At just over half it kept shutting down into protect mode. It was not even getting a chance to overheat. It was sitting on the floor out in the open and it couldn't keep up. I wasn't trying to rattle the windows and it would repeatedly shut down. I sent it back and stepped up to a Marantz and haven't looked back.