I tested out the 1014 and found it's power rating to be fairly exaggerated. With just 2 bookshelf speakers full range, MCACC off and pure direct on, it really didn't have the balls that it's power rating would suggest. What you're saying doesn't surprise me at all. At low volume, it sounded fine, but when I cranked it to see what it was capable of, it didn't do as well as I expected.
Try Brian's recommendations. Also, consider calibrating it manually. Make sure your mic is in the correct location when running MCACC, then check the settings that it made once it is done to see what it did.