Doug, you very welcome
I think that unit should be happy playing all day at that volume setting. I was thinking you were going to come back saying somewhere in the plus. I think you should give them a call and they more then likely will exchange the unit. Given that this is new. If not then you would be looking at sending the unit too an authorized HK dealer to look at it under the products warranty.
Good Luck and I hope everything gets resolved for you quickly. I know how frustrating this can be.