What is your listening level?

I downloaded a spl meter on my HTC One Droid and it states my listening comfort zone is in the mid 50's into the mid 60's. I can't get it into the upper 70's without rattling things in the room. 80's? That just seems way too loud compared to my comfort zone. I'm wondering if the meter is calibrated correctly.

I just loaded another spl meter on my phone to compare with the first one thinking it may be out of calibration. They perform nearly identically. I had a hearing test recently with normal results. My listening comfort zone is in the mid 50's into the mid 60's. Funny thing is that my wife says I can't hear what she's saying sometimes...

When the amp is "cookin"