Yesterday, 3 people showed up to hear the system and it so happened they were all completely deaf. I was on my way out so i asked them to come back the next day, which was today. I had a friend who knows sign language come by and he brought a friend who is also deaf. He loves the bass too and wanted to hear it. So of course i didn't mind showing it to him. I think he loved it (from what i could tell). The other, original 3 guys, never showed up.