That's a very difficult question to answer, as there are many variables involved -- the room, the listener's hearing, psychoacoustics, placement, perceived reputation of the maker, ect, ect -- but I will hazard a very general rule. If that speaker distorts below 85 dB, most people would walk away. Just talking about it, I can't emphasize enough the APPEARANCE of the speaker : if that speaker looks good, a person's brain is going to think it sounds good. Remember, Bose made the 901 for over 25 years. And Zu Audio wouldn't be in business.