I always wondered about this but I notice many people say 10% THD is not really good or something but how can I tell if the speakers are making 10% THD if it didn't say it was? Meaning can you hear the distortion coming out of the speakers? Or do you have to set it to a certain volume to hear it? I kinda wonder if I can hear the THD distorion coming out of my Cyber Acoustics CA-3554 speakers since they are rated at 10% THD. I' am assuming you can hear 10% THD when you play the music. I just don't know when it's doing the 10% or not or how it sounds when it's at 10% THD.