How Many Blind People Does it Take to Know that Your Speakers are the Best? Double-blind, single-blind, ABX, all these terms and more are bantered about on the forums and elsewhere when discussing someone's subjective experience with a piece of audio equipment. This editorial is meant as a primer for the testing methodologies used to validly measure someone's subjective experiences. This article explores various testing methodologies while also discussing some of the hidden biases that may exist.\n\n\nDiscuss "Overview of Audio Testing Methodologies" here. Read the article.