YOU’LL NEVER BE TEMPTED to take this headphone on the bus. The earpieces of Audio-Technica’s ATH-AD900 are huge, measuring about 4.5 inches in diameter and concealing a big 53mm driver. Unlike almost all other headphones, the ATH-AD900 does not have an adjustable band. Instead, it features a pair of spring-loaded, padded “wings” that support it on your head. The soft padding and big earcups made the ATH-AD900 super-comfortable for Howard, Joe, and me. But it felt droopy to Will, and Geoff found the feel of the wings on his bald pate intolerable after a few minutes.