Formerly known as the E500PTH, SE530 and SE530PTH sign bridge in a series of classic E line to a new direction the sound of Isolating Earphones Shure (SE model). Evolved from personal monitor technology road-tested pro musicians and improved by Shure engineers, SE530PTH and SE530 headphones deliver unparalleled acoustic accuracy. Triple TruAcoustic MicroSpeakers, a tweeter and dual woofers, deliver expansive sound stage with full-bodied bass to the auditory experience rivaled only live performances. Sound Isolating Design Included sound isolating sleeves block more than 90 percent of ambient noise.