Quad balanced Armature drivers, specially designed for the live sound Series Acoustic sound pipe, constructed of stainless steel and high-durability resin, provides improved high-frequency reproduction Flexible memory cable Loops over ears for a custom fit and long-wearing comfort Detachable 1.2 m (3.9') cable, with newly developed A2DC (Audio Designed Detachable Coaxial) connectors at the headphones, offers exceptional durability and optimized audio performance In-line control with mic for answering/ending calls and controlling music & video playback Featuring quad balanced armature drivers specially designed for the ls “live sound” Series, the ATH-LS400IS in-ear headphones deliver clear, immersive audio with full, powerful bass. Each Housing contains one mid-frequency and one high-frequency driver, along with two low-frequency drivers, resulting in incredibly well-balanced sound across the entire frequency range, and including strong, fully realized bass.