RHA SA500 On-Ear Portable Black Headphones ? 3 Year Warranty High Performance Headphones with a Detachable Cable The SA500s are closed back, dynamic headphones with a highly detailed and balanced response across the audio spectrum. The 40mm Mylar speakers are driven by powerful neodymium magnets and CCAW coils, ensuring crystal clear audio and resounding, distortion-free bass. A detachable, tangle free cable prevents connection problems, whilst the matt finish gives the SA500"s a subtle, understated look. The SA500s come with a 3 Year Warranty as standard.