The Sennheiser IE 500 PRO in-ear monitoring headphones in Smoky Black [B-Stock] are designed for discerning musicians, sound engineers, and audiophiles who demand exceptional clarity, precision, and a robust build for live performance and critical listening. Utilizing Sennheiser's innovative TrueResponse technology, these earphones feature a single, dynamic 7mm driver that delivers a wide frequency response with incredible resolution, avoiding the phase issues often associated with multi-driver systems. They provide a powerful yet nuanced sound, revealing details across the entire spectrum. The ergonomic, flat design ensures a comfortable, secure fit even during prolonged use, while the durable cable is detachable and designed for touring conditions. "B-Stock" indicates the item may have minor cosmetic imperfections or was previously opened, but is fully functional and inspected to perform to Sennheiser's high standards.