Sennheiser HD 560S. High-quality Sennheiser sound produced by a high-performance 38mm dynamic driver using new materials. Impedance 120Ω, Sensitivity 110dB(1kHz, 1V). Velour ear pads. Furthermore, the diaphragm is a 120-ohm transducer that uses a new material for the diaphragm, reproducing highs above 10 KHz with a high-quality and extended sound spread.