Denon’s AH-C252 advanced in-ear headphones, which are equipped with our exclusive Acoustic Optimizer

Denon’s AH-C252 advanced in-ear headphones, which are equipped with our exclusive Acoustic Optimizer technology that provides balanced diaphragm sound pressure, minimizing cavity-induced colorations. The comfortable hybrid design provides hours of fatigue-free listening, and the in-ear design shuts out external ambient noise. Large 11.5mm Neodymium-driven diaphragms provide authoritative deep bass response, with an extended frequency range all the way up to 23 kHz.