Legendary Denon Fidelity in a Noise Cancellation Headphone The new AH-GC30, the second-generation noise cancellation headset from Denon, was designed to build on award winning sound and comfort of its predecessor. Developed with new large 40mm FreeEdge performance tuned and Hi-Res certified drivers, the AH-GC30 maintains its natural tonal balance free from exaggerated colorations while delivering a deeply immersive listening experience perfect for music and movies. Whether traveling or at work, three modes of noise cancellation ensure peace and quiet is always at hand. The new ambient monitor means you never miss an announcement or conversation. Dual microphones deliver remarkable voice clarity when making and receiving phone calls. Ultra-comfortable, these lightweight wireless over-ear headphones are packed with advanced Denon technologies to deliver an amazing listening experience every day.