Sony MDR-ZX660AP

5 - 25000Hz, 104dB, 40mm Bring more power to your beats with the MDR-ZX660AP on-ear headphones. Large 40mm drivers deliver thumping bass, deep rhythms, and soaring highs. Beat Response Control cleans up the bass for low-end clarity without distortion, even at high volumes, while the rigid metal headband means you can listen securely in style and comfort.