STUDIO HEADPHONES Professional Reference Studio Headphones. Closed Design. Crystalline Treble and Solid Bass. Self-adjusting headband. Comfortable for long wear times. Frequency response: 10 - 30 kHz. Sensitivity: 94 dB. Max Power: 1200mW. Speaker diameter: 53 mm. Jack 1/4 'adapter included. Headphone very suitable for educational centers due to its resistance and the possibility of hanging them on wall hooks thanks to the resistant, non-deformable outer wire headband.