KOSS Headphones PRO4AA Over-Ear

• Noise isolating professional studio headphones
• The first dynamic headphones to deliver true full frequency
• Standard-setting design incorporates performance-enhancing technology
• Superior isolation, accurate sound reproduction and high fidelity performance
• Durable steel and generously padded rubber headband
• Adjustable slide bars ensure snug fit
• 8 foot coiled cord with 6.3 mm (1/4") plug

Koss Pro 4AA became the studio standard in the USA in 1970. Today, Koss has further developed it with a new main frame, titanium-plated polymer diagrams and oxygen-free copper-clad aluminum number coil. It is heavy and very insulating. It can handle very high volume without cracking the elements. The soft air-filled ear cushions close very tightly around the ears and provide very good attenuation against ambient sounds. New main arch is designed for best comfort and maximum durability for DJs and music studios.

Specification
Frequency range: 10-25 000 Hz
Cable: 2.4 m spiral cable
Contact: 6.3 mm
Weight: 505 g
Sensitivity: 96 dB SPL / 1 mW
Impedance: 250 ohms
Distortion: <0.1%.