4x HD9 headphones and 1 HP4 headphone amplifier for ultimate monitoring flexibility

• HD9 headphones - closed back, circumaural acoustic design
• Two-way, 180° cup rotation
• Tailored frequency response (10 Hz - 26 kHz) with accurate low-frequencies | high-power handling (1, 800 mW @ 40Ω, 900 mW per channel)
• 10 foot (3M), straight, single-sided cable with 1/8 inch Connector