AKG Acoustics K7XX Black Headphones

Nearly brand new and not even broken in. I bought these on Massdrop to demonstrate some headphone preamp outputs but never used them besides that. I simply prefer loudspeakers. These are in mint condition with no problems or issues. They have been inside a drawer for almost a year.  The protective plastic film is still on the ear cups.

These headphones have been tweaked to deliver an extended frequency response and a wide, locationally specific soundstage that puts you closer to the source than most cans. The highs were boosted by an innovative flat-wire voice coil, the mids were brought up to better balance the range, and the lows were jacked up by 3 dB for fully immersive sound imaging. To make sure the channels are synced up and well balanced, each transducer is individually tested and paired to a transducer with the closest possible sound signature. 

Built with your comfort in mind, the adjustable leather headband and memory-foam ear pads can be worn for hours at a time without fatigue. AKG removed the bumps that come standard on their headbands, giving you a fully smooth surface, and the nearly 10-foot cable is detachable and can be easily replaced if the need arises. To set the K7XX apart even further, the inside of the frame features the Massdrop logo on one side and an individualized serial number on the other. Finally, the black-on-black colorway brings a sleek style that doesn’t have to scream to stand out.

Specs

• Configured by Massdrop

• Manufactured by AKG

• Open-back construction

• Preselected dynamic transducers

• Flat-wire voice coil

• Varimotion 2-layer diaphragm

• Genuine leather headband

• Memory-foam ear pads with velour covering

• Individually tested and numbered

• Detachable 9.8 ft (3 m) straight cable with ⅛ in (3.5 mm) jack

• Frequency response: 10–39,800 Hz

• Sensitivity: 105 dB/V

• Maximum input power: 200 mW

• Rated impedance: 62 ohm

• Weight: 8.3 oz (235 g)