Sennheiser HD 660S2

Enjoy your music on a completely new level. An intimate, relaxed sound signature combines with outstanding precision and exceptional comfort — and now, extended sub bass — for a deeply moving experience.

Features
Uniquely powerful vented magnet system for minimized distortion
Intimate sound with great timbre and deep, accurate sub bass
Outstanding quality designed in Germany, made in Ireland
Ultra-light aluminum voice coil with 300-ohm impedance for excellent impulse response
Plush ear cushions and open design for maximum comfort

Specifications
Impedance: 300 Ω
Connector: Stereo jack plug, gold-plated 6.35 mm, unbalanced, 3-pin 4.4 mm, balanced, 5-pin
Frequency response: 8 – 41,500 Hz (-10 dB) 
Sound pressure level (SPL): 104 dB at 1V 1kHz
Ear coupling: Over-ear (circumaural) 
THD + N, total harmonic distortion and noise: < 0,04% (1 kHz, 100 dB) 
Transducer principle (headphones): Dynamic, open
Weight w/o cable: Approx. 260 g (without cable) 
Made in Ireland
Woo Audio is an authorized reseller

In the box:
HD 660S2 headphone x 1
1.8m, 4.4mm Balanced cable x 1
1.8m, 1/4" TRS cable x 1
1/4" to 3.5mm adapter x 1
Storage pouch x 1