Sennheiser HD660s Open Box

Customer exchange, great condition. Boxed, Full warranty.

Sennheiser HD660s is a new improved headphone, based on the good but aging HD650 (and hd580/600). The HD660s is easier to drive, better matching the more portable sources we are all using nowadays, with both a slightly higher sensitivity and a much lower impedance of 150 ohms. Sound quality is more open with better clarity and a really clean, smooth midrange. 

HD660s are still light weight, at 260g, with deep velour pads for great comfort. There are now two cables included - one with 6.5mm plug & a 3.5mm adaptor. The second a new style 4.4mm balanced pentaconn connector that is showing up on plenty of portable and desktop amps this in 2019.

• Impedance: 150 ohm
• Sensitivity: 104dB
• Frequency Response: 10 - 41,000 Hz
• THD: 0.04%
• warranty: 2 years
• 6.5mm plug cable and 4.4mm plug cables included
• 6.5mm - 3.5mm adaptor included
• 2 years warranty