The HD 650 from Sennheiser are reference-class stereo headphones designed to deliver a true audiophile experience with an open, natural sound. Specially developed acoustic silk was used to provide uniform attenuation over the entire area of each ear cup. The lightweight aluminium voice coils ensure a remarkable transient response, while the full-range drivers offer a frequency response of 10 Hz to 39.5 kHz. Great care was taken to ensure the headphones are comfortable with their elliptical design, which naturally adapts to the shape of the ear.

The HD 650 utilises a 9.8' detachable cable made from a highly conductive OFC copper with low handling noise and low structure-borne sound sensitivity. The headphones can be used with high-output mobile devices and excel with high-quality stationary hi-fi components such as SACD, DVD-A, and CD players. The HD 650 ships with the detachable cable and a 1/4" to 3.5mm adapter.

Specifications:

Type: Open-Back, Circumaural Dynamic headphones

Colour: Gray

Driver type: Dynamic

Driver Size: 1.7" / 42 mm

Voice Coil: Copper-Clad Aluminum Wire

Impedance: 300 Ohms

Active noise cancellation: No

Contact Pressure: 6.0 N

Frequency Response: 10 Hz - 39.5 kHz (-10 dB)

Impedance: 300 Ohms

Sensitivity: 103dB (1 Vrms)

Maximum Sound Pressure Level (SPL):103 dB at 1 kHz / 1 Vrms

Maximum Power Input: 500 mW

Total Harmonic Distortion: (THD) 0.05%

Connectors: 1/4" stereo detachable cable

Cable length: 10' (3 m), Detachable, Left and right side connection

Water Resistance: None

Weight: 9.2 oz / 260 g (without cable)

Warranty: Sennheiser 2-year warranty

Accessories: 6.3mm adaptor plug

Key features

- Open, Dynamic, Circumaural design; Hi-Fi stereo headphones

- Elliptical-shaped ear cups for comfort

- Audiophile sound reproduction

- Acoustic silk attenuation - Specially developed acoustic silk for precise, uniform attenuation over the entire area

- High-quality titanium/silver finish

- Extremely lightweight aluminium voice coils ensure excellent transient response

- Exceptionally comfortable to wear due to elliptical design adapted to the shape of the ears

- Systems with narrow tolerances (+/- 1 dB), hand-picked in pairs

- A specially developed damping element, made from fine acoustic metal mesh, ensures precise damping over the entire diaphragm surface, highly constant in all climates.

 - Frequency response: 10 Hz to 39.5 kHz

 - Works with portable audio devices

 - Compatible with SACD, DVD-A & CD players

 - Includes 1/4" to 3.5mm adapter

 - Specially modulated connecting cable (detachable) made from highly conductive OFC copper, Kevlar-reinforced, with very low handling noise, i.e. low structure-borne sound sensitivity

 - Can be directly connected to stationary Hi-Fi components of the highest quality, in particular, SACD, DVD-A and CD players

What's in the box:

1 x HD 650 headphones

1 x Headphones storage box

1 x Instruction manual

1 x 6.35mm to 3.5mm conversion plug

1 x 6.35mm stereo unbalanced cable (connected at the factory)