Personal Audio
HD 239 - Sennheiser USA
Article No. 504789
Key Features
- Includes storage pouch
- Versatile-use stereo headphones
- Incredible detail and balanced response
- World-famous open-aire Sennheiser acoustics
On Ear Headphones - Portable Headphones
$119.95
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$119.95
General Description
Sound enthusiasts looking for an alternative to earbuds and larger open-headphones owe the HD 239 a listen. Featuring the world-famous balance and detail of DuoFol transducers mounted in an open-aire headphone chassis, this headphone is all about performance. The listener can expect laser-like precision and extraordinary balance throughout the frequency spectrum of sound. The butter-soft hybrid earpads breathe easy and contribute to the long-term wearability of the HD 239. Each earcup rotates flat for compact storage in the included storage pouch.
Features
- Advanced Open-Aire acoustic system (does not block sound*...for the serious audiophile)
- Carrying pouch included for easy storage and protection
- Fold-flat design travels easily
- Premium metallic components and exchangeable earpads for superior performance and durability
- Compatible (listen only) with latest generation of tablets
- Built-tough with a 2 YEAR warranty!
- *for noise blocking on-ear headphones, see the HD 219 and HD 229.
The HD 239's Open-Aire speaker design is used to achieve the highest sound quality, fidelity and representation of frequency response in close proximity
Delivery Includes
- HD 239 headphones
- storage pouch
$119.95
Technical Data
| Frequency response | 16-23,000 Hz |
| Transducer principle | Open, dynamic |
| Ear coupling | On-the-ear |
| Impedance | 32Ωs |
| Max SPL | 114 dB |
| Cable length | 4.5 ft, single-sided |
| Total Harmonic Distortion | <0.5% |
| Jack plug | 1/8 inch (3.5mm) |
| UPC code | 615104218598 |
| EAN code | 4044155071931 |
| Dimensions (single) | 7.5 x 2.1 x 7.9 in |
| Weight (single) | 9.9 oz |
| Dimensions (master carton) | 16.3 x 7.3 x 9.2 in |
| Weight (master carton) | 4.7 lbs |
| Master carton quantity | 6 |
Glossary
| Cable length |
| The cable length is usually measured between the anti-kink sleeves of the cable (cable length without connectors). |
| Ear coupling |
| A distinction is made between headphones which are worn on the external ear (supra-aural) and those which surround the ear (circumaural). Open headphones have foam ear pads that rest on the ears or ring pads that surround the ears. Closed headphones, on the other hand, nearly always have circumaural ear pads. |
| Frequency response |
| The frequency response of a microphone is given within the limits defined by the manufacturer. In studio condenser microphones it is generally within the range of between 20 Hz and 20 kHz. |
| Impedance |
| Impedance expresses the AC resistance of a microphone or a set of headphones. It is dependent on frequency and is given at 1 kHz as the so-called nominal impedance. Impedance is measured in ohms. In recent years, an industrial standard has developed, setting the impedance of headphones at 50 or 600 ohms. Sennheiser headphones are manufactured according to this standard, thus practically ruling out connection problems. With microphones, the input impedance of the following microphone amplifier should have at least three times the value of the nominal impedance, in order to prevent it from unnecessarily attenuating the microphone signal. |
| Jack plug |
| A common audio connector in consumer electronics and music industry. Available in various diameters; in the hi-fi segment, 1/8" and ¼" are widely used. Poles range from one to four. (Examples: headphone jack or jack of an electric guitar). |
| Transducer principle |
| Two transducer principles have become established for the conversion of electric energy into mechanical energy: electrodynamic and electrostatic transducers, whereby the latter is only to be found in audiophile systems, due to their relatively high manufacturing costs. Electrodynamic transducers basically consist of a ring-shaped permanent magnet and an oscillation coil, which is fixed to the receiver diaphragm. When an audio-frequency alternating current is passed through the oscillation coil, it is caused to vibrate in accordance with the audio-frequency alternating current, thus causing the diaphragm to vibrate in the same way. |
