Personal Audio
HD 201 - Sennheiser USA
Article No. 500155
Key Features
- Rich, crisp bass response
- Lightweight & comfortable
- Powerful sound reproduction
- Good attenuation of ambient noise
Hi-Fi Headphones - Stereo Sound
$24.95
Related product
$24.95
General Description
The ideal entry into the world of powerful stereo sound: The HD 201 has good attenuation of ambient noise with outstanding wearing comfort at an affordable price.
Features
- Sealed earcup design prevents bleed into adjacent microphones when home recording
- Rich, crisp bass response and faithful dynamic audio reproduction
- Lightweight construction designed specifically for long studio or DJ sessions
- Optimum impedance for audio interfaces or portable audio players/recorders
- Rugged materials take a beating on the road or in transport
- Hypo-allergenic earpads are comfortable all day
- 1/8" plug (3.5mm) with 1/4" (6.3mm) adapter included
- Built-tough with a 2 YEAR warranty!
- Compatible (listen only) with latest generation of tablets
Delivery Includes
- HD 201 Headphones
- ¼” (6.3 mm) stereo jack adaptor
$24.95
Technical Data
| Cable length | 9.8 ft. (3 m) |
| Ear coupling | Around-the-ear |
| Frequency response (headphones) | 21.....18,000 Hz |
| Jack plug | 3.5/6.3 mm stereo |
| Nominal impedance | 24 Ω |
| Sound pressure level (SPL) | 108 dB (SPL) |
| Total harmonic distortion (THD) | <0.7% |
| Transducer principle | Dynamic, closed |
| Weight w/o cable | Approx. 5.8 oz. (165 g.) |
$24.95
Recommended Accessories
| Part/Accessory | Article No. |
| Airplane adapter | 088526 |
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Double mono (airline) adapter for headphones - replacement for 044556 |
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| HH 10 | 510615 |
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Headphone holder for all over-the-head style headphones. ships with any new HD485 or HD595. |
|
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 (headphones) |
| The frequency response of a pair of headphones is given within limits defined by the manufacturer. |
| 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). |
| Nominal impedance |
| See impedance. |
| Sound pressure level (SPL) |
| Due to the impractical numerical values, the sound pressure is usually given as the logarithmic value of the sound pressure level according to the equation: dB SPL = 20 x log (po / 0.00002 Pa). The abbreviation SPL (sound pressure level) is added in order to make a clear distinction from other uses of dB. The reference sound pressure, which is at the same time the threshold of hearing, is then 0 dB SPL. The threshold of pain is 140 dB SPL. A difference in the sound pressure level of 1 dB is just about perceptible, while a doubling of the sound pressure corresponds to 6 dB and a doubling of the volume corresponds to a rise of 10 dB. |
| Total harmonic distortion (THD) |
| Total harmonic distortion is a measure of non-linear harmonic distortion and is given in %. Non-linear harmonic distortions are signals which were not present in the original before the signal was converted by the headphones. These unwanted signals are caused by the diaphragm, whose movements do not precisely move in time with the electric signals that cause it to move. Unfortunately, this is a feature of all electroacoustic transducers. Although it cannot be completely eliminated, suitable steps can be taken to minimise it. However, the user is not interested in why this distortion takes place but in how great the level of distortion must be for it to become perceptible. According to the findings of several research projects, a total harmonic distortion of 1% in the frequency range of 100 to 2000 Hz is imperceptible. Below 100 Hz, the perceptibility threshold lies at 10%. |
| 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. |
