Key Features
- Sealed, on-the-ear design
- Efficient, neodymium magnet drivers
- Explosive bass for dance and hip-hop
- Exceptional noise blocking capability
closed headphones, sound proof headphones
closed headphones, sound proof headphones
General Description
Conquer the urban jungle with the HD 228 - the ideal headphone for your lifestyle. These headphones provide massive bass performance as well as a simple, comfortable fit that blocks noise.
Features
- Bass-enhanced sound for deep, massive bass
- Closed, on-the-ear design blocks outside noise; creates a controlled environment for better sound
- Fold-flat design transports easily
- Optimised for iPod, iPhone, MP3 and CD players (iPhone and iPod are trademarks of Apple Inc., registered in the U.S. and other countries.)
- 2-year warranty
Delivery Includes
closed headphones, sound proof headphones
Technical Data
| Cable length |
4.5 ft. (1.4 m.) |
| Ear coupling |
On-the-ear |
| Frequency response (headphones) |
18 - 22,000 Hz |
| Impedance |
24 ohms |
| Jack plug |
1/8" (3.5mm) headphone |
| Sound pressure level (SPL) |
110 dB (1kHz/1Vrms) |
| Total harmonic distortion (THD) |
< 0.5% (1kHz/100dB) |
| Transducer principle |
Dynamic, closed |
| UPC code |
615104167896 |
| EAN code |
4044155043433 |
| Dimensions (single) |
8.3 x 8.0 x 1.8 inches |
| Weight (single) |
0.50 lbs |
| Dimensions (master carton) |
12.0 x18.6 x 13.8 |
| Weight (master carton) |
11.0 |
| Master carton quantity |
12 |
closed headphones, sound proof headphones
Recommended Accessories
| Part/Accessory |
Article No. |
| HH 10 |
510615 |
Headphone holder for all over-the-head style headphones. ships with any new HD485 or HD595.
|
closed headphones, sound proof headphones
Variants
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. |
| 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). |
| 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.
|
| 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. |
