Private Audio
HD 555
Article No. 005342
Key Features
- E.A.R.-Technologie
- Advanced Duofol diaphragms
- Extended, spatial sound field
- Ideal for home cinema & music
surround sound headphones, stereo
Related Products
surround sound headphones, stereo
General Description
The HD 555 features a special internal Surround Reflector, which generates an extended spatial sound field, making it the ideal headphone for home theater, as well as music. Other innovative features include Sennheiser's E.A.R.technology and optimized Duofol(tm) diaphragms for a new level of audio enjoyment. Overall listening pleasure is combined with outstanding wearing comfort.
Features
- Open-Aire ™,circumaural,dynamic,stereo headphones
- Ergonomic Acoustic Refinement (E.A.R.)enables ideal sound
- channeling for a new kind of listening experience
- State of the art,advanced Duofol diaphragms
- Highly optimized,field-strengthened neodymium ferrous magnet systems
- Outstanding comfort for long listening sessions
- Velour ear pads even allow wearing eyeglasses without loss of comfort
- Longevity through exchangeable components
- Lightweight aluminium voice coils for high efficiency and excellent dynamics
- Surround reflector improves spatial sound characteristics
- 2-year warranty
Delivery Includes
- HD 555 headphones
- Adaptor to 3.5mm jack
surround sound headphones, stereo
Technical Data
| 9.8 ft. (3 m) | |
| 3.5 N | |
| Around-the-ear | |
| 15.....28,000 Hz | |
| 6.3 mm stereo (3.5 mm Adapter) | |
| 50 Ω | |
| 112 dB (1 kHz and 1 Veff) | |
| < 0.2 % | |
| Open, dynamic | |
| 9.2 oz. (260 g) |
surround sound headphones, stereo
Recommended Accessories
Glossary
| Cable length |
| The cable length is usually measured between the anti-kink sleeves of the cable (cable length without connectors). |
| Contact pressure |
| The wearing comfort of a set of headphones is determined not only by its weight but also by the force with which the earpieces are pressed onto the ears. This force is given in newtons (N), whereby 1 N corresponds to the compressive force which a mass of about 100 g exerts on a solid surface. The DIN Standard 45500 Part 10 limits the maximum permissible contact force to 5 N. Values of between 1.3 and 4 N are common, although lower values apply for open headphones. Higher values can be found in the case of closed headphones. Here, a higher contact pressure is required in order to achieve sufficient sealing, which is important for the reproduction of low frequencies. |
| 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. |
| 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. |