Personal Audio
HD 380 PRO - Sennheiser USA
Article No. 502717
Key Features
- Impeccable detail and imaging
- Collapsible design folds and stores flat
- E.A.R. provides speaker-like presentation
- Passive noise reduction ideal for studio/live work
DJ Headphones - Professional Monitoring
$199.95
Related product
$199.95
General Description
The HD 380 Pro professional monitoring headphone is designed to exceed the demands of the professional environment. The HD 380 Pro provides an extended frequency response with increased sound pressure level (up to 110 dB) for accurate sound reproduction in demanding applications. Not only that, but the lightweight, secure and rugged design offers a comfortable listening experience for long recording sessions.
Accessories include a detachable, 3.2-foot coiled cable (extendable up to 9.8 ft.), a carrying case, and a screw-type 1/4" (6.3 mm) jack adapter.
Features
- Closed, circumaural design for excellent passive attenuation of ambient noise (up to 32 dB)
- Exceptionally lightweight and comfortable for extended listening
- Replaceable single-sided, coiled cable with 1/8 inch (3.5mm) jack connector and screw type 1/4" adapter
- Reduced comb filter effects and distortion due to E.A.R. (Ergonomic Acoustic Refinement) and Duofol diaphragms
- Includes slimline carrying case
- Built-tough with a 2 YEAR warranty!
- Compatible (listen only) with latest generation of tablets
- Replaceable earpads (part # 523310)
Delivery Includes
- Replaceable earpads (part # 523310, pre-installed)
- HD 380
- Screw-type 1/4" adapter
- Carrying case
$199.95
Technical Data
| Attenuation (passive) | Up to 32 dB |
| Cable length | 3.3 ft. (1 m) coiled, extendable up to approx 10 ft. (3 m) |
| Connector (headphones) | 3.5 mm straight (separate ¼” jack adapter included) |
| Contact pressure | 6N approx. |
| Ear coupling | Around-the-ear |
| Frequency response (headphones) | 8 - 27,000 Hz |
| Impedance | 54 Ω |
| Load rating | 500 mW |
| Sound pressure level (SPL) | 110 dB (1 kHz, 1 Vrms) |
| Total harmonic distortion (THD) | < 0.1% (1kHz, 100dB SPL) |
| Transducer principle | Closed, dynamic |
| Weight w/o cable | 7.7 oz. (220 g) |
$199.95
Recommended Accessories
| Part/Accessory | Article No. |
| Ear pads | 523310 |
|
Standard ear pads (1 pair) |
|
| HH 10 | 510615 |
|
Headphone holder for all over-the-head style headphones. ships with any new HD485 or HD595. |
|
| Plug adapter | 543684 |
|
Threaded 3.5mm to 6.5mm phone plug adapter |
|
Glossary
| Attenuation (passive) |
| Reduction in ambient noise achieved by mechanical means, such as wearing headphones or ear defenders. |
| 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. |
| 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. |
| Load rating |
| The load rating is the amount of electric power which - according to the manufacturer´s specifications - can be continuously supplied to a set of headphones over a period of time without causing damage. According to DIN 45500 Part 10, the load rating must be at least 100 mW. Testing is carried out using a special noise signal which is supplied to the headphones over a period of 100 hours. |
| 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. |
