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HD 280 PRO

Article No. 004974

Intro
Description
Technical Data
Accessories
Variants

Key Features

rotating ear-pieces
Lightweight and comfortable
Collapsible rotatable earpieces
excellent for use in high-noise environment

professional DJ Headphones

General Description

The HD 280 Pro is Sennheiser's most significant closed, circumaural headphone to be introduced in years. Designed to exceed the demands of the professional environment, the HD 280 Pro boasts extremely robust construction combined with extensive features that meet the requirements of today's most demanding applications. The unique collapsible design, combined with swiveling ear cups, offers maximum flexibility in any application.

Features

Closed, dynamic stereo headphones
Accurate, linear sound reproduction for critical monitoring applications
Optimum impedance ensures universal compatability
Space saving design features collapsible, rotating earcups
Up to 32 dB of ambient noise attenuation
Neodymium magnets for high maximum SPL
Single-sided, coiled cable with 3.5 mm mini jack with locking 1/4" adapter
Very comfortable, even if used for long periods of time
Rugged construction with user-replaceable parts
2 year warranty

Delivery Includes

1 pair of HD 280 PRO headphones
1 screw-type adapter to 1/4”

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professional DJ Headphones

Technical Data

Connection cable	Coiled cable (min1m/max 3m)
Contact pressure	6 N
Ear coupling	Around-the-ear
Frequency response (headphones)	8 - 25,000 Hz
Jack plug	3.5 / 6.3 mm stereo
Load rating	500 mW
Nominal impedance	64 Ω
Sound pressure level (SPL)	102 dB (IEC 268-7)
Total harmonic distortion (THD)	0.1%
Transducer principle	Dynamic, closed
Weight w/o cable	7.8 oz (220 g)

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professional DJ Headphones

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professional DJ Headphones

Variants

HD 280 SILVER	Model #005327	MSRP: $179.95
The HD 280 silver is a closed-back, circumaural headphone designed for professional monitoring applications. Although suitable for a very wide range of applications, the exceptional 32 dB attenuation of external noise makes the HD 280 silver particularly suitable for use in a high-noise environment.

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Glossary

Connection cable

When one speaks about headphones, the emphasis is on such things as sound quality and frequency response. There is rarely any mention of the connection cable. Most Sennheiser headphones are fitted with an OFC (oxygen-free copper) cable. This ensures linear and low-loss transmission in the broad frequency spectrum of the headphones. Many Sennheiser headphones also have detachable cables, which make it very easy to replace them.

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).

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.

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.

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MSRP: $149.95

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Private Audio

HD 280 PRO

Article No. 004974

Key Features

professional DJ Headphones

Related Products

professional DJ Headphones

General Description

Features

Delivery Includes

professional DJ Headphones

Technical Data

professional DJ Headphones

Recommended Accessories

professional DJ Headphones

Variants

Glossary

More Product Information

Purchase Information

More Information