Utilizing Sennheiser's mastership of acoustic properties, the HD 700 delivers an advanced acoustic DNA never before heard in headphones.
Beginning with an angled transducer, the 700 angles sound to mimic the positioning of a set of reference monitors. This, in tandem with the DuoFol diaphragm, provides a wide sound stage with ultra-fast response and rest times: close your eyes and you are in the front row. A great headphone transducer is only half of the equation. Sennheiser's acoustic team used the HD 700 project as motivation to obtain a cleaner, purer sound in unconventional ways and thus the patent-pending ventilated magnet system was born. By venting the magnet laying behind the diaphragm, airflow was properly managed and overall turbulence was minimized. This advancement did not add to the sound- but subtracted an artifact from it. The results? Purity.
The outer transducer chassis was also considered as a component of shared acoustic duty. By utilizing a specialty steel mesh molded to the natural shape of the acoustic sum, the open-aire system remained pure while properly directing airflow. These techniques combine to support the impeccable capabilities of the transducer with world-class, practical acoustic management.
Borrowing a design cue from the flagship HD 800, the HD 700 also utilizes a vibration damping frame-- strategic layering of materials to aide in eliminating unwanted resonances from entering the acoustic chamber. The culmination of these technologies lends to the warm, detailed, balanced and utterly revealing sonic signature that is luxurious and practical for the audiophile purist.
Features
Angled transducer mimics the positioning of a set of reference monitors
DuoFol diaphragm provides a wide sound stage with ultra-fast response and rest times
Patent-pending ventilated magnet system to manage airflow for ultra-low THD
Specialty steel mesh molded to the natural shape of the acoustic chamber
Vibration damping frame eliminates unwanted resonances from entering the acoustic chamber
Ships in a luxurious storage box to protect the headphones
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
The frequency response of a microphone is given within the limits defined by the manufacturer. In studio condenser microphones it is generally within the range of between 20 Hz and 20 kHz.
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.
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.
