สุดยอดหูฟังแบบปิด Sennheiser HD201 เบสแน่น เสียงใส ราคาสุดๆ รับประกันจากบริษัท 2 ปี
สุดยอดหูฟังแบบปิด Sennheiser HD201 เบสแน่น เสียงใส ราคาสุดๆ รับประกันจากบริษัท 2 ปี
ราคาพิเศษสุดครับ ปกติ 1250บาท
ขาย 980 บาท ถ้วนครับ
http://www.1electronic.net
1banmor@gmail.com
086-7755757
General Description
The HD 201 is a pair of closed, dynamic stereo headphones for the budget-conscious music lover, featuring powerful sound reproduction, good attenuation of ambient noise and outstanding wearing comfort.
Features
Powerful sound reproduction
Rich, crisp bass response
Lightweight and comfortable to wear
Good attenuation of ambient noise
Extremely rugged
High-quality leatherette ear pads
Gold-plated ¼ (6.3 mm) jack adaptor
2-year guarantee
Delivery Includes
HD 201 Headphones
¼ (6.3 mm) stereo jack adaptor
Technical Data
Jack plug 3,5/6,3 mm stereo
Nominal impedance 24 Ω
Weight w/o cable ca. 165 g
Transducer principle dynamic, closed
Ear coupling circum-aural
Cable length 3 m
Frequency response (headphones) 21.....18000 Hz
Sound pressure level (SPL) 108 dB(SPL)
THD, total harmonic distortion <0,7 %
Glossary
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.
Weight w/o cable
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.
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.
Cable length
The cable length is usually measured between the anti-kink sleeves of the cable (cable length without connectors).
Frequency response (headphones)
The frequency response of a pair of headphones is given within limits defined by the manufacturer.
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.
THD, total harmonic distortion
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%.
Glossary
Recommended Accessories
Description Product Article No.
Variant
Product Article No.
Test results
Getestet durch Ausgabe Testergebnis
Audio 10/2006 gut, Oberklasse/ Testsieger
ราคา : 980 บาท
สนใจติดต่อคุณ : ป๋อง
ได้ที่ โทร/e-mail : 0867755757 / Click เพื่อส่ง Email
เว็บไซต์ http://www.1electronic.net
IP : 58.9.174.xx
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