Kolom HsGautama

Sekarang bicara tentang perbedaan terbesar user yg memakainya.
Jika digolongkan, maka sebetulnya cuma ada dua golongan konsumen yg memakai headphones. Pertama golongan khalayak luas, yakni mereka yg membeli headphones karena suka mendengarkan musik dengan kenyamanan ekstra, entah itu dia seorang audiophile tulen atau cuma sekedar dengar musik saja jrang-jreng.

Kedua yakni golongan professional yg karena tuntutan pekerjaannya butuh headphones dengan speks teknis tertentu dan spesifik untuk presisi monitoring suara, disini salah satunya adalah audio engineer, DJ, audio recordist, audio mixing, atau pekerja broadcasting. 

Headphones jelas beda dengan earphones, dimensinya lebih besar, karena itu peralatan teknis yg terpasang didalam sepasang unit headphones pun lebih besar penampang engineering nya, oleh sebab itu sebetulnya secara teknis kemampuan headphones merespon suara lebih optimal jelas lebih baik dari earphones, ini soal kenyamanan telinga juga.

Seseorang yg mau mengeluarkan uang untuk membeli “headphones bagus” artinya dia memang menginginkan kenyamanan ekstra dan “kemewahan dentum audio” yg tdk akan ditemui di earpones. Sambil becanda saya bilang, jika kamu sudah pengen beli headphones bagus yg harganya sejuta, maka kalian termasuk golongan manusia pilihan “yg mengalami pencerahan”, enlighting ears. Telinga ini pasti sudah tau apa bedanya suara “ancur” dan suara “bagus”.

Sennheiser HD 205 lansiran Sennheiser, salah satu pemain terkuat didunia ini untuk urusan audio, adalah headphones spesifik yg ditujukan untuk kalangan pro yakni DJ dan profesi audio engineer yg terkait didalamnya. Ini bukan headphones buat “sekedar dengar suara ”, HD 205 memang untuk kebutuhan monitoring audio yg akan memberikan output presisi. Jadi speksnya memang termasuk istimewa dan memberikan kemewahan mendengarkan audio yg sangat baik.

Sisi istimewa lainnya adalah, HD 205 mempunyai kekuatan membekap kedua telinga dengan rapat melebihi headphones manapun dipasaran saat ini. Dengan busa tebalnya yg nyaman dimangkoknya, dan begitu ketatnya ia menutup telinga, maka pendengarnya seolah terpisah dalam dunianya sendiri karena akan mencegah meresapnya suara dunia luar kedalam telinga. Membayangkan seorang DJ sedang memakai ini disebuah ruangan krodit dipenuhi ratusan manusia dan dentuman gila suara speakers, maka masuk akal jika HD 205 memang didesain sangat kuat menutup telinga.

Satu sisi hal ini memang bagus, tapi sisi lain yg akhirnya terasa buruk, jika boleh dikatakan begitu, saya rasa saking kerasnya dia membekap telinga, maka bisa membuat telinga agak panas. Apalagi jika memakai kacamata spt saya, tekanan gagang kacamata terasa sangat kuat diarea sekitar telinga akibat tekanan ekstra dari HD 205. Buat yg betah mungkin gak merasa apa apa, tapi buat saya ini masalah kecil yg terasa. Mungkin memang fungsinya sebagai alat monitoring pro, dia tidak dipakai terus terusan ditelinga, tapi cocok untuk satu sesi atau sekian sesi kerja saja. Bukan untuk 3 jam pakai ini nonstop.

Perbedaan mencolok lainnya, headphones ini bisa diputar mangkoknya shg membiarkan satu telinga terbuka mendengarkan suara lingkungan (ambient sound). Dikalangan audio mixer spt Dj, mencampurkan musik perlu juga mendengarkan hasilnya  yg keluar di speaker, karena itu daripada repot copot pasang headphones dikepala, maka dia dapat memutar mangkok alat ini satu keatas dan sisi satunya tetap menempel ditelinga. Sebuah desain yg bagus yg memang ditujukan buat kepentingan pro yg butuh dengan fungsi semacam ini.

Tulisan sebelumnya ttg audio disini: 1  2 
Website Sennheiser.

General Description

The HD 205 provide an excellent sound quality and a brilliant shielding of ambient noise.
The rotatable ear cup as well as the single-sided cable make them a professional companion even for DJ's.
The HD 205 come with a convenient protective pouch for storage and transportation.

Technical Data

          Nominal impedance                                32 Ohm

          Jack plug                                                       3,5/6,3 mm stereo

          Transducer principle                                dynamic, closed

          Ear coupling                                          supraaural

          Cable length                                          3 m

          Weight w/o cable                                   206 g

          Frequency response (headphones)            14 -- 20000 Hz

          Sound pressure level (SPL)                       112 dB(SPL)

          THD, total harmonic distortion                   < 0,5 %

Features

          Medium-sized dynamic, supraaural headphones

          For compact systems or mobile players (32ohm)

          Powerful stereo sound

          Outstanding passive attenuation of ambient noise

          Rotatable ear cup for one-ear listening

          Highest wearing comfort for long music sessions

          Comfortable head- and ear pads

          Convenient protective pouch included

          3.5 mm jack plug and ¼“ (6.3 mm) screw-on jack adaptor, gold-plated

          Single-sided cable

          2-year warranty

Delivery Includes

          Stereo headphones HD 205

          6,3 mm screw-on jack adapter, gold-plated

          Protective pouch

Technical Data

          Nominal impedance                                32 Ohm

          Jack plug                                              3,5/6,3 mm stereo

          Transducer principle                                dynamic, closed

          Ear coupling                                          supraaural

          Cable length                                          3 m

          Weight w/o cable                                   206 g

          Frequency response (headphones)            14 -- 20000 Hz

          Sound pressure level (SPL)                       112 dB(SPL)

          THD, total harmonic distortion                   < 0,5 %

Glossary

          Nominal impedance

          See impedance.

          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).

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).

          Weight w/o cable

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%.