Usatanga Iko Amplifier's Quality PaMvura Yayo Yese
Chinhu chinonyanya kumira muInternet uye pepanhau Ads for amplifiers, stereo, uye home theater receivers, ndiyo watts-per-channel (WPC). Mumwe anogamuchira ane 50 Watts-Per-Channel (WPC), imwe inayo ine 75, uye imwe inayo ine zana. Kwete Nenzira.
Vanhu vazhinji vanofunga kuti mamwe watts anoreva zvakawanda. Anoplifier ne 100 WPC inopetwa kakawanda se 50 WPC, kurudyi? Kwete chaizvo.
Nheyo dzeSimba Dzakatorwa Dzinganyengera
Kana zvasvika kune chaiyoiyo amplifier power output, kunyanya nevanopoteredza inzwi rinogamuchira , zvakawanda zvinobva pakuvimbika kwokuti muiti anogadzira simba rekubudiswa kwemasimba rinosarudza kukurudzira. Paunoona zviVhuti kana chiziviso chekugadzirwa kwezvinhu apo muiti anotaura simba rekuyera, haugoni kutora nhamba iyoyo pahutano hwepamusoro. Iwe unofanirwa kutarisisa zvakanyanya pane izvo zvigadzirwa zvinogadzirisa zvataurwa pamusoro.
Semuenzaniso, mumusha wemitambo yakagadziriswa vane magadzirirwo emasereti 5.1 kana 7.1 , inonzi yakashambadza yakashambadzirwa yakagadziriswa iyo yakagadziriswa inotyaira imwe chete kana miviri nzira imwechete, kana iyo inotsanangurwa yakagadziriswa apo yese nzira kutungamirirwa pamwe chete? Mukuwedzera, kwaive kuyerwa kunoshandiswa uchishandisa 1 kHz test tone, kana ne 20Hz kusvika 20KHz test tones ?
Mune mamwe mazwi, kana iwe ukaona kuwedzera kwemagetsi ekutengesa kwema 100 watts-per-channel pa1 kHz (iyo inonzi inowanikwa mukati-kati-kuruferensi referenti) nemugwagwa mumwe chete unotungamirirwa, chaiyo-yakashambadza mashizha kana zvikamu 5 kana zvinomwe kushanda panguva imwe chete kumativi ose ehurukuro ichave yakaderera, zvichida kusvika 30 kana 40% pasi. Chiratidzo chakanaka ndechokuisa chiyero apo miviri miviri inotungamirirwa, uye, pane kungoshandisa 1kHz tone, shandisa tambo 20Hz kusvika 20kHz, iyo inomiririra huwandu hwehuwandu hwehuwandu hwehutano hwevanhu hunogona kuva nadzo. Asi zvakadaro, izvo zvakadaro hazvifungi zvakakwana simba rekusimudza simba rekugadzirisa apo nharaunda dzose dzinotungamirirwa.
Kune rumwe rutivi, havasi nzira dzose dzinoda simba rimwechete panguva imwechete apo kuchinja kwehutano hwehupenyu kunopindira zvinodikanwa zvega rimwe nerimwe pane chero nguva ipi zvayo. Semuenzaniso, bhadhiyo inonzi soundtrack ichange ine zvikamu apo chete magedhi epamberi anokwanisa kutarisirwa kubuda kwemasimba, asi mitsara yakakomberedza inogona kunge yakangoerekana yakaderera pasi mazwi emisasa. Nenzira imwecheteyo, nzvimbo dzakapoteredza dzinogona kudanwa kuti dzibudise simba rakawanda nokuda kwekuputika kana kuparara, asi mitsara yapamberi inogona kusimbiswa panguva imwe chete.
Kubva pamamiriro iwayo, simba rekutsanangurira magetsi rinowedzerwa muchirevo chemashoko rinonyanya kuenderana nemamiriro ezvinhu chaiwo enyika. Mumwe muenzaniso waizova 80 Watts-per-channel, yakayerwa kubva pa20Hz kusvika 20kHz, 2-chiteshi chinotungamirirwa, 8 ohms, .09% THD.
Zvose izvo zvinoreva izwi ndezvokuti iyo amplifier (kana kuti imba yemitambo receiver) ine simba rekubudisa 80-WPC (iyo inopfuura yakakwana kuvhesi yekuraira yekurara), achishandisa toni dzekuedza pamusoro pehuwandu hwehutano hwevanhu, apo miviri miviri iri kushanda nemirairo 8-ohm speakers . Zvimwewo zvinosanganiswa ndezvokuti kukosha kunokonzerwa nechikonzero ichocho (kunonzi THD kana kukanganisa kwakazara kwehurmoni) chete .09% - iyo inomiririra yakachena izwi rinowanikwa (zvimwe pamusoro peTT gare gare munyaya ino).
Simba Rinoenderera mberi
Chimwe chikonzero chekufunga nezvazvo ndiko kukwanisa kwomunhu anogamuchira kana anogadzirisa kuti abudisire simba rawo rinopfuurira. Mune mamwe mazwi, nekuda kwekuti mupiki wako / amplifier angave akarongwa seanokwanisa kubudisa 100 WPC, haireve kuti inogona kuita izvi chero nguva ipi zvayo yakareba. Nguva dzose iva nechokwadi chokuti kana iwe uchitarisa Zvido, kuti WPC inotarirwa inowanikwa mumirairo yeRMS kana FTC, uye kwete mazwi akafanana nePeak Power kana Maximum Power.
Decibels
Nhamba dzakanaka dzinowanikwa muDecibels (dB) . Nzeve dzedu dzinoona kusiyana kwehuwandu hwevheji mumutambo usina kufanana. Nzeve dzinenge dzisinganyanyi kunzwa inzwi sezvo inowedzera. Zvinyorwa zvinokonzerwa nelogarithmic yezwi guru. Kusiyana kwerinenge 1 dB zvishoma zvishoma zvinonzwisisika kuchinja muhuwandu, 3 dB inoshanduka kuchinja muzwi, uye anenge 10 dB inofungidzirwa kuwirirana kaviri yehuwandu.
Kuti ndikupe pfungwa yekuti izvi zvinoratidzika sei kumamiriro ezvinhu chaiwo emitemo inotevera yakanyorwa:
- 0 dB ndiyo chikumbaridzo chekunzwa
- Whisper: 15-25 dB
- Mhere-mhere yepamusoro: inenge 35 dB
- Musha wakajairika kana ofisi iri kumashure: 40-60 dB
- Kazhinji kutaura izwi izwi: 65-70 dB
- Mhedziso yemakumbo: 105 dB
- Rarama Rwiyo rwenhare: 120 dB +
- Pain Threshold: 130 dB
- Jet ndege: 140-180 dB
Kuti chimwe chekudzidzira chipfuure kubereka inzwi kaviri zvakadzama sechimwe muzvigadziro, unoda katatu kuwedzerwa mvura. Chigadziro chakakosha pa 100 WPC chinokwanisa kuwedzera kaviri yehuwandu hwema 10 WPC amp, chigadziro chinonzi paWPC 100 chinofanira kuva 1WPC inopetwa kaviri. Mune mamwe mazwi, ukama huri pakati pehuwandu nehuwandu hwemhepo hunonzi logarithmic panzvimbo yepakati.
Kupotsa
Mukuwedzera, unhu hwemugadziridziri hausi kungoonekwa chete mumvura yakasvibiswa uye kuti inowanikwa sei. Chigadziro chinoratidza ruzha rukuru kana kukanganisa pamanzwi makuru ehurukuro inogona kunge isina kuwanikwa. Iwe uri nani kunze nechimukoti chema 50 WPC ine nhamba yakaderera yokusavhiringidza iyo yakawedzera simba rinokurudzira rine maitiro akasiyana-siyana ekutsausa.
Zvisinei, kana uchifananidza kupesana kwepakati pakati pemagetsi kana imba yemitambo yekugamuchira - zvinhu zvinogona kuwana "makore" - sezvamungaona, pane shanduro yacho, kuti chigadziri kana kuti mupikiri A chingangodaro chakanyatsorondedzerwa kuongororwa kwe .01% pa100 Watts , apo mumiririri kana mutorikiri B angangodaro aine mararamiro akasiyana-siyana ekurasika kwe1% pamashizha makumi mashanu emitengo.
Iwe unogona kufungidzira kuti amplifier / muteveri A angave ari mupiririri nani - asi iwe unofanira kufunga kuti kuwedzereka kwekukanganiswa kwevaviri kugamuchira hakutsananguri kune simba rimwe chete rinobuda. Zvichida kuti vose vanogamuchira vanogona kunge vakafanana (kana kuvhara) kukanganisa kuenzanisa kana vose vari kutamba pa 100 watts zvakabuda, kana apo mutambi A wakashandurwa kuti atore 150 watts, inogona kunge yakafanana (kana yakaipisisa) kusiyanisa nhamba seReceiver B .
Kune rumwe rutivi, kana chigadziri chinokonzera kukanganisa kwe1% pane 100 watts uye imwe inokanganisa kuongororwa chete .01% pa 100 watts, zvino zvakajeka zvikuru kuti mumiririri kana mupiki ane ndiye anogamuchirwa zviri nani, kunyanya maererano nezveshoko iroro.
Semuenzaniso wekupedzisira, kana iwe uchitenderera kune chikwata chemugadziri kana mutevedzeri uyo ane tsananguro yakasvibiswa ye 10% pa 100 watts, inenge isingaverengeki pane iyo simba rekubudisa simba - zvinoita kuti inzwe ichinzwika, isina kupesana zvishoma, pa simba rakaderera rinobuda muzinga. Zvisinei, kana iwe uchimhanya mune chero chidimbu chemugadziri kana kuti muteveri anotarisa 10% yehupamhi hwepamusoro (kana kuti chero upi hwekusavhiringidza huri nani kupfuura 1%) nokuda kwehuwandu hwemasimba ayo huchibva - ndingangodaro ndakasununguka - kana, kana zvishoma, edza kuwana kuwedzera kujekeswa kubva kumugadziri asati atenga.
Zvinyorwa zvisiri izvo zvinoratidzwa nezwi THD (Total Harmonic Distortion) .
Signal-To-Noise Ratio (S / N)
Uyewo, chimwe chinhu chinowedzera mumagetsi anonzi Signal-To-Noise Ratio (S / N), iyo inokonzerwa nezwi kune ruzha rwenzira. Iyo yakawanda chiyero, kunyanya kudiwa kunzwika (mimhanzi, inzwi, zvinokonzerwa) zvakaparadzana kubva pamagetsi ekugadzirisa uye ruzha rwenzira. Muchidimbu chekugadzirisa, S / N zviyero zvinoratidzirwa mumagetsi. Nhamba yeS / N ye 70db inonyanya kukosha kudarika nhamba yeS / N ye 50db.
Dynamic Headroom
Pakupedzisira (nokuda kwezvinangwa zvekukurukurirana uku), asi kwete zvishoma (nenzira ipi zvayo), inyanzvi yewakagamuchira yako / amplifier kuti abudise simba pane imwe nguva yakakwirira zvikuru kwenguva pfupi kuti agadzire mapepa emimhanzi kana zvakanyanya kuitika mumavhidhiyo. Izvi zvinonyanya kukosha mumapurogiramu emitambo yemusha, apo kuchinja kwakanyanya muhurukuro uye kurira kunowanikwa munguva yefirimu. Izvi zvinotsanangurwa seDynamic Headroom .
Dynamic Headroom inotaridzwa mumagetsi. Kana munhu akagamuchira / amplifier ane simba rokuwedzera kaviri simba rinobudiswa kwenguva pfupi kuti agone mamiriro ezvinhu akarondedzerwa pamusoro apa, inenge iine Dynamic Headroom ye 3db.
The Bottom Line
Paunenge uchitenga kune anogamuchirwa / amplifier, ngwarira pamusoro pemvura yakashambadza uye inotora zvimwe zvezvinhu zvakadai se Total Harmonic Distortion (THD), Signal-To-Noise Ratio (S / N), Dynamic Headroom, uyewo maitiro uye kunzwisisika kwevatauri vamunoshandisa.
Anoplifier kana receiver, kunyange zvazvo centralpiece yako audio kana home theater system , zvimwe zvikamu zvakadai seVokutaurira, Zvimwe zvinopinza (CD, Turntable, Cassette, DVD, Blu-ray, etc.) zvinosanganiswawo mumaketani. Zvisinei, iwe unogona kuva nezvinhu zvakanakisisa zvinowanikwa, asi kana mupiki wako kana kuti chigadziridziro chisati chasvika kune basa racho, ruzivo rwako rwekuterera rucharwadzika.
Kunyange zvazvo tsanangudzo imwe neimwe inobatsira kumagumo ekugonesa kwemupiki kana kugadzirisa, zvakakosha kusimbisa kuti imwe chete, yakatorwa kubva mumamiriro ekutenderera nezvimwe zvinhu hazvikupi mufananidzo wakajeka wekuti imba yako yemitambo yemitambo ichaita sei.
Uyezve, kunyange zvazvo zvichikosha kunzwisisa izwi rinoshandiswa kwauri neAd kana kuti mutengesi, usarega kuti nhamba dzikuremere. Chisarudzo chekupedzisira chinofanira kushandiswa kuburikidza nekushandisa nzeve dzako, uye mune imwe nzvimbo yako.