Ungabeka i-Amplifier's Quality on Output Its Output
Into esemqoka ekhangayo kwi-intanethi nasephephandabeni Izikhangiso zamamukeli we-amplifiers, stereo, nasekhaya, yi-Watts-per-channel (WPC). Omunye umamukeli unama-Watts-Per-Channel angu-50 (WPC), enye inama-75, kanti enye inamakhulu angu-100. Ingabe ama-watts angcono kakhulu? Akudingekile.
Iningi labantu licabanga ukuthi ama-watts amaningi asho ivolumu engaphezulu. I-amplifier ene-100 WPC iphakamisa kabili njenge-WPC engu-50, akunjalo? Hhayi kahle.
Ukulinganiselwa Kwemandla Eqinisiwe Kungakhohlisa
Uma kuziwa ekukhipheni kwamandla okukhulisa kwangempela, ikakhulukazi abamukeli bezungezo zomsindo , okuningi kuxhomeke ekutheni ngobuqotho umakhi ukhetha ukulinganiswa kokukhipha amandla okukhetha ukukhuthaza. Uma ubona izikhangiso noma izimemezelo zomkhiqizo lapho umkhiqizi athi amandla okulinganisa, awukwazi ukuthatha lelo nani ngenani lomuntu. Udinga ukubheka ngokuningiliziwe kulokho umkhiqizi asekela khona izitatimende zabo.
Isibonelo, kulabo abamukelayo emidlalo yaseshashalazini abanesimiso sesiteshi esingu-5.1 noma se-7.1 , isichasiselo esivezwayo sokukhipha amanzi esinqunywe lapho i-amplifier ishayela khona iziteshi ezimbili noma ezimbili ngesikhathi esisodwa, noma isichazamazwi esinqunywe yi-amplifier uma zonke iziteshi zikhona iqhutshwa ngesikhathi esisodwa? Ngaphezu kwalokho, ingabe isilinganiso senziwe ngokusebenzisa ithoni yokuhlola ye- 1 kHz, noma ngama-toni wokuhlola angu-20Hz kuya ku-20KHz ?
Ngamanye amazwi, uma ubona ukulinganiswa kwe-amplifier ye-wattage ye-watts 100-ngomzila ngamunye ku-1 kHz (okubhekwa njenge-standard standard-frequency reference) ngomzila owodwa oqhutshwayo, ukukhishwa kwamandla emhlaba wangempela uma zonke iziteshi ezingu-5 noma ezingu-7 zikhona ukusebenza ngesikhathi esifanayo kuwo wonke ama-frequencies kuyoba phansi, mhlawumbe okungenani 30 noma 40% ephansi. Isibonisi esingcono ukusekela isilinganiso uma iziteshi ezimbili ziqhutshwa, futhi, esikhundleni sokusebenzisa ithoni ye-1kHz kuphela, sebenzisa ama-20kz angu-20kHz amathoni, okumele uzwela olubanzi kunazo zonke ububanzi obunokuba umuntu abe nalo. Kodwa-ke, lokho okwamanje akucabangi ngokugcwele amandla okukhulisa amandla okukhulisa amandla lapho zonke iziteshi ziqhutshwa.
Ngakolunye uhlangothi, akuzona zonke iziteshi ezidinga amandla afanayo ngesikhathi esifanayo njengoba ukuhluka kokuqukethwe komsindo kuthinta izidingo zesiteshi ngasinye kunoma yisiphi isikhathi esithile. Isibonelo, i-soundtrack ye-movie izoba nezigaba lapho kuphela iziteshi zangaphambili ezingadingeka ukuze kukhishwe amandla, kodwa iziteshi ezungezile zingase zikhiphe umsindo ophansi ozwakalayo. Ngendlela efanayo, iziteshi ezungezile zingabizwa ukuba zikhiphe amandla amaningi ngokuqhuma noma ukuphazamiseka, kodwa iziteshi zangaphambili zingase zigcizelelwe ngesikhathi esifanayo.
Ngokususelwa kulezo zimo, ukulinganiswa kokucaciswa kwamandla okwenziwe ngomongo kuyasebenza nakakhulu ezimweni zangempela zomhlaba. Isibonelo esisodwa singaba yi-watts angu-80 ngomzila ngamunye, esilinganiselwe kusuka ku-20Hz kuya ku-20kHz, ukuqhutshwa kweziteshi ezimbili, ama-oh ohms, .09% THD.
Lokho konke okushoyo ukuthi i-amplifier (noma i-receiver yemidlalo yaseshashalazini) ikhono lokukhipha ama-80-WPC (okungaphezu kokwanele kwendawo yokulala yesayizi), usebenzisa amathoni wokuhlola phezu kwezinga lonke lokuzwa kwabantu, lapho iziteshi ezimbili zisebenza ngezikhulumi ezijwayelekile ze-8-ohm . Futhi kufakwe ukuphawula ukuthi ukuphazamiseka okubangelwa (okubhekiswe ku-THD noma ukuphazamiseka kokuphelele kwe-harmonic) kuphela .09% - okumelela ukukhishwa kwezwi elihlanzekile kakhulu (ngaphezulu kwe-THD kamuva kulesi sihloko).
Amandla aqhubekayo
Isici esengeziwe okufanele sicatshangelwe yikhono lomamukeli noma amplifier ukukhipha amandla ayo agcwele ngokuqhubekayo. Ngamanye amazwi, ngenxa yokuthi umamukeli / amplifier wakho angabalwa njengokwazi ukukhipha 100 WPC, akusho ukuthi kungenza njalo kunoma yimuphi ubude obalulekile obude. Qinisekisa ukuthi uma uhlola imininingwane, ukuthi ukukhishwa kwe-WPC kulinganiswa kumigomo ye-RMS noma ye-FTC, hhayi amagama afana ne-Peak Power noma i-Maximum Power.
I-Decibels
Amazinga omsindo alinganiswa ku-Decibels (dB) . Izindlebe zethu zibona ukungezwani kwezinga levolumu ngendlela ehlukile. Izinzwa zizwela kancane umsindo njengoba zanda. I-Decibel iyisilinganiso se-logarithmic sokuphakama okuhambisanayo. Uhlobo olungaba ngu-1 dB okungenani ushintsho oluzwakalayo emthamo, 3 dB ishintsho esilinganiselwe ngevolumu, kanti cishe i-dB eyi-10 yi-double doubling of the doubling volume.
Ukukunika umbono wokuthi lokhu kuhlobana kanjani nezimo zezwe langempela izibonelo ezilandelayo zifakwe ohlwini:
- 0 dB iyinsika yokuzwa
- I-Whisper: 15-25 dB
- Umsindo wangemuva: cishe 35 dB
- Ikhaya elijwayelekile noma indawo ehhovisi: 40-60 dB
- Izwi elivamile lokukhuluma: 65-70 dB
- Isiphetho se-orchestral: 105 dB
- Umculo womculo we-Rock: 120 dB +
- I-Threshold yobuhlungu: 130 dB
- Izindiza ze-Jet: 140-180 dB
Ukuze i-amplifier eyodwa ikhiqize umsindo ngokuzwakalayo kabili njengenye kwenye ama-decibel, udinga izikhathi eziphindwe izikhathi ezingu-10 zokukhishwa kwe-wattage. I-amplifier elinganiswe ku-100 WPC inamandla okuphindwe kabili ngezinga le-10 WPC amp, i-amplifier elinganiswe ku-100 WPC idinga ukuba i-WPC ayi-1,000 ibe kabili ngokuzwakalayo. Ngamanye amazwi, ukuhlobana phakathi kwevolumu kanye nokukhipha umthamo kuwu-logarithmic kune-linear.
Ukuphazamiseka
Ngaphezu kwalokho, ikhwalithi ye-amplifier ayibonakali nje ekuphumeni kwe-wattage nokuthi izuza kangakanani. I-amplifier ebonisa umsindo owedlulele noma ukuphazamiseka emazingeni wezwi lamandla angenakuhlulwa. Ungcono kakhulu nge-amplifier ye-WPC engaba ngu-50 ngezinga eliphansi lokuphazamiseka okukhulisa okunamandla okunamandla amaningi anezinga eliphezulu lokuphazamisa.
Noma kunjalo, uma uqhathanisa izilinganiso zokuphazamisa phakathi kwamaphutha noma abamukelayo yaseshashalazini ekhaya - izinto zingaba "zingufu" - njengoba ungase uqaphele, ku-spec sheet yayo, ukuthi i-amplifier noma i-receiver A ingase ibe nokulinganisa okushiwo okungu-.01% kuma-watts angu-100 okukhipha , ngenkathi i-amplifier noma isamukeli B ingaba nesilinganiso sokuphazamisa ohlwini se-1% ku-150 Watts yomkhiqizo.
Ungase ucabange ukuthi i-amplifier / i-receiver A ingase ibe umamukeli ongcono - kodwa kufanele ucabange ukuthi ukulinganisa ukuphazamiseka kwalabo abamukeli ababili akukhulunywanga ngokukhipha okufanayo kwamandla. Kungenzeka ukuthi bobabili abamukeli bangase babe nezilinganiso ezifanayo (noma ezivaliwe) zokuphazamiseka lapho zombili ziqhuba ngokukhipha okungu-100 watts, noma uma isamukeli A siqhutshwa ukuba siphume ama-watts angu-150, kungenzeka ukuthi sibe nokulinganisa okufanayo (noma okubi kakhulu) ukuphazamiseka okufanayo njengeReceiver B .
Ngakolunye uhlangothi, uma isikhuliseli sinesilinganiso sokuphazamisa sika-1% kuma-watts angu-100 kanti esinye sinokulinganiswa kokuphazamisa kuphela .01% kuma-watts angu-100, ngakho-ke kusobala ukuthi i-amplifier noma umamukeli onokulinganisa okungu -01%. uyisamukeli esingcono, okungenani ngokuqondene naleso sisho.
Njengesibonelo sokugcina, uma uhamba nge-amplifier noma umamukeli onokulinganiswa okuphazamisayo okushiwo ngu-10% kuma-watts angu-100, angeke ahluleke ukulinganisa lelozinga lokukhipha amandla - kungenzeka ukuthi lilaleleke, ngokuphazamiseka okuncane, izinga eliphansi lokukhipha amandla. Kodwa-ke, uma ugijima kunoma yiliphi i-amplifier noma umamukeli obala izinga le-distortion elingu-10 (noma noma yiliphi izinga lokuphazamisa eliphakeme kune-1%) okushiwo amandla okushiwo - ngingahle ngiyeke - noma okungenani, zama ukuthola ukucaciswa okwengeziwe kusuka kumenzi ngaphambi kokuthenga.
Izimpawu zokuhlanekezela zichazwe yi-THD (Ukuhlukumeza Okuphelele KwamaHarmonic) .
Ukulinganisa Okumangalisa Kumsindo (S / N)
Futhi, esinye isici esimeni se-amplifier yi- Signal-To-Noise Ratio (S / N), okuyisilinganiso sokuzwakala kumsindo wangemuva. I-wider ratio, ngaphezulu imisindo efiselekayo (umculo, izwi, imiphumela) ihlukaniswe nemiphumela ye-acoustical nomsindo wangemuva. Ngenkcazelo ye-amplifier, izilinganiso ze-S / N zichazwe kuma-decibel. Isilinganiso se-S / N se-70db sinesifiso esihle kakhulu kunezinga le-S / N le-50db.
Inhloko Eyinhloko
Okokugcina (ngenhloso yale ngxoxo), kodwa hhayi okungenani (nganoma iyiphi indlela), ikhono lomemukeli wakho / amplifier ukukhipha amandla ezingeni eliphakeme kakhulu ngezikhathi ezincane ukubhekana nezintaba zomculo noma imiphumela emibi kakhulu emabhayisikobho. Lokhu kubaluleke kakhulu ekusetshenzisweni kwezemidlalo yasendlini, lapho izinguquko ezidlulele kwivolumu nokuzwakalayo kwenzeka ngesikhathi sefilimu. Lesi sichazo siboniswa njengeDynamic Headroom .
Inhloko Ekhanda Dynamic ilinganiswa ngama-decibel. Uma umamukeli / amplifier enamandla okuphinda kabili amandla okukhipha okwesikhashana ukuze ahambisane nemibandela echazwe ngenhla, izoba nenhloko ye-Dynamic ye-3db.
Okubalulekile
Uma uthenga nge-receiver / amplifier, qaphela ukucaciswa kwemithombo ye-wattage futhi uthathe isitoreji sezinye izici ezifana ne-Total Harmonic Distortion (THD), Ukusabalalisa Ukusabalalisa (S / N), I-Dynamic Headroom, kanye nokusebenza kahle ukuzwela kwezikhulumi ozisebenzisayo.
I-amplifier noma i-receiver, nakuba i-centerpiece isistimu yakho yomsindo noma yaseshashalazini yasendlini , ezinye izingxenye ezifana nama-Loudspeakers, amadivayisi wokufaka (CD, Turntable, Cassette, DVD, Blu-ray njll ...) nazo zixhunywe kulayini. Noma kunjalo, ungaba nezinsimbi ezingcono kakhulu ezitholakalayo, kodwa uma umamukeli wakho noma amplifier engekho emsebenzini, isipiliyoni sakho sokulalela sizohlupheka nakanjani.
Nakuba ukucaciswa okukodwa kunomthelela ekusebenzeni okuphelele komamukeli noma amplifier, kubalulekile ukugcizelela ukuthi i-spec eyodwa, ethathwe ngaphandle komongo nezinye izici akunikezi isithombe esinembile ukuthi uhlelo lwakho lwezemidlalo yasendlini luzokwenza kanjani.
Futhi, nakuba kubalulekile ukuqonda igama elisetshenziswe kuwe yi-Ad noma umninimthengisi, ungavumeli izinombolo zingaphezu kwakho. Isinqumo sokugcina kufanele sisekelwe esebenzisa izindlebe zakho, nasendlini yakho.