Kuba phantse zonke izithethi okanye isethi yentloko ye-headphones ongayithengayo, uya kufumana i-impedance echazwe kwi-ohms (efanekiselwa njenge-Ω). Kodwa iipakethe okanye ezibandakanyiweyo zeemveliso zivame ukuba zichaze ukuba yintoni impedance kuthetha okanye kutheni kubalulekile!
Ngethamsanqa, impedance ifana ne rock'n'roll enkulu. Ukuzama ukuqonda yonke into malunga nokuba yinto ingaba nzima, kodwa enye ayifuni ukuqonda yonke into malunga nayo "ukuyenza". Enyanisweni, ingqiqo ye-impedance yinto elula ukuyiqonda. Ngoko funda ukufumanisa oko kufuneka ukukwazi ngaphandle kokuziva ngathi uthatha izifundo zezinga lokuphumelela kwi-MIT.
I & # 39; s Like Water
Xa uthetha ngezinto ezinjengama watts kunye nombane kunye negunya , abaninzi abalobi bomsindo basebenzisa ukufaniswa kwamanzi ehamba ngebhola. Ngoba? Kungenxa yokuba lifanekisa kakhulu abantu abanokuzibona ngolu hlobo kwaye baxhamle!
Cinga ngesithethi njengombhobho. Cinga ngesignali somsindo (okanye, ukuba ukhetha, umculo) njengamanzi ahamba ngepayipi. Umkhulu umbhobho, ngokulula amanzi angaphumelela kuwo. Iipayipi ezinkulu zinokusingatha nokuvakala kwamanzi amaninzi. Ngoko isithethi esinemiphefumlo esezantsi ifana nombhobho omkhulu; ivumela uphawu olungaphezulu kombane kwaye luvumela ukuba luqhume lula.
Ezi zikhulu ziyakubonwa njengezilinganisi zokuhambisa i-watts eziyi-100 kwi-8 ohms impedance, okanye mhlawumbi i-150 okanye i-200 watts kwi-4 ohms impedance. I-downed impedance, umbane ogqithiseleyo (uphawu / umculo) ugeleza kwisithethi.
Ngaba oko kuthetha ukuba umntu kufuneka athenge isithethi nge-impedance ephantsi? Akunjalo, kuba ezininzi izikhulisi aziklanyelwe ukusebenza kunye nezi-4-ohm iintetho. Cinga kwakhona kwipayipi ephethe amanzi. Ungayifaka ipayipi enkulu, kodwa iya kuqhuba kuphela amanzi xa unompu onamandla okwaneleyo ukubonelela konke ukugeleza kwamanzi.
Ngaba ukunyanzeleka okuphantsi kuthetha umgangatho ophezulu?
Thatha phantse nayiphi na isithethi eyenziwe namhlanje, sidibanise phantse nayiphi na i- amplifier eyenziwe namhlanje, kwaye uya kufumana umthamo okwaneleyo kwigumbi lakho lokuhlala. Ngoko yintoni inzuzo, uthi, isithethi se-4-ohm ngokubhekiselele kwisikhulumi se-8-ohm? Akukho, ngokwenene, ngaphandle kweyodwa; i-impedance ephantsi ngamanye amaxesha ibonisa inani lokucwangcisa kakuhle iinjineli xa zenze i sithethi.
Okokuqala, imvelaphi encinane. Impedance yesithethi ishintsha njengoko isandi sikhuphuka siphantsi kwi-pitch (okanye i-frequency). Ngokomzekelo, kwi-41 Hz (inqaku eliphantsi kunazo zonke kwi-bass guitar standard), impedance yesithethi ingaba ngu-10 ohms. Kodwa kwi-2,000 Hz (ukungena kwi-top uhla lwe-violin), impedance ingaba yi-3 ohms kuphela. Okanye unokutshintshwa. Ingcaciso yempedance ebonwe kwisithethi ingumyinge onzima. Indlela i-impedance yezivakalisi ezintathu ezahlukileyo ezitshintsha ngayo ngokubhekiselele kwisantya sesandi singabonwa kwitshathi ephezulu kule nqaku.
Ezinye zezona zineenjineli zithethi ezichanekileyo zifana nokukhupha i-impedance yeentetho ngesandi esivumelanayo ngakumbi kulo lonke uluhlu lwamazwi. Njengokuba umntu enokuthi atyekele ingqayi yomthi ukuze asuse iinqwelo eziphakamileyo zeengqolowa, ingunjineli yesithethi ingasebenzisa isiphaluka zombane ukuze idibanise imimandla ye-impedance ephezulu. Yingakho iintetho ze-4-ohm ziqhelekileyo kwi-audio-end-audio, kodwa ezingavumelekanga kwi-market-market market.
Ngaba I-System Yakho Ingayiphatha?
Xa ukhetha isithethi se-4-ohm, qiniseka ukuba i-amplifier okanye i-receiver iyakwenza. Unokwazi njani umntu? Maxa wambi akucaci. Kodwa ukuba umenzi wokukhulisa / owamkelayo upapasha ukulinganiswa kwamandla kwii-8 no- 4 ohms, ukhuselekile. Amanqaku ahlukeneyo ahlukeneyo (oko kukuthi, ngaphandle kwe-preamp okanye kwi-tuner eyakhelwe ngaphakathi) angakwazi ukusingatha izikhulumi ze-4-ohm, njengokuba kunokwenzeka nayiphi i -receiver ye-$ 1,300 kunye ne-A / V.
Kodwa ndiza kukhwankqisa ukubamba iintetho ezine-ohm ezine- 399 A / V okanye i- receiver ye-$ 150. Kungenzeka ukuba kulungile kwivolumu ephantsi, kodwa i-crank it up and pump (amplifier) kungenzeka ukuba ingenalo igunya lokunyusa umbhobho omkhulu (isithethi). Iimeko ezilungileyo, ummkeli uya kuzivala okwesikhashana. Eyona nto inzima kakhulu, uya kutshisa abafumanayo ngokukhawuleza kunokuba umqhubi we-NASCAR ugqoke iinjinjini.
Ukuthetha ngeemoto, enye inqaku lokugqibela: Kwi-audio audio, izikhulumi ze-4-ohm ziqhelekileyo. Kungenxa yokuba iinkqubo zomsindo weemoto ziqhutywa kwi-12 volt DC endaweni ye-AC volt 120. Impedance ye-4-ohm ivumela izithethi zomsindo wezithuthi ukuba zitshintshe amandla amaninzi kwi-audio-amp audio volume amp. Kodwa ungakhathazeki: Iimoto zomsindo weemoto zenzelwe ukusetyenziswa kunye neentetho eziphantsi kwempedance. Ngaloo nto utyumle kwaye ujabulele! Kodwa nceda, kungekhona kwindawo yam.