01 ngo-04
I-woofer engu-24 intshi + 1,800 ama-watts = ???
Njengoba ngangiyithanda enye yama-subwoofers angu-18 ka-Pro Audio Technology ngesikhathi sokuvakashela inkampani cishe ngonyaka odlule, umsunguli wenkampani uPaul Hales wamangala lapho engitshela indlela engangiyibheke ngayo kwakungesiyona inkampani enkulu kunazo zonke kwenza. "Sinesinye somshayeli wamasentimitha angu-24, ngokufaka izakhiwo ezinkulu ngempela," esho. Ngifaka sengathi kungenzeka ukuthi yi-subwoofer enamandla kunazo zonke engake ngibhekana nazo, ngabuza ngokushesha uHales ukuthi ngingabuya yini ukugijima ukulinganisa i-CEA-2010 inani eliphakeme lokukhipha okuyingxenye ye-24-intshi ye-model model ye-model LFC-24SM, isisindo esingaphezu kwamakhilogremu angu-300 , intengo nge $ 10,000 - ngesikhathi esilandelayo esesinye.
Ekugcineni ngathola ithuba lami namuhla. Ngacabanga ukuthi kuzoba lula kimi ukuthi ngenze idrayivu esuka ekhaya lami enyakatho yeLos Angeles kuya eHQ ye-Pro Audio Technology e-Lake Forest, e-Calif., Kunokuba ithumele i-subwoofer. Ngakho ngiphakamisa yonke imishini yami yokulinganisa, kuhlanganise ne-subwoofer yami yesilinganiso esilinganiselwe ngamasentimitha angu-15, futhi ngiwela phansi eningizimu ye-Orange County.
02 ka 04
I-Pro Audio Technology LFC-24SM: I-Backstory
Ngesikhathi ngisungula izilinganiso, ngabuza uHales ukuthi inkampani yakhe yenza i-subwoofer enkulu kangaka, nokuthi yenzani nayo.
"Kungenxa yokufakwa kwethempeli elikhulu, futhi abantu abafuna ukuhlanza kakhulu," kusho yena. "Okwamanje sibeka ababili kubo emidlalo yaseshashalazini efana ne-movie encane yezohwebo, enehlalo yezemidlalo yabantu abangaba ngu-80. Ngokufanele ubeke lezi zimbalwa ngaphambili futhi ezimbalwa ze-subs ezincane ngemuva ukubhebhethekisa impendulo ye-bass ekamelweni. "
I-LFC-24SM isebenzisa umshayeli oyedwa ongamamitha angu-24 kwikhabhinethi ephethe i-quad. I-Hales yenzelwe ukuthi isebenze nama-amplifiers enkampanini yakhe, ene-digital processing processing (DSP) eyakhelwe ngaphakathi ukuze ithole impendulo. "Lowo esisisebenzisayo namuhla ungomunye omusha, umdwebo obeka ama-watts angu-6,000 kuma-2 ohms," esho. "Umshayeli kule ngxenye ngu-8 ohms, ngakho-ke sithola cishe ama-watts angu-1,800 ngaphandle kwe-amp."
Abathandi be-Subwoofer bangase bamangale lapho bezwa ukuthi naphezu kobukhulu bayo, i-LFC-24SM inempendulo encane ngaphansi kwe-20 Hz. Kungani ungasebenzisi umshayeli omkhulu ukuze athole impendulo engezansi? "Inhloso yethu yokuklama ukukhiqiza i- LFE [i-low-frequency effect] band njengoba kungenakwenzeka," kusho uHales. "Sinesihlungi esiphezulu se-subsonic esinciphisa isignali ngezansi kwemvamisa ye-boxing tuning, engaba ngu-22 Hz. Lokho kunciphisa ukuhlanekezela nokuvikela umshayeli.
"Ingxenye yesizathu salesi sigaba sinomphumela ophezulu wokuthi ukuzwela komshayeli kungu-99 dB ku-1 watt / 1 imitha. Awukwazi ukwenza umshayeli oya ku-8 Hz futhi unokuzwela okuhle nokuthembeka. "
03 ka 04
I-Pro Audio Technology LFC-24SM: Umsindo
Ngempela, ngimangalisa njengoba ngigijima izilinganiso ukuze ngibone ukuthi kusukela emgwaqeni wami ophephile ngamamitha angaba ngu-20, umshayeli we-LFC-24SM ubonakala sengathi uhamba kuze kube yilapho ngifika ngaphansi kwe-20 Hz, imvamisa ephansi kakhulu. Nginingi le-subs Ngilinganisela, ngibona kalula umshayeli ehamba ngisho kusuka ezinyaweni ezingu-20.
Okwangimangalisa nami ukuthi i-LFC-24SM ihlanzekile kanjani ngenkathi ngenza izilinganiso. Iningi le-subwoofers engilinganiselayo lizwakala sengathi lizozihlukanisa ngenkathi lifinyelela ezingeni eliphezulu ngokwanele ukushaya enye yezingqikithi eziphambene kakhulu ze-CEA-2010. I-LFC-24SM izwakala ngokucacile, echazwe kahle futhi engaphenduliwe cishe sonke iseshini yokulinganisa, kuphela ukuqala ukuzwakala i-tad ifinyeleleke lapho ngiphansi kwe-20 Hz. Ngokuvamile, i-harmonic kuphela ephazamisayo eyaphule umbandela wokuphazamisa we-CEA-2010 yayiyi-harmonic yesithathu; kukhona ithuba elihle lokuthi kwakuyi-amp, hhayi umshayeli, ofinyelela emikhawulweni yayo.
(Ingabe ngithola ubuchwephesha kakhulu ngalokhu? Funda i-primer yami ye-CEA-2010 ukuze ufunde kabanzi ngalolu hlelo lokuthakazelisa nokubalulekile.)
Ngakho ngaphandle kokuqhubeka kwe-ado, nansi izilinganiso ...
04 ka 04
I-Pro Audio Technology LFC-24SM: Izindlela
I-CEA-2010A yendabuko
(Ukuphakama okungu-1M) (i-2M RMS)
40-63 Hz avg 135.5 dB 126.5 dB
63 Hz 135.2 dB 126.2 dB
50 Hz 136.0 dB 127.0 dB
40 Hz 135.4 dB 126.4 dB
20-31.5 Hz avg 130.5 dB 121.5 dB
31.5 Hz 133.6 dB 124.6 dB
25 Hz 131.4 dB 122.4 dB
20 Hz 123.7 dB 114.7 dB
Ngenza izilinganiso ze-CEA-2010 ngisebenzisa imakrofoni yokulinganisa i-Earthworks M30, i-M-Audio Mobile Pre USB kanye nesofthiwe ye-freeware ye-CEA-2010 eyenziwe nguDon Keele, okuyisimiso esisebenza kwi-package ye-software ye-Wavemetrics Igor Pro yesayensi. Ngalinganisa izilinganiso zami ekuphenduleni indawo yokugcina impahla ye-Pro Audio Technology ngokuqala ukulinganisa isithenjwa sami samasentimitha angu-15 esikhaleni, ngokuqhathanisa nesilinganiso esilinganisweni engangithatha epaki ngamagunya angu-50 kuzo zonke izinhlangothi, bese ngikhipha isitoreji ukulinganisa kusuka kwesilinganiso sepaki ukwakha ijika lokulungisa.
Lezi zilinganiso zithathwe emkhatsini wezingu-3 wamaphesenti angu-9, bese zilinganiselwa ku-1-mitha elinganayo ngokwezimfuneko zokubika ze-CEA-2010A. Izilinganiso ezimbili zezilinganiso ezinikezwe - i-CEA-2010A kanye nemikhuba yendabuko - zifana, kodwa ukulinganisa kwendabuko (okuyiwona amawebhusayithi amaningi alalelwayo nabakhiqizi abaningi abasebenzisa) kubika imiphumela emlinganisweni we-RMS wamamitha angu-2, okungukuthi -9 dB ngaphansi Umbiko we-CEA-2010A. Amaphesenti abalwa kuma-pascals.
Ukubeka ukusebenza kwe-LFC-24SM ngendlela enombono, insizakalo enamandla kunazo zonke engikwazi ukuyikhumbula kuze kube yimanje yi-SVS PC13-Ultra. Ngomgomo we-CEA-2010A wokubika, i-PC13-Ultra engu-125.8 dB kusuka ku-40 kuya ku-63 Hz no-116.9 dB kusuka ku-20 kuya ku-31.5 Hz, futhi inikeza u-114.6 dB ku-20 Hz. Ngakho, inzuzo ye-LFC-24SM ingu +9.7 dB isilinganiso kusuka ku-40 kuya ku-63 Hz, +13.6 dB kusuka ku-20 kuya ku-31.5 Hz, no-+9.1 dB ku-20 Hz. Yiqiniso, i-PC13-Ultra ibiza u-$ 1,699 futhi ingxenyana yobukhulu be-LFC-24SM.
UHales naye wenza isheke esisheshayo ngemitha yakhe ye-SPL (ebonwe ngenhla). Wangicela ukuba ngigijime umswakama we-60 Hz, bese ngenza isilinganiso kumamitha ayi-1 kulokho ayekubheke njengezinga eliphezulu kakhulu eliphephile. Ungabona umphumela ngenhla. Lokhu kunethoni eqhubekayo; I-CEA-2010 inikeza izinombolo eziphakeme ngoba isebenzisa amathoni angama-6.5 ajikelezayo asondelene nemvelo yezinto ezingezansi zomculo nama-movie wangempela.
Ngicabanga ukuthi kungase kube khona ama-subwoofers anamandla kakhulu lapho-ngibone isithombe somsindo ophilayo bukhoma Bob Heil eduze kwesigidi samasentimitha angu-36 kanyekanye, futhi ngake ngakhubeka esitokisini esitolo se-Vancouver, BC esikhulumi , njengoba ngiyakhumbula, ezimbili ze-JBL 18-inch pro woofers ziphonsela i-radiator yangaphambili ye-radiator endaweni efihliwe isobarik. Kodwa ngandlela-thile, ngicabanga ukuthi akunakwenzeka ukuthi ngizoke ngilinganise izinombolo ze-CEA-2010 njengoba ngifinyelele ku-LFC-24SM. Manje ngidinga ukuthi ngithole indlela yokulinganisa le nto ekamelweni lami lokulalela. Mhlawumbe uma ngilahla umbhede ....