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Wofiira wa masentimita 24 + 1,800 watts = ???
Pamene ndinali kuyamikira limodzi la mafilimu a 18-inch Pro Audio Technology paulendo ku kampani chaka chapitacho, katswiri wa kampani dzina lake Paul Hales anandidabwitsa pamene anandiuza chitsanzo chomwe ndinali kuyang'ana sichinali chachikulu pa kampaniyo amapanga. "Tilinso ndi dalaivala 24-inch, pazitsulo zazikulu," adatero. Kuwona kuti ndikhoza kukhala ndi subwoofer yamphamvu kwambiri yomwe ndakhala ndikukumana nayo, nthawi yomweyo ndinapempha Hales ngati ndingabwerere kuti ndiyambe kuthamanga CEA-2010 kuchuluka kwa chiwerengero cha chiwerengero chimodzi cha 24-inch subs-model number LFC-24SM, kulemera kwake kuposa mapaundi 300 , mtengo wa $ 10,000 - nthawi yotsatira yomwe anali nayo.
Ine potsiriza ndinapeza mwayi wanga lero. Ndinaganiza kuti zikanakhala zophweka kuti ndipange galimoto kuchokera ku nyumba yanga kumpoto kwa Los Angeles kupita ku HQ ya Pro Audio Technology ku Lake Forest, Calif., Kusiyana ndi kutumiza subwoofer. Kotero ine ndinanyamula zida zanga zonse, kuphatikizapo ndondomeko yanga yowonongeka yokhala ndi mikono inchi yokwana 15, ndikupita kumusi kwa Southern Orange County.
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Pro Audio Technology LFC-24SM: Kubwerera Kumbuyo
Pamene ndinali kuyimilira, ndinamufunsa Hales chifukwa chake kampani yake imapanga subwoofer yaikulu, ndi zomwe amachita nazo.
"Ndizo malo akuluakulu a nyumba, ndipo anthu omwe akufuna kukhala oyera kwambiri, mokweza," adayankha. "Pakalipano tikuika awiriwa ku nyumba yosungiramo nyumba yomwe ili ngati cinema yaing'ono yamalonda, ndi malo okhala ndi masewera okwana 80. Momwemo mumayika patsogolo pang'onopang'ono ndi makina ang'onoang'ono kutsogolo kuti muthe kuyang'ana pansi. "
LFC-24SM imagwiritsa ntchito dalaivala imodzi yokwana 24 mu komiti ya quad-ported. Hales anachikonza kuti agwire ntchito ndi amplifiers a kampani yake, omwe ali ndi mawotchi ochuluka kwambiri ogwiritsira ntchito digito (DSP) omwe amamangidwira kuti ayankhidwe. "Amene tikugwiritsira ntchito lero ndi atsopano, zomwe zimatulutsa 6,000 watts mu 2 ohms," adatero. "Dalaivala mu gawo ili ndi 8 ohms, kotero ife tikupeza pafupifupi 1,800 Watts pa amp."
Anthu okonda masewerawa angadabwe kumva kuti ngakhale kuti ukulu wake uli waukulu, LFC-24SM ilibe kanthu kakang'ono pansi pa Hz 20. Bwanji osagwiritsa ntchito dalaivala wamkulu kuti mutenge yankho lachangu? "Cholinga chathu chinali kubzala LFE [low-frequency effects] gulu mosavuta," Hales anafotokoza. "Tili ndi fyuluta yowonongeka kwambiri yomwe imachepetsa chizindikiro chomwe chili pansipa pafupipafupi, yomwe ili pafupi 22 Hz. Izi zimachepetsa kupotoza ndi kuteteza dalaivala.
"Chifukwa china chomwe chigawochi chimakhala nacho chokwanira ndichoti dalaivala ndi 99 dB pa 1 Watt / mita imodzi. Simungathe kupanga dalaivala yomwe imapita ku 8 Hz ndipo imakhala yotetezeka komanso yodalirika. "
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Pro Audio Technology LFC-24SM: Kumveka
Inde, ndinadabwa pamene ndikuyendetsa kuti ndikuyang'ane kutali ndi mtunda wa makilomita 20 kutalika, dalaivala wa LFC-24SM inkaoneka ngati ikuyenda mpaka nditafika pa Hz 20, nthawi yochepa kwambiri. Ndili ndi mavitamini ambiri, ndimatha kuona dalaivala akusuntha ngakhale kuchokera pa mapazi makumi awiri.
Chimene chinandidodometsanso ine ndi momwe LFC-24SM imayeretsera pamene ndinali kuchita zoyezera. Zambiri za subwoofers zomwe ndimayesera zimamveka ngati zatsala pang'ono kudzipasula pokhapokha akafika pamtunda wokwanira kuti afike pamtunda umodzi wa zovuta za CEA-2010. LFC-24SM inafotokozera molondola, momveka bwino komanso yosasinthika m'kati mwa gawo lonse la kuyesa, ndikuyamba kuyimba tad pamene ndikufika pa Hz 20. Kawirikawiri, harmonic yokhayo yolekanitsa yomwe inaphwanya mbali ya CEA-2010 inali ya harmonic yachitatu; Pali mwayi wabwino kuti amphamvu, osati dalaivala, ifika pamalire ake.
(Kodi ndikukhala ndi luso lothandizira izi? Werengani reader yanga CEA-2010 kuti mudziwe zambiri za njira yochititsa chidwiyi ndi yofunika kwambiri.)
Kotero popanda zoonjezera, apa pali miyeso ...
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Pro Audio Technology LFC-24SM: Mapangidwe
CEA-2010A Traditional
(1M pic) (2M RMS)
40-63 Hz tsamba 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
Ndinachita zochitika za CEA-2010 pogwiritsa ntchito maikolofoni ofunika a Earthworks M30, M-Audio Mobile Pre USB mawonekedwe ndi software ya freeware CEA-2010 yomwe inayambitsidwa ndi Don Keele, yomwe ndi chizoloŵezi chomwe chimayendera pulogalamu ya sayansi ya Wavemetrics Igor Pro. Ndinayeza miyeso yanga poyang'anira nyumba yosungirako zinthu za Pro Audio Technology poyesa kufotokoza momwe ndingagwiritsire ntchito masentimita makumi asanu ndi awiri (15-inch), ndikuyerekeza chiyesocho ndi chiyeso chomwe ndinatenga pakiyi ndi malo okwana 50 mbali zonse, ndikuchotsa nyumba yosungiramo katundu kuchuluka kwa kuyeza kwa paki kuti apange mpangidwe wokonzera.
Miyeso imeneyi inatengedwa pa 3 mamita pamwamba pa chiwerengero, kenako kufika pa 1 mita imodzi yofanana ndi zofunikira za ECA-2010A. Maselo awiri ofunika - CEA-2010A ndi njira za chikhalidwe - ndizofanana, koma miyambo yapamwamba (yomwe mawebusaiti ambiri ndi ojambula ambiri amagwiritsira ntchito) zimakhala zotsatira pamtundu wofanana wa mamita awiri a RMS, omwe ndi 9 ochepa kuposa Lipoti la CEA-2010A. Mawoti amawerengedwa mu pascals.
Kuyika machitidwe a LFC-24SM mwachindunji, gawo lopambana kwambiri ndikulikumbukira kufikira lero ndi SVS PC13-Ultra. Malingana ndi malamulo a CEA-2010A, PC13-Ultra ya 125.8 dB kuchokera 40 mpaka 63 Hz ndi 116.9 dB kuchokera 20 mpaka 31.5 Hz, ndipo amapereka 114.6 dB pa 20 Hz. Choncho, kupindula kwa LFC-24SM ndi +9.7 dB pafupifupi 40 mpaka 63 Hz, +13.6 dB kuchokera 20 mpaka 31.5 Hz, ndi +9.1 dB pa 20 Hz. Inde, PC13-Ultra imadola $ 1,699 ndipo ndi gawo limodzi la kukula kwa LFC-24SM.
Hales nayenso anafufuza mwamsanga ndi mita yake SPL (tawonera pamwamba). Anandipempha kuti ndiyambe kuyendetsa mafunde a 60 Hz, ndipo ndinayesa pa mita imodzi pa zomwe ankaganiza kuti ndipamwamba kwambiri. Mukhoza kuona zotsatirapo pamwambapa. Izi zili ndi mawu opitilira; CEA-2010 imapereka chiwerengero chapamwamba chifukwa chimagwiritsa ntchito zizindikiro zapakati pa 6.5 zomwe ziri pafupi ndi chikhalidwe cha zinthu zomwe zili ndi nyimbo ndi mafilimu enieni.
Ndikulingalira kuti pangakhale zowonjezera zowonjezera zoposa pamenepo - Ndakhala ndikuwona chithunzi cha Bob Heil phokoso labwino kwambiri pafupi ndi masentimita 36 kamodzi kamodzi, ndipo kamodzi ndinapunthwa pamagulu a Vancouver, BC omwe anakonza , monga ndimakumbukira, maulendo awiri a JBL 18-inch pro pushing radiator kutsogolo kwa 30 mm isobarik. Koma mwa njira ina, ndikuganiza kuti ndizosatheka kuti ndiyese ndondomeko ya CEA-2010 monga momwe ndinakhalira kuchokera ku LFC-24SM. Tsopano ndikungofunika kudziwa momwe ndingagwirizane ndi chinthu ichi mu chipinda changa chomvetsera. Mwinamwake ndikachotsa mphasa ...