01 ye 04
A woofer 24-inch + 1,800 watts = ???
Sezvo ndaive ndichiyemura imwe yePro Audio Technology ye 18-inch subwoofers munguva yekushanyira kambani gore rakapfuura, kambani yekambani Paul Hales akashamisika ini paakandiudza mhando yandakanga ndakatarisa yakanga isiri iyo yakawanda pasi pekambani inoita. "Isuwo tine imwe ine 24-inch driver, pamatunhu makuru kwazvo," akadaro. Kuenzanisa iyo ingangodaro iine simba rakasimba pane dzose randakaonana naro, ndakabva ndabvunza Hales kana ndaigona kudzoka kunomhanya CEA-2010 yakawanda yakakura yezviyero imwe ye 24-inch subs-model number LFC-24SM, uremu hunopfuura mapaundi mazana matatu , mutengo we $ 10 000 - panguva inotevera yaaiva nayo.
Ini pakupedzisira ndakawana mukana wangu nhasi. Ndakafunga kuti zvingava nyore kwandiri kuti ndiite motokari kubva kumusha mangu kuchamhembe kweLos Angeles kuenda kuneV Audio Audio HQ muLake Forest, Calif., Pane kutumira subwoofer. Saka ini ndakaisa zvinhu zvose zvangu zvekuyera, kusanganisira ine 15-inch handmade measurement reference reference subwoofer, uye yakananga kumaodzanyemba kweAre Orange County.
02 of 04
Pro Audio Technology LFC-24SM: The Backstory
Apo ini ndakanga ndichigadzirira zviyero, ndakabvunza Hales kuti kambani yake yakaita soroofer yakakura kudaro, uye zvavanoita nayo.
"Ndezvekuvakwa kwemaholo makuru emusha, uye vanhu vanoda kuchenesa, mabhesi makuru," akapindura kudaro. "Pari zvino tiri kuisa vaviri vavo muimba yemitambo iyo inonyanya kufanana nekambani yemabhizimisi ekutengeserana, ine nhandare yepamusoro yevanhu vanenge 80. Zvakakodzera kuti iwe uise mamwe maviri aya mberi uye mamwe madiki mashomanana ari kumashure kuti abvise zvinyorwa muimba. "
I-LFC-24SM inoshandisa mutyairi mumwe chete 24-inch mune imwe quad-ported cabinet. Hales yakarigadzira kuti ishande nevakukudziri vekambani yake, iyo ine majekiti akawandisa ekugadzirisa zviratidzo (DSP) yakavakwa kuti iite mhinduro. "Iyo yatinoshandisa nhasi ndiyo itsva, mufananidzo unobudisa 6,000 watts mu 2 ohms," akadaro. "Mutyairi mune iyi sub 8 ohms, saka tiri kuwana anenge 1 800 watts kunze kwechi."
Vashandi vemu Subwoofer vangave vakashamiswa kuziva kuti pasinei nekukura kwayo, LFC-24SM haina zvinyorwa pasi pe20 Hz. Sei usingashandisi mutyairi mukuru kuti awane kugadzirisa pasi? "Chinangwa chedu ndechekuti tibatanidze LFE [low-frequency effects] band sezvinoita zvisingabviri," Hales akatsanangura. "Isu tine high-pass subsonic filter iyo inokonesa zviratidzo pasi pebhokisi rekutengesa nguva, iyo inenge inenge 22 Hz. Izvozvo zvinoderedza kusvibisa uye zvinodzivirira mutyairi.
"Chikamu chechikonzero chikonzero chechikamu ichi chakakosha zvakadai ndechokuti kutyaira kwomutyairi 99 dB pa 1 watt / 1 mita. Iwe haugoni kuita mutyairi unoenda ku 8 Hz uye ane unhu hwakanaka uye hwakavimbika. "
03 of 04
Pro Audio Technology LFC-24SM: Inzwi
Zvechokwadi, ndakashamisika sezvo ini ndakamhanyira zviyero kuti ndione kuti kubva pamakiromita angu akareba makiromita makumi maviri kubva ipapo, mutyairi weLFC-24SM wakaita seaifamba kuenda kusvikira ndasvika kusvika kuHz 20, iyo yakaderera nguva yakawanda. Ndiine zvakawanda zvandinowana, ndinoona nyore nyore mutyairi achifamba kunyange kubva pamakumbo makumi maviri.
Izvo zvakandishamisawo ini kuti yakachena sei LFC-24SM pandaive ndichiita zviyero. Mazhinji e-subwoofers ini anonzwika seanenge ava kuda kuzvibvarura nepakati pavanosvika pakakwirira zvakakwana kusvika kune imwe yeEECA-2010 yakaipisisa zvipingamupinyi. I-LFC-24SM yakaratidza zvakajeka, zvakanatsanangurwa uye isina kuputika mukati mese inenge yose sero yekuenzanisa, kungotanga kurira tad yakaoma kana ndasvika kusvika kuHz 20. Kazhinji, harmonic chete yekuvhiringidza iyo yakaputsa mutemo weAECA-2010 yaiva yehu harmonic yechitatu; pane mukana wakaisvonaka wokuti iyo yakakura, kwete mutyairi, kusvika pamiganhu yayo.
(Ndiri kunyanya kunyora izvi here?) Verenga my CEA-2010 primer kuti udzidze zvakawanda pamusoro pechinhu ichi chinonakidza uye chinokosha chekuyera.)
Saka pasina kunze kwekunge ado, heino zviyero ...
04 we 04
Pro Audio Technology LFC-24SM: Matanho
CEA-2010A Traditional
(1M peak) (2M RMS)
40-63 Hz av 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
Ndakaita matanho eEEC-2010 achishandisa kemikorofoni yeM Earthworks M30, M-Audio Mobile Pre USB interface uye freeware CEA-2010 software yakagadzirwa naDon Keele, iyo inowanzoenda kune Wavemetrics Igor Pro scientific software. Ndakatarisa zviyero zvangu kumhinduro yeimba yeProte Audio Technology nokutanga kuenzanisa tsanangudzo yangu ye-15-inch inzvimbo, nekuenzanisa chiyero ichocho kune chiyero chandakatora mupaki ine 50 + mamita ekubvumira kunharaunda dzose, ndokubva ndabvisa imba chiyero kubva pakero yepaki kuumba kururamisa kuronga.
Izvi zviyero zvakatorwa pa 3 mamita peak output, uye yakaiswa kusvika 1-meter yakaenzana neEA-2010A zvido zvekubika. Izvo zviyero zviviri zvezviyero zvakaratidzwa - CEA-2010A uye nzira yemadzitateguru - zvakafanana, asi chiyero chetsika (iyo inonyanya kubudiswa mawebsite nevakawanda vanogadzira) inoguma migumisiro pa 2-mita mamita RMS yakaenzana, iyo -9 dB inopfuura CEA-2010A kubika. Miviri inotarwa mu pascals.
Kuisa maitiro aLFC-24SM mune maonero, simba rakanyanya zvikuru randinogona kukuyeuka kusvika kusvika nhasi iSVS PC13-Ultra. Nechirongwa che CEA-2010A chekuzivisa, PC13-Ultra inenge 125.8 dB kubva 40 kusvika 63 Hz uye 116.9 dB kubva 20 kusvika 31.5 Hz, uye inopa 114.6 dB pa20 Hz. Saka, kubatsirwa kweLFC-24SM kune +9.7 dB kubva pa40 kusvika ku 63 Hz, +13.6 dB kubva pa20 kusvika ku31,5 Hz, uye +9.1 dB pa20 Hz. Zvechokwadi, iyo PC13-Ultra inodhura $ 1,699 uye inenge chikamu chehukuru hweLFC-24SM.
Hales akaitawo chekurumidza kutarisana nemapirita ake SPL (akaonekwa kumusoro). Akandikumbira kuti ndimhanya 60 Hz sine wave, ndokuita chiyero pamamiriyoni 1 pane zvaaifunga kuti yakakwirira kupfuura yakachengeteka. Iwe unogona kuona mugumisiro pamusoro apa. Izvi zvinoreva inzwi rinopfuurira; CEA-2010 inopa nhamba dzakakwirira nekuti inoshandisa 6.5-cycle-breaks tones iyo iri pedyo nehupenyu hwezvinyorwa zviri mumhanzi chaiwo uye mafirimu.
Ndinofungidzira panogona kunge kune simba guru rinowanikwa kunze uko - Ndakaona mufananidzo wehupenyu hukuru guru Bob Heil pedyo ne 36-inch imwechete kamwechete, uye kamwe kamwe ndakagumburwa pane imwe nzvimbo muVancouver, BC kugadzira zvigadzirwa zvekugadzira zvakange , sezvandinoyeuka, maviri JBL 18-inch pro pro woofers kusvitsa 30-inch front radiator mu-isobarik. Asi neimwe nzira, ndinofunga kuti hazvikwanisiki kuti ini ndichazongoyera CEA-2010 nhamba dzakakwirira sezvandakawana kubva kuLFC-24SM. Iye zvino ndinongoda kuziva kuti ndingagadzirisa sei chinhu ichi muimba yangu yekuteerera. Zvimwe kana ndikabvisa mubhedha ....