Graham LS5/9 Monitor BBC

Okonza owunikira a BBC, ndithudi, sankadziwa kuti ntchito yawo idzapanga bwanji ntchito yaikulu komanso yaitali. Sanaganize kuti adzakhala nthano, makamaka pakati pa ogwiritsa ntchito hi-fi kunyumba, omwe sanalengedwere konse.

Amapangidwa kuti azigwiritsidwa ntchito ndi masitudiyo a BBC ndi otsogolera pamikhalidwe ndi zolinga zodziwika bwino, zokonzedwa mwaukadaulo koma zothandiza, popanda cholinga chosinthira ukadaulo wa zokuzira mawu. Komabe, m'mabwalo ena a audiophile, chikhulupiliro chakhala chikufalikira kwa nthawi yayitali kuti chinthu chapafupi kwambiri ndi chachikale, makamaka British, zopangidwa ndi manja - makamaka oyang'anira mashelufu omwe ali ndi chilolezo ndi BBC.

Zotchulidwa Kwambiri kuwunika kuchokera mndandanda wa LS chaching'ono kwambiri, LS3/5. Monga oyang'anira onse, BBC poyamba idapangidwira cholinga chapadera ndi zolepheretsa zoonekeratu: kumvetsera m'zipinda zing'onozing'ono, m'madera oyandikana kwambiri, komanso m'malo opapatiza kwambiri - zomwe zinapangitsa kukana mabass ndi voliyumu yapamwamba. Chikumbutso chake, mtundu waposachedwa unatulutsidwa pafupifupi zaka khumi zapitazo ndi kampani yaku Britain KEF, imodzi mwa ochepa omwe adalandira chilolezo cha BBC kuti apange LS panthawiyo.

Posachedwapa, wopanga wina, Graham Audio, adawonekera, akukonzanso kapangidwe kake kodziwika bwino - Onani LS5/9. Iyi ndi imodzi mwama projekiti aposachedwa a BBC, koma "imapangitsa chidwi" cha ma SL am'mbuyomu.

Zimawoneka ngati zazikulu kuposa momwe zilili. Zikuwoneka ngati nyumba yoyambirira ya 70s, koma ndi yaying'ono chifukwa ndi "yokha" zaka makumi atatu. Palibe mlengi m'modzi yemwe anali ndi dzanja mu izi, zomwe lero zimangowonjezera kukopa kwake, chifukwa zikuwonekeratu kuti tikuchita ndi oyankhula kuchokera ku nthawi ina.

Momwe zinaliri mu 80s

Mawonekedwe a LS5/9s oyambilira nthawi zambiri amakhala a prosaic, ndipo mikhalidwe yomwe amayenera kukumana nayo inali yofanana. M'mbuyomu, BBC idagwiritsa ntchito kwambiri ma LS3/5s, omwe mabass awo ndi kukwera kwake kunali kochepa kwambiri, kapena LS5 / 8s, yomwe imapereka bandwidth yotakata, makamaka pamayendedwe otsika, mphamvu zambiri komanso kuchita bwino, koma komanso miyeso yayikulu kwambiri - yokhala ndi kabati yopitilira malita 100 yofunikira pa 30 cm midwoofer. Masiku ano palibe amene angayerekeze kupanga njira ziwiri zogwiritsira ntchito situdiyo, mocheperapo kuti agwiritse ntchito kunyumba, yokhala ndi 30cm mid-woofer ...

Chifukwa chake chowunikira chapakatikati chimafunikira - chocheperako kwambiri kuposa LS5 / 8, koma osati cholumala pamabass monga LS3 / 5. Zinangolembedwa ngati LS5/9. Oyang'anira atsopanowa amayenera kudziwika ndi kusinthasintha kwa ma tonal (ndi kutsika kwa mlingo wocheperako malinga ndi kukula kwake), kuthamanga kwa phokoso lapamwamba koyenera kukula kwa chipindacho, ndi kutulutsa bwino kwa stereo.

LS5/9 imayenera kumveka ngati LS5/8, zomwe okonzawo sanaganize kuti sizingatheke ngakhale kusintha kwakukulu kwa midwoofer miyeso. Kukonzekera kwa crossover kungawoneke ngati kofunika (ngakhale kwa njira zina zowoloka ndizothandiza pang'ono), tweeter yomweyi imagwiritsidwanso ntchito pano - dome lalikulu, 34mm, lochokera ku kampani ya ku France ya Audax.

Mbiri ya midwoofer ndi yosangalatsa kwambiri. Kufunafuna zinthu zabwinoko kuposa cellulose yomwe imagwiritsidwa ntchito kwambiri kudayamba msanga. Kupindula koyamba kunali zinthu za Bextrene zomwe zinapangidwa ndi KEF ndipo zimagwiritsidwa ntchito mu 12cm midwoofers (mtundu wa B110B), monga owunikira a LS3 / 5. Komabe, kumbuyo (mtundu wa polystyrene) kunali kopanda phindu.

Kupaka m'manja kunali kofunika kuti mukwaniritse zomwe mukufuna, zomwe zimapangitsa kuti zikhale zovuta kusunga kubwerezabwereza, ndipo ndi zokutira, nembanembayo imakhala yolemera kwambiri, yomwe imachepetsanso mphamvu. M'zaka za m'ma 70, Bextrene inasinthidwa ndi polypropylene - ndi zotayika zazikulu, zomwe sizikusowanso zina zowonjezera.

Ndikoyenera kudziwa kuti panthawiyo polypropylene inali yofanana ndi yamakono ndipo imayenera kusintha mwadongosolo "cellulose" yachikale.

Kudumphira mofewa mumasiku ano

Masiku ano, polypropylene ikugwiritsidwabe ntchito, koma makampani ochepa ali ndi chiyembekezo chachikulu. M'malo mwake, nembanemba za cellulose zikukonzedwa ndipo zophatikiza zatsopano, zophatikizika ndi masangweji zikupangidwa. Kampani yomwe idapanga ma speaker apakati awa adamwalira kalekale ndipo alibe makina "amphesa". Zotsalira za zolemba ndi makope ena akale omwe apambana mayeso. Kampani yaku Britain ya Volt idapanganso ntchito yomanganso, kapena kupanga zokuzira mawu pafupi ndi choyambirira.

Ma Hull ndi omwe amatsogolera kwambiri zakunja zomwe zimamenya LS5/9. Luso lawo limanunkhira ngati mbewa ndipo ndi losavuta, koma ngati muyang'anitsitsa mwatsatanetsatane, limakhala lokongola komanso lokwera mtengo.

Woofer ndi wokwera kumbuyo, womwe unali wofala zaka makumi angapo zapitazo ndipo tsopano wasiyidwa palimodzi. Yankho ili lili ndi acoustic drawback - m'mphepete lakuthwa limapangidwa kutsogolo kwa diaphragm, ngakhale kuti ili ndi mthunzi pang'ono ndi kuyimitsidwa kumtunda, komwe mafunde amawonekera, kuphwanya mawonekedwe opangira (ofanana ndi m'mphepete mwa makoma ambali omwe amatuluka kutsogolo kwa makoma a mbali). kutsogolo). Komabe, chilema chimenechi si chachikulu kwambiri moti munthu angachisiye n’cholinga choti chichotsedwe. Mtundu woyambirira wa LS5/9… Ubwino “waluso” wa zochotseka kutsogolo gulu kapangidwe anali ndi zosavuta kupeza zonse dongosolo zigawo zikuluzikulu. Thupi limapangidwa ndi birch plywood.

Masiku ano, 99 peresenti ya makabati amapangidwa kuchokera ku MDF, m'mbuyomu ankapangidwa kuchokera ku chipboard. Yotsirizirayi ndi yotsika mtengo, ndipo plywood ndi yokwera mtengo kwambiri (ngati tifanizira matabwa a makulidwe ena). Zikafika pakuchita kwamayimbidwe, plywood mwina ili ndi othandizira kwambiri.

Komabe, palibe chimodzi mwa zipangizozi zomwe zimapindula bwino kuposa zina, ndipo osati mtengo ndi zomveka zomveka ndizofunikira kwambiri, komanso kumasuka kwa kukonza - ndipo apa MDF imapambana bwino. Plywood imakonda "kupeta" m'mphepete ikadulidwa.

Monga mankhwala ena, plywood mu chitsanzo chomwe tikukambiranacho chimakhala chochepa kwambiri (9 mm), ndipo thupi lilibe zowonjezera zowonjezera (mbali, mipiringidzo) - makoma onse (kupatula kutsogolo) amathiridwa mosamala ndi mateti a bituminous ndi "quilted". zofunda”. “wodzazidwa ndi thonje. Kugogoda pabokosi lotere kumapanga phokoso losiyana kwambiri kusiyana ndi kugogoda pa bokosi la MDF; Chifukwa chake, nkhaniyi, monga ina iliyonse, pakugwira ntchito idzawonetsa mtundu, womwe, komabe, udzakhala wodziwika bwino.

Sindikutsimikiza ngati akatswiri a BBC anali ndi zotsatira zina m'maganizo kapena ngati ankangogwiritsa ntchito njira yomwe inalipo komanso yotchuka panthawiyo. Iwo analibe zambiri za kusankha. Zingakhale "zopanda mbiri" kunena kuti plywood inagwiritsidwa ntchito, chifukwa inali yabwino kuposa MDF, chifukwa panalibe MDF padziko lapansi panthawiyo ... - izi ndizosiyana kwambiri. Ndi bwino? Chofunika kwambiri ndi chimenecho LS5/9 "yatsopano" inkamveka ngati zoyambirira. Koma izi zitha kukhala zovuta ...

Phokoso ndi losiyana - koma lachitsanzo?

"Owonetsanso" ochokera ku Graham Audio adachita chilichonse kuti abwezeretse LS5 / 9 yakale. Monga tafotokozera kale, tweeter ndi mtundu womwewo komanso wopanga monga kale, koma ndamva mwachidule kuti zakhala zikusinthidwa kwazaka zambiri. Zoonadi, pakati pawoofer, kuchokera kuzinthu zatsopano za kampani ya Volt, adapanga "chipwirikiti" chachikulu kwambiri, chomwe chili ndi makhalidwe osiyanasiyana omwe amafunikira kusintha kwa crossover.

Ndipo kuyambira nthawi imeneyo, sizingatheke kunena kuti LS5 / 9 yatsopano ikumveka mofanana ndi zaka makumi atatu zapitazo. Mlanduwu umakhala ndi mauthenga ochokera kwa ogwiritsa ntchito LS5/9 yakale. Kaŵirikaŵiri iwo sanali okondweretsedwa nawo konse ndipo amakumbukira zimenezo powayerekezera ndi ena BBC monitorsndipo makamaka LS3/5, pakati pa LS5/9 anali ofooka, mwachiwonekere anachotsedwa. Izi zinali zachilendo, makamaka popeza mawonekedwe omwe adavomerezedwa ndi BBC adawonetsanso (monga momwe amayembekezera) machitidwe opatsirana.

Pa intaneti, mutha kupeza zokambirana pamutuwu, ndipo zidatsogozedwa ndi anthu anthawi imeneyo omwe amawonetsa zochitika zosiyanasiyana. Izi zikuphatikizapo, mwachitsanzo, kuganiza kuti wina analakwitsa pa gawo loyamba la kukhazikitsa, ngakhale polembanso zolemba, zomwe palibe amene adazikonza ...

Ndiye mwina pokhapo LS5 / 9 idapangidwa, yomwe iyenera kuwoneka koyambirira? Kupatula apo, Graham Audio adayenera kupeza chilolezo kuchokera ku BBC kuti agulitse malonda ake pansi pa LS5 / 9 index. Kuti tichite izi, kunali koyenera kupereka chitsanzo chachitsanzo chomwe chikugwirizana ndi mikhalidwe yoyambirira ndipo chikugwirizana ndi zolemba zoyezera za chitsanzo (osati zitsanzo za kupanga pambuyo pake). Kotero, pamapeto pake, zotsatira zake ndizo zomwe Air Force inkafuna zaka makumi atatu zapitazo, osati zofanana ndi LS5 / 9 zomwe zinapangidwa kale.