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ELFORUM - Forumul electronistilor

Rezistenta c.c.la bobina difuzor cod:LF.ZZ 10049 (B&W DM601)


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Difuzoarele sunt masurate la bornele lor; "8ohm" e marcajul de pe eticheta difuzoarelor.Pentru un difuzor cu Z= 8 ohm,Rc.c.ar trebui sa fie cuprinsa intre 5,7-6,7 ohm.Ori difuzoarele sunt o exceptie ,ori au spire in scurt circuit(amandoua);din acesta cauza am intrebat daca are cineva unele "noi",pentru a compara rezistenta.In incinta originala firma da Zmin=4,2 ohm,iar difuzoarele de joase(cele de mai sus) sunt inseriate cu o bobina, filtru ordin 1 ,F.sep.=4khz.

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Ce valoare are bobina? In cel mai bun caz ai o impedanta in jur de 5-6ohmi, dar mai mult nu prea ai cum. Foloseste un amplif mai tzapan pt ele si gata.Daca ar fi spire in scurt wooferul ar avea inductanta f mica, iar impedanta nu ar creste cu frecventa, iar spl-ul ar fi jalnic. Doi la mana, compara-le intre ele. Daca-s la fel atunci asa e modelul. Nu au cum sa se strice ambele la fix 3.9ohmi.

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