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VK 55 - amplificator performant pe tuburi
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VK 55 - amplificator performant pe tuburi

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The Balanced Audio Technology VK-55 represents BAT's latest application of modern design principles to the development of a compact, affordable, yet supremely easy to use tube power amplifier that sets a new standard for musicality in its class. The result is a unique combination of fully balanced, all-triode design topology, combined with selectable feedback, automatic biasing of individual output tubes, and a marvelously simple upgrade path to monoblock application all in a chassis that is 33% more compact than any previous BAT tube design! More importantly, the VK-55 is eminently affordable as well.


Output Power (Stereo Model) 55W

Output Power (Monoblock) 110W

(At less than 3% THD)

Frequency Response 7Hz to 220kHz

Input Impedance 215 k?

Gain (nominal into 8 ?) 25dB/20dB

Dimensions 17" x 16" x 8"

Weight 50 lb.


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Eu sint curios ce traf de iesire folosesc care sa lucreze in gama 7Hz pina la 220000Hz...


Minciuna sau?

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Limitele benzii de frecventa sunt indicate intotdeauna pentru o abatere de -3 dB. Oricum, oameni care percep sub 20 Hz si/sau peste 20 kHz sunt foarte rari. Asadar limitele mult sub 20 Hz si/sau mult peste 20 kHz dau indicatii cat de liniara este amplificarea in banda utila, adica in intervalul 20 Hz... 20kHz.

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Foloseste mai multe trafuri pentru fiecare banda de frecventa conectate prin filtrele necesare, am mai facut si eu de genul, asta este solutia profesionala, nu stiu daca are iesiri separate pentru difuzoarele pentru diferitele benzi de frecventa sau sunt insumate.

Curent folosesc amplificator audio full simetric cu tranzistoare cu banda de castig unitar 5 Mhz si SR 100v/microsecunda.

Specialistii in fiziologia auzului au aratat ca banda amplificatorului conteaza chiar si domeniul ultrasonic.


Pentru amplificatoarele cu reactie (feedback) banda conteaza pentru a avea castig in bucla si la frecvente mai mari, asta se traduce prin liniaritate la frecvante mai mari, si intremodulatie mai slaba.

Edited by cavit
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