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2-6-6-1 : Calcul d'un atténuateur à impédance constante, 2/2
Mise à jour : 29 mai 2018
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Atténuation souhaitée : dB.
Impédance du haut-parleur : Ohms.
Puissance de l'enceinte : W.
Résistance R4 : 0.00 Ohms. Puissance de la résistance supérieure à : 0.0 W.
Résistance R5 : 0.00 Ohms. Puissance de la résistance supérieure à : 0.0 W.
Tension qui traverse le haut-parleur : 0.00 V, ( 0.0 W sur Ohms ).
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R4 peut être réalisé, pour tenir la puissance voulue, avec :
résistances de Ohms en puissance 10 W + 1 résistance de Ohms, toutes les 2 branchées en parallèle pour avoir 0.00 Ohms.
D'autres combinaisons sont bien sur possibles.
En cas d'erreur de calcul, ajoutez 0.01 ou 0.02 dB à l'atténuation.
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R5 peut être réalisé, pour tenir la puissance voulue, avec :
résistances de Ohms en puissance 10 W + 1 résistance de Ohms, toutes les 2 branchées en parallèle pour avoir 0.00 Ohms.
D'autres combinaisons sont bien sur possibles.
En cas d'erreur de calcul, ajoutez 0.01 ou 0.02 dB à l'atténuation.
Atténuation de votre haut-parleur.
Atténuation sur des impédances différentes :
L'impédance d'un haut-parleur n'est pas toujours constante.
Il est important de savoir ce qui se passe lorsque l'impédance du haut-parleur change au niveau de l'atténuation et de l'impédance vue par le filtre.
Idéalement l'atténuation et l'impédance vue par le filtre ne devraient pas changer.
En pratique, vous constaterez vous même...
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Impédance du haut-parleur : 0.00 Ohms. Atténuation vérifiée : inf dB. Impédance vue par le filtre : 0.00 Ohms.
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Impédance du haut-parleur : 0.00 Ohms. Atténuation vérifiée : inf dB. Impédance vue par le filtre : 0.00 Ohms.
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Impédance du haut-parleur : 0.00 Ohms. Atténuation vérifiée : inf dB. Impédance vue par le filtre : 0.00 Ohms.
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Impédance du haut-parleur : 0.00 Ohms. Atténuation vérifiée : inf dB. Impédance vue par le filtre : 0.00 Ohms.
Retour au chapitre Egalisation des niveaux
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