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Problem Possible cause Solution
Loudspeakers
operate at
different levels
Sound level on the amplifier incorrectly set Adjust the sound level on the amplifier. (Advice on how to do this can be found in the
instructions supplied with your amplifier.)
Sound
reproduction
too soft
1. Volume of subwoofer set too low Increase the volume using the volume control
2. Only for High Level input: inputs reverse-poled Check the poles: the red outlet, or the outlet marked with + on the amplifier, must be
connected with the red input jack of the subwoofer
3. Outlet level on amplifier set too low for the subwoofer
outlet (cinch outlet)
Increase the volume level on the amplifier. If the level of the subwoofer outlet cannot go
any higher, reduce the level of the other outlets to the same level
ENG
Problème Cause possible Solution
Le subwoofer
ronfle
1. Le câble de transmission des signaux de l‘amplificateur
au subwoofer est trop long
Utiliser un câble de transmission des signaux plus court
2. Le câble de transmission des signaux utilisé n‘est pas
déparasité ou le blindage du câble utilisé est interrompu
(défectueux)
Remplacer le câble par un câble blindé
3. Boucle de mise à la terre (boucle de ronflement)
«générée»
Une boucle de mise à la terre peut être générée lorsqu‘au moins deux appareils reliés par des
câbles de transmission des signaux (Cinch) à fiches de prise de courant de sécurité (par ex.
amplificateur et ordinateur) sont connectés à des prises de courant séparées dans l‘espace.
Connecter chacun des appareils reliés à l‘amplificateur par une fiche de prise de courant de
sécurité sur un même bloc multiprise.
4. Un consommateur non déparasité (un réfrigérateur,
par ex.) sur le secteur
Mettre les sources de parasites possibles hors circuit pour le test; faire déparasiter l‘appareil
concerné si le ronflement disparaît ou, dans un premier temps, connecter la source de parasites
à une autre phase du secteur (L1, L2 oder L3). (Si nécessaire, consulter un spécialiste.)
Connecter un «filtre de courant sur la gaine» spécial (en vente dans le commerce spécialisé)
entre l‘amplificateur et le subwoofer pour éliminer le ronflement
Faire pivoter la prise secteur pour réduire la tension dite d‘ondulation.
(Particulièrement important quand l‘amplificateur n‘est pas mis à la terre.)
FRA
28


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