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Problem Mögliche Ursache Lösung
Subwoofer brummt
1. Signalleitungen vom Verstärker zum
Subwoofer zu lang
Kürzere Signalleitungen verwenden
2. Verwendete Signalleitung nicht abgeschirmt
oder die Abschirmung an der verwendeten
Leitung unterbrochen (defekt)
Leitung gegen eine geschirmte Leitung austauschen
3. Erdungsschleife (Brummschleife) „erzeugt“ Eine Erdungsschleife kann entstehen, wenn mind. zwei mit
Signalleitungen (Cinch) verbundene Geräte mit Schutzkon-
taktstecker (z. B. Verstärker und Computer) an örtlich getrenn-
ten Steckdosen angeschlossen sind. Alle mit dem Verstärker
verbundenen Geräte mit Schutzkontaktstecker an einer
Steckdosenleiste (Vielfachsteckdose) anschließen
4. Ein nicht entstörter Verbraucher
(z. B. Kühlschrank) am Netz
Mögliche Störquellen zum Testen ausschalten; betreffendes
Gerät entstören lassen, falls das Brummgeräusch verschwindet
oder zunächst die Störquelle an einer anderen Netzphase
(L1, L2 oder L3) anschließen. (Falls erforderlich, einen Fach-
mann zu Rate ziehen)
Speziellen „Mantelstromlter“ (im Fachhandel erhält-
lich) zwischen Verstärker und Subwoofer schalten, um das
Brummen zu eliminieren
Netzstecker drehen, um die so genannte Brummspannung
zu reduzieren. (Besonders wichtig, wenn der Verstärker nicht
geerdet ist)
13


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