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Bose Acoustimass III Sub hum

 

New member
Username: Timeslice

London

Post Number: 1
Registered: Mar-12
Hi,
I have a 5.1 Bose Acoustimass III system fed from a Yamaha surround amp and the Sub has a constant hum (the level of which is affected by the sub/lfe knobs on the sub unit in case that helps). The hum is also still present when the feed to it is pulled. I have read info suggesting that this is a known issue in this model and maybe fixed in later revisions.

Does anyone know what I might be able to do to fix it, am fairly happy doing mods if necessary. The hum has been present since bought approx. 5 years ago but was never dealt with previously.

Thanks in Advance.

James
 

Silver Member
Username: Vm8444

TorontoCanada

Post Number: 426
Registered: Aug-05
Hi there does sub have a power chord with 3 prongs?
You may want to use a step down connector to plug in wall.
From 3 to 2
Sounds like a ground loop problem which could take loads of time to trace.
Try it
Some stores sell them
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