Acoustimass 10 Series V Subwoofer Hum

Home Theater
1

I own a AM 10 Series V for 3 years.

The system is always powered on. Is that OK?

 

Sometimes (and I cannot clearly identify when or why, random) the subwoofer starts to hum. It only happens when the receiver is off.  The hum noise volume is not always at the same level.  I noticed that sometimes it happens when I open the door and wind enter to the room, but also happens without any event.

In order to fix momentary the problem I have to touch/move the LFE / Bass controls (sometimes the sound volume moves while touching these keys, and it is not always easy cancel). In the worse cases I had to unplug the power cord.

I also reversed the power wires, but there was no change.

I assume it is not a ground loop because it happened while AVR is power off and it is not a permanent sound, it starts random. Both units, the AVR and the speaker system are powered by power transformer.

 

Any suggestion that can help are welcome.

 

BR,

EdW

 

 

2

Hey EdW, 

 

Thanks for your post and welcome to the Community!

 

This is a very strange issue and not something that we would expect. This sounds as though it may be interference. Do you have any electrical items around the system? 

 

I would recommend, the next time it happens, try switching off some of these electricals and see if this improves the issue. 

 

Let me know how you get on!