Question about Bose Companion 3 Series II Multimedia Speaker System (3-Piece) - Graphite/Silver

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What can cause loud humming?

I have a new Bose L1 Model II and a new Mackie DL1608 and when connected I am getting a loud humming? Any suggestions??

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The most likely cause of hum with a Bose L1® connected to a mixer is a ground loop. Try connecting the L1® and the mixer to the same power source.
Here is an article specifically about hum with the L1®
Audio System Noise and the L1

Posted on Jan 18, 2015

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How to connect bose 5.1 to mixers

Posted on Jul 16, 2013

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SOURCE: Bose companion II speakers

You mean this adapter: 3.5mm STEREO JACK M TO 2 RCA F ADAPTER

Posted on Aug 15, 2008

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SOURCE: Loud hum when Bose Companion 3 Series II speakers are turned on.

I had the same problem for many months. I asked a sound & video professional and he suggested I move the subwoofer away from any power source. I had the subwoofer next to my UPS. Once separated and moved all wiring away from the power supply (about 12") the low bass hum was practically gone.

Posted on Nov 14, 2009

bronk50
  • 27725 Answers

SOURCE: get loud hum from both

try swapping the speakers around if the problem still persists either the speaker is faulty
the speakers plug/outlet is usually at the back of the computer you will have to open up the computer to check the lead attached to the rear of the input plug make sure the connection is good
be sure to wear an anti static earth strap before touching anything inside your computer
try cleaning your computer of dust using a fine air blower from a compressor making VERY sure that there is no MOISTURE in the air line specifically around the CPU central processing unit and your sound card dust causes static to build up in a computer causing it to overheat any many other problems
hope this helps

Posted on May 23, 2011

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1 Answer

How to hook up bose L1 Model II with two B2


From the Bose instruction manual (wonderful what can be achieved when one reads ;) )...

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The Tone Match unit is not receiving power


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Mackie dl1608 and Bose l1 humming


This sounds like a ground loop.
Make sure that everything in your signal chain (mixer and anything that plugs into the mixer, and the L1®) are all plugged into the same power source (power bar).
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Ground Loop Bose L1 Encyclopedia FAQ Wiki

Jul 11, 2013 | Audio Players & Recorders

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Just bought a ProFX8 mixer to connect to my Bose L1 PA system, but as soon as I connect the outputs to the Bose inputs and raise the master fader there is a "ground hum" even without anything...


Make sure you are using BALANCED audio interconnect cables AND that the speakers and the mixer are powered from the SAME receptacle... Yes, this means running extension cords. It is a ground loop problem. You should be using XLR or TRS cables BALANCED cables from the mixer to the basss unit of the L1 system. The bass unit and the mixer MUST be powered from the same receptacle to avoid ground loops and hum.

Aug 17, 2011 | Mackie ProFX8 Professional Compact Mixer

1 Answer

Get loud hum from both bose companion II speakers when i disconnect left speaker hum goes away tried most everything else thanks


try swapping the speakers around if the problem still persists either the speaker is faulty
the speakers plug/outlet is usually at the back of the computer you will have to open up the computer to check the lead attached to the rear of the input plug make sure the connection is good
be sure to wear an anti static earth strap before touching anything inside your computer
try cleaning your computer of dust using a fine air blower from a compressor making VERY sure that there is no MOISTURE in the air line specifically around the CPU central processing unit and your sound card dust causes static to build up in a computer causing it to overheat any many other problems
hope this helps

May 23, 2011 | Bose Companion II Computer Speakers

1 Answer

Loud hum when Bose Companion 3 Series II speakers are turned on.


I had the same problem for many months. I asked a sound & video professional and he suggested I move the subwoofer away from any power source. I had the subwoofer next to my UPS. Once separated and moved all wiring away from the power supply (about 12") the low bass hum was practically gone.

Jun 28, 2009 | Bose Companion 3 Series II Multimedia...

1 Answer

Loud hum with static when speakers turned on


There is def. a loose connection somewhere in your system. This is a grounding problem within the system if nothing else. Def. a "lazy" connection somewhere.

gurutim

Mar 10, 2009 | Bose Companion 3 Series II Multimedia...

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