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Receiver humming momentarily when turned on

When I turn on my Receiver it hums through the speakers for about 3-4 mins. The humming level is constant regardless if I increase the volume or not, then the humming disappear. Thanks.

Posted by Andre Forest on

  • Anonymous Jan 27, 2008

    i have the samen problem. first the humm disappeared after a few minutes, but now it doesnt.

    Problem with the powersuppley ??

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Anonymous

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I have solved thsi problem. The reseller suggested that probably a earthconnection was demaged and indeed that was the problem. by heating the earthconnections, specially the wired ones this problem disappeared.

Posted on Feb 02, 2008

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The subwoofer output on my Kenwood VR-606 has suddenly stopped working. I have tried the "setup" several times, turning the subwoofer off and back on. Also, when I first power up the system, it emits a low...

It sounds like the problem is not with your VR-606. If you hear a hum from the sub, the problem is more likely to be in the sub's built-in power amplifier. However, it is worth resetting the amplifier to factory presets. To do this, unplug the power cable from the mains supply and reconnect whilst holding down the power on/standby key. If the hum persists, connect any powered speaker to the sub-out socket, power on and listen for the hum. If no hum then suspect the powered sub amp. Turn the sub on with no connection to the Kenwood VR-606. If hum persists, the sub has a problem and will need to be replaced or repaired. By the way, you said there is a low frequency hum through the 'speakers' for about 30 mins. Is that all speakers or just the sub? Hope this helps.
Cheers, Don.
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Major hummimng noise when sub is connected to receiver.

Is the hum in the receiver-attached speakers or the sub?


Self-powered sub?


How is the sub attached - RCA or speaker-level?


Disconnect the input(s) and see if it hums in the absence of an audio source. A bad audio cable shield or unwisely-routed audio cables will allow entrance of unwanted signals from external power sources, magnetic fields, even dimmer-controlled track lights. Sometimes, simply reversing the orientation of the ac power plug can eliminate humming.


If it hums with the sub attached, unplug the sub's power cord. Differences in AC ground potentials will generate hum across linked devices.

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Hello, my speakers hum for 10 to 30 seconds when i turn on my receiver. sometimes they do this even with sound coming from the system for up to 10 min. i tried changing the speakers. moving the power,...

i think ur unit deposits humidity . . try to clean it up with smooth paint brush over the boards and connectors . . better yet spray some contact cleaners i think this will do . . . otherwise resolder is needed . .
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My home theater speakers make a constant hum whenever my receiver is on. The loudness of the hum changes with the volume control, and goes away entirely when the system is muted. All components are plugged...

jd40,
Sounds like a grounding issue. The first two places to look into is the powered subwoofer and antenna. During your last test, did you leave the FM antenna and subwoofer connected? Many times the hum is directly related to the antenna and/or the subwoofer and to how they are grounded; creating a ground loop through the receivers ground on the outlet. If the antenna is grounded to the dwellings wiring, hum is inevitable and sometime you can get a ground loop hum from how or how & where the subwoofer is grounded. Try taking them completely out of the loop.

Also try taking it further back to the basics, start with the receiver plugged into a known good grounded outlet with no surge or line conditioner in the loop and nothing connected to the receiver, nothing. Use one speaker and different wire to test each speaker output while in tuner and any other mode but phono. With no signal, you will either get nothing (no hum or static) or just static in the tuner mode. No hum is a good sign. Some systems will mute the speakers if no signal is connected to eliminate the static from being produced through the speakers but a ground loop hum will most likely still be produced even in mute. If you get a hum when nothing is connected to the receiver, try looking into getting a better grounded outlet, even maybe to a different dwelling.

-Chris
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Subwoofer hum from STR-DH800

That points pretty much to a bad shield on the cable. Have you tried another one? Another thing to try is to rotate the AC power cord on the sub (if it has one). Sorry, too lazy to look it up.
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60 cycle hum at the same constant level, even if you turn the volume up all the way, it does not get any louder. What might that be caused from? A bad ground solider joint maybe? The Balance (L&R)...

If the volume control does not effect the hum volume, then the hum is being introduced directly to the final amp section. Check for defective caps in the power supply for the amp section. This will be the nigher voltage supply usually 40V or more.

Dan

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Constant hum when the computers are connected

Hums come from several sources. A light dimmer switch on the wall. Speakers too close to a monitor or other electrical device. Try turning off everything in the room or nearby rooms, one at a time while the hum is audible.
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A couple of weeks after initial setup of my brand new Onkyo XT-SR606 receiver, I noticed a loud buzzing noise that starts up approximately 10 min after the receiver is turned on. The buzzing is definitely...

The "buzz" you hear is a power hum made by the power supply transformer. It's technically called "Lamination hum" caused by the revering of electrical current through the power supply transformer. In some cases the hum can vibrate the chassis causing other loose material to vibrate. If you can, go to your dealer and check to see if other units of this same type typically make a hum this loud, and if not, see if he can solve the problem for you.
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Acoustimass Subwoofer has a low "hummm" sound when turned on.

Sounds like an inadequate ground wire in the signal cable. You may have to replace the cable between the reciever and bass module. It also, however, may be IN the bass or reciever module.
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I bought a second hand blackweb home theater system bwa18s8003 that has only the receiver and subwoofer how can I use this without the speakers I bought a second hand blackweb home theater system bwa18s8003. I am not familiar with speakers and these home theater systems. I thought a subwoofer was a speaker but after getting this home and doing research I see now that there should have been five little speakers making this like a surround sound I suppose. My friend thought it was a home stereo and for $10 I thought I found a heck of a deal. After reading I see that it's not recommended to switch up brands with this kind of systems. I hope I still have a deal. I'm wondering what kind of speakers (this is BT) I need and if second hand speakers possibly bought at thrift store, that aren't Bluetooth or blackweb brand may work. If not does anyone know a cheap place to get the right speakers, if they do indeed have to be replacements only to this system. My hopes was I have a little Bluetooth setup to play music off my phone and a stereo. I am asking for options as to what I can do with this system, being just the receiver and subwoofer without having to spend much more if any more money. For example, can I just plug it to my TV, etc. How can I even check to see if the two parts work before I put time and more cash into it since a subwoofer isn't a speaker how do I know if I can't the sound? I just guidance all around, wondering if I got a deal or do I need to kiss that money bye, and recycle or toss it. Thank you in advance for any directions and/or ideas.

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