Question about Onkyo TX-SR506 Receiver

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My receiver produces a humming noise that is so dang annoying I can't stand it. On top of that you have to have the volume of 50 or better to even he speakers what can be the problem?

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I had this problem also on a different set top box (STB). What I did to get rid of that annoying humming noise was to unplug the RED plug only (from red, yellow, white combination) from the back of the STB, YEY!!! peace!!! This did not interfere with the picture or audio quality.

Posted on Apr 05, 2010

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The humming noise could be just about anything. The most common is AC noise, if your receiver has a three prong power plug, go to home depot/lowes/ace and get a two prong adapter. This can take out the most common noise which is carried over the common wire and it only cost a buck or so. Now, if this does the trick, it is Not a long term solution, you need to have a line conditioning theater surge protection unit like monster or panamax. If you already have one, chances are good that the problem is internal on the receiver and it needs serviced.

As for the Volume control, hard to say, every receiver volume's up differently. If you are constantly adjusting the volume from it being either too loud or too soft, you need to go into the receivers "setup menu" find speaker settings and adjust the center channel up. As you get more familliar with the receivers settings, adjust the left and right front speakers then the surround speakers, lastly, the subwoofer. Season it to your taste, sound is very subjective and everyone has their own likes and dislikes. If you still have an issue with noise or sound quality, post a comment and I can help you some more. Hope this helps

Posted on Jun 26, 2009

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Subwoofer is hummig what is this noise


Hum is a constant low-frequency buzz, usually at about 60 Hz or 120 Hz, which results from voltage differences between true "ground" (what you'd get shoving a copper pipe into the ground) and the electrical "ground" of your receiver's chassis When this voltage differential exists, it's called a "ground loop," and the hum it produces is darned annoying. You'll hear the hum mainly from the subwoofer because it's a low-frequency noise, you will need a ground loop insulator they are about $20 at any electronic store

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I hear a humming noise from my Sunfire subwoofer - occassionally. I bought a kit from Radio Shack that supposed to cut down on noise from the electric outlet - it didn't work. Please help!


How to isolate annoying background hum.

As long as the music or movie is playing, you can forget about it, at least until a quiet passage occurs, then there it is again: HUMMMMMMM! Be gone, bad hum, you think. But, like a bad odor at the back of the fridge, it takes some dogged persistence to track it down and eliminate it.

Hum is a constant low-frequency buzz, usually at about 60 Hz or 120 Hz, which results from voltage differences between true "ground" (what you'd get shoving a copper pipe into the ground) and the electrical "ground" of your receiver's chassis, the incoming cable-TV feed, or any video or audio components interconnected within your system, including powered subwoofers. When this voltage differential exists, it's called a "ground loop," and the hum it produces is darned annoying. You'll hear the hum mainly from the subwoofer because it's a low-frequency noise, but there will also be hum from your floorstanding front speakers or even compact bookshelf models.

First, try disconnecting your subwoofer from the coaxial sub cable from your AV receiver but leave the subwoofer turned on. Does the hum go away? If it does, then the ground loop is entering the system from your AV receiver and/or your cable-TV system set-top box (or satellite dish and decoder).

Disconnect the incoming TV-cable or satellite feed to a set-top box or to your TV and the A/V receiver. If the hum disappears (and you don't use a satellite dish) complain to the cable-TV company. They may know what you need and supply you with a ground-isolating transformer. If they don't know what you are talking about you'll need to order a video ground isolator and install it in-line with the TV cable before it enters your set-top cable-TV box. Axiom has special wide-band isolation transformers that will not interfere with any digital TV or HDTV signal. (N.B. You CANNOT use one of these with a satellite decoder box.)

Before you order one, you can try plugging your subwoofer into a different AC outlet in the room, ideally one that is not on the same circuit as your AV receiver and video equipment (TV, DVD player, sat or cable TV box, etc.) That may solve the problem. If it doesn't, see if the back panel of your sub has a "ground-lift screw". It will be labeled as such. Just remove it. That may remove the hum. If it doesn't and you have a standard cable-TV feed (not a dish), then order the ground-isolation transformer. (Axiom has special wide-band isolation transformers that will not interfere with any digital TV or HDTV signal.)
Axiom Audio Ground Isolator

If that still doesn't eliminate the hum, or if you use a satellite dish video feed, then you could try one of these from Radio Shack, which goes between the subwoofer and the coaxial cable from the receiver's subwoofer output.

With persistence, all ground-loop problems can be solved.

Hope it helped..

Have a nice day...

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We have 50" Samsung DLP


Yes,the tv have a colors wheel and it is the cause of these problems.Humming noises,motor noises,picture flashes black&white or colors pictures within the pictures.The colors wheel,is dying or already dead.Hire a tv tech. replaced the colors wheel,will solved ur tv problems.

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If the noise is accross all channels then it's most likely the large electroltic capacitors in the power supply. These filter out the mains hum 50/60hz. There might be two or more they will be the biggest! Even if you can determine only one has gone, it's best to replace them all.

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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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Keep us posted.

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