Question about Acoustic Research AW-721 Consumer Headphones

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Sound from only one headphone

I am only getting sound from one headphone. I have checked the balance on my receiver, etc. but it is not that.

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Re: sound from only one headphone

I purchased an AW 771 set in "as is" condition which on arrival produced output only from one side. Repair was effected by removing 8 phillips screws, 4 from each side, concealed under the ear-surrounding doughtnut-shaped cushions. To expose those screws, the ear cushions must be pushed from their center toward the outside. Black screws in back holes surrounded by black acoustically-transparent cloth does not make them obvious.

I used a volt-ohm meter to find a discontinuity at a failed solder connection. Resoldered that connection, rechecked electrical continuity to be certain all connections were good. Tested with batteries installed using an audio input. Both sides produced sound. Replaced screws and they have performed very well since then.

I hope this Model AW771 experience is helpful in restoring your AW-721 to working order.

Posted on Feb 13, 2008

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I can only hear out of the left side of the headphones. They are only 1 month old and they worked fine at first.

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Ive a problem with the volume of the headphones, the right one works fine but there is no sound from the left side....ive tested the headphones on other electronic equipment and the headphones work the...

Hi,,in most cases what causes one side of the headphone to work is because, the wire that is connected to speaker inside the headphone might have cut and it's not contacting properly.

What you will need to do is to open up the head phone (left),and check if the wire inside has not cut, If it has removed ,then you will need to put it back with soldering iron and a lead...

But if the wire inside has not removed and they are intact, then you will have to replace the left speaker .

Hope that helps...

Thanks for using fixya...

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Check for a loose connection in the wire. Wiggle (carefully) the wire around both the headset where it sits on your heat. Also, check the other end (plug) to see if there are any shorts. If this simple "wiggle" test shows nothing, there may be a problem with the driver (speaker) in the right channel in your headphone.

Another thing to check and this should be obvious: make sure your balance on your stereo/receiver is set to be in the middle and not to the left.


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