Question about Sennheiser RS 120 Consumer Headphones

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There in no green light on RS 120. There is a red light on indicating that the headphone is being charged. Why I cannot use non-chargeable AAA batteries?

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  • Anonymous Mar 30, 2014

    I bought a new pair of headphones a couple of months ago and recently I have been having problems. All i can hear is static. The headphones are connected to the TV and other electronic devices (depends on my needs). They are always on their charging station and I also change their batteries to see if that would fix it but it didn't. The green light that is usually on the emitter is not turning on so there is a red light indicating that they are charging. What may be the cause to such a problem?

    Thank you :)

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The green light only comes on when it is receiving an audio signal.

Standard batteries will work.. if you NEVER use the charging station.. and plan on replacing them every x number of hours used.. IMPORTANT.. if you forget.. and place the headset on the charging station with standard batteries.. they will probably rupture.. and may well ruin the headset..

If you decide to replace the chargable batteries.. make sure you replace them with the right size and type..

Posted on Apr 24, 2009

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I had no green light on sender and only static on headphones. I found that I had inadvertently changed the sound settings on my Samsung TV from fixed to variable. Changing it back solved the problem.

Posted on Apr 06, 2010

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1 Answer

Work fine for about 5 minutes than change to static


There's an auto-shutoff feature which kicks in when the audio input to the transmitter is too low. That's usually indicated by the green light on the transmitter turning off. Just increase the volume on the device connected to the transmitter, and you should see the green light come back on. As long as that's on, it'll stay transmitting and shouldn't just cut out to static.

Jun 25, 2014 | Sennheiser RS 120 Consumer Headphones

1 Answer

Sennheiser RS 120 headphones won't work, only hear static


Adjust the tuning wheel on the side of the headphones so it picks it up.

Mar 20, 2014 | Sennheiser RS 120 Consumer Headphones

1 Answer

Headphones Panasonic


if these are older headphones it's likely that the batteries have gone bad or are defective, if this is a new unit, (aside from returning it for working one) it could still be the batteries, but the other likely issue is the charging unit is defective. you could test with a volt meter to see if it's getting juice. you could also have a short in the headphones somewhere.

Dec 03, 2013 | Sennheiser RS 110 Consumer Headphones

1 Answer

THE HEADPHONES ARE CHARGED BUT WONT WORK. THERE IS A CONTIOUSE GREEN LIGHT WHICH IS ON. ON THE HEADPHONES.


Wireless? Are they connecting with the base? Try unplugging the base to reconnect. What are they connecting to? TV? computer? What?

Nov 10, 2012 | Sennheiser RS 120 Consumer Headphones

2 Answers

How do I charge batteries?


The headphones will automatically charge wirelessly when placed in the cradle that should have come with the package. To make sure the headphones are placed correctly, a red light should illuminate letting you know they are being charged and are properly placed.

May 03, 2011 | Sennheiser HDR 120 Consumer Headphones

2 Answers

No sound on left ear


I will assume you have tried tuning them via the control mounted on the headphones and still get nothing from the left ear.


First try a different channel setting on the base and retune the headphones.. if this doesn't fix it..


Check all your connections.. at the headphone base as well as the source.


Also I suggest trying them on a different source.


Since you did not mention what the source is.. I will make a few additional suggestions.


If plugged into an amplifier.. try repeated switching between output sources.. If the amp is playing fine through both speakers.. pick up an inexpensive adapter that will allow you to plug the red and white rca jacks into a headphone jack, then try HP output. (some RS 120 units shipped with this adapter)


If the source is the television itself check the connections on the back.. and check your balance settings on the sets main menu.


Depending on how old the headphones are along with frequency of use you may need new batteries.


Make sure the batteries are fully charged.. remove them and test the voltage.. they can do this for you at Radio Shack if you don't own a volt ohm meter or some other testing device.


Replacement batteries are not that expensive.. just make sure you replace them with the exact type (AAA - NiMH) and allow plenty of time for them to charge before use (overnight)


This last bit of advice I suggest caution.


You can put a fresh set of AAA standard batteries in the headphones and test them.. DO NOT PUT THE HEADPHONES ON THE CHARGING CRADLE with these batteries or you MAY DAMAGE THE HEADPHONES.


In fact I suggest you place a piece of tape or something on the cradle before you do this to remind you.. once you finish testing the headphones with standard non rechargeable batteries .. again trying different settings and tunings the set.. If they work .. you probably need a new set of rechargeable batteries..


This is a quick and dirty way of testing/comparing.. but REMOVE the standard batteries immediately after this test. Placing the headphones on the charging cradle with standard batteries in place could cause them to rupture and leak into the headphones.. so again.. be careful if you decide to test them in this fashion.


Good luck!

Feb 08, 2011 | Sennheiser RS 120 Consumer Headphones

1 Answer

No green On/Off light. Charge light is red. I hear only static.


Two things.. Check the batteries..
Also.. since these headphones have to have a signal sent to them to activate transmission (green light simply indicates they are receiving a signal) it can take a few moments after the signal begins to activate them.
I would hazard a guess that when you unplug the cables and then plug them back in.. the feedback that generates activates the base much the same as a regular audio signal would
Finally.. make sure the source is a fixed output.. if not.. and its variable..you will have to increase the output or volume to activate the base..

Good luck!

Jan 26, 2009 | Sennheiser RS 120 Consumer Headphones

2 Answers

My sennheiser 120 headphones are wearing out. After much use.


You can buy the HDR 120 model which is basically the headphones lone
These will work with the base in conjunction with the set you have now.. or as a replacement
You can also buy replaceable ear cups for less than 20 dollars (check the Sennheiser website)
Finally you may want to replace the rechargeable batteries in the headphones you have
Just make sure you replace them with the exact type.. I believe those are NiMh AAA
Pop them out and go to any Battery Plus or Radio Shack.. a new set probably run you less than 7 bucks
My point.. for less than 30 dollars you can have your old headphones working and looking like new ones
Give the new batteries an overnight charge before using them

Good luck

Jan 03, 2009 | Sennheiser RS 120 Consumer Headphones

1 Answer

I have the rs 120 plugged into power, the green light is on, I have the batteries in the headset, but I get no sound. The switch is on, the RC plugs into the back of the stereo, but no sound. Help, ps I...


http://www.sennheiserusa.com/serviceandsupport_downloadarea_active

You can get the PDF version of the instruction sheets here…

Since you did not go into detail about how you connected the headphones I will make some assumptions

If you plugged the RF connectors into the back of the amp.. make sure to note what that output is.. and that the output is selected on the amp. Then turn the sound on the amplifier up slowly.

The green light indicates you have some type of signal activating the headset.. if you have the headphones plugged into a tape out connection and your amp allows this connection to constantly act as a monitor.. you may be getting enough of a signal to activate the base.. but not enough of a signal to generate audio as that connection is a fixed signal and pretty much unamplified..

When experimenting with outputs on the amp.. remember to turn the amp off when switching connections.. and turn the volume down before turning it back on.. always turn the volume down between selecting outputs ..

Finally verify the headphones work by simply plugging them into a headphone jack..(if you did not get that connector you can pick one up at radio shack) and turning the volume up slowly on the amp..

Good luck

Dec 30, 2008 | Sennheiser RS 120 Consumer Headphones

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