Question about Sennheiser RS 120 Consumer Headphones

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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 did not get a user's manual, it was a CHristmas gift and was purchased from DAKMART.com

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  • s2rdoe10 Jan 12, 2009

    Exactly the same problem.

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  • 155 Answers

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

Posted on Jul 07, 2009

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I can only get static on my rs 120 head phones


Sennheiser remote/cordless headphones are ordinarily very dependable. From your description it sounds like the problem is with the base unit. Try power-cycling the base with the headphones sitting on the charger cradle (red charging light must be on when you do this) - Unplug the power cord for about 10 or 15 seconds then plug it back in. This action should cause the base and the headset to go through the automatic pairing process. Once the base is paired with the headset, it should begin working again. Check also the channel pushbutton on one of the headphones. Hope this helps!!

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

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if you have the headphones plugged directly into the audio out, then thats the problem. the audio only supplies a low volume, pre-amplifier output and this needs to be put through an amp of somekind to get a decent volume. Look for a headphone socket on the tv, usually near the s-video plug and coloured green.

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This is caused by a power surge. To correct, plug your headset into charge, and then plug into power strip. Trip the switch on the power strip to off. It will cause a drain and turn off your green light and then allow the headset to turn back on.

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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..

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I have had no trouble with mine (3+ months of good use) until today. Same problem you had - green light won't go out, unit won't turn on. Jonsumer's solution got me to thinking, and this worked for me:

1. plug the charger into the wall.
2. plug the headset into the charger.
3. unplug the headset from the wall.

Plugging & unplugging the headset to charger multiple times had NO effect. It was only when I plugged it into the charger and unplugged the charger from the wall that the green light turned off and the headset began to work normally.

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1 Answer

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It sounds as if you are plugging the base into a standard headphone jack located on the Television set.

RCA Headphone jacks (incl mini) automatically stop the sound output to the main speakers on almost every set I have seen.. or home stereo.. etc etc

In other words you can take a standard RCA jack.. with nothing connected to it.. plug it in while the music or sound is coming out the main speaker.. and it will cut off the output to those speakers..

If you set has audio outputs on the back.. preferably Fixed Audio Out .. you will need to connect your base unit to those.. turn your set volume to 0 and adjust the headset volume using the control on the right ear-cup.

If you have variable audio out.. you will need to go into your TV sets setup menu.. turn off the speaker.. and turn up the set until you achieve a signal and decent volume through the headset.

If you are missing these connections.. your current “work around” is your only solution.

Best of luck

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It sounds like you need to re-register the earpiece to the base. To do this, use the following steps:
1. Return the headset to the
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2. Press and hold both the
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on the back of base unit for a
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3. Press and hold the Headset
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4. Subscription completion is
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5. If subscription fails within 2
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A modulator is designed for the reverse of what you are trying to use it for. It is meant to be a local TV transmitter i.e. video and audio source INPUT for the TV. It converts A/V to a UHF radio signal that the TV can receive. If the TV has no audio OUTPUTS or headphone jack then headphones cannot be used with this TV. As for the new problem with the TV, I'd like to think this is co-incidental and not your fault. The fantastic thing to do would be to go and buy the lady an LCD TV of a the biggest size you can afford. Most have a headphone socket.

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Larry, The green power automatically detects the source when you plug it in. If the volume is too low or non-existent (under-modulation) the green light automatically switches off in 10 minutes after you've plugged the transmitter into the source. At least that's what the manual says. It should work with a laptop.

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