Sennheiser RS 120 Troubleshooting
This page will contain issues that consumers may come across with this product.
No Audio Output
The headphones won’t produce any sound.
Make sure the two AAA batteries are placed correctly and that the headphones’ power is turned on. If the device doesn’t produce any sound and that the transmitter appears to be working properly then one or both or the batteries may be dead so they have to be replaced with new batteries. Please refer to this guide to replace the batteries.
Broken Audio Cable
There is an audio cable that connects to the transmitter. If this wire is damaged then sound may not travel thus no sound being produced through them.
Make sure the batteries are properly placed and the device is on. If the batteries are good but the device won't produce any sound from either speaker, then the speakers in either ear may be faulty and may need to be replaced.
Sound Quality is Diminished
The sound is not clear. It may be static or patchy.
The Device and Transmitter are on Different Frequencies
The transmitter sends out a radio frequency that is received by the headphones; if the frequencies on the transmitter and the receiver on the headphones aren’t properly synced/tuned then the sound quality will be distorted. To solve this there is a tuner dial on the right side of the headset to adjust the frequency. Slowly turn the dial and listen for any changes. If the sound gets clearer, that tells us that the frequencies are lined up at that point, indicating it is properly tuned.
There is Interference with the Radio Frequency
If the headset and the transmitter are a certain distance apart or if there are mediums, as in, walls, in the way then that can serve as some interference which will reduce sound quality to the headset. Also, if you are near other devices that produce radio frequencies or near a radio tower, then the frequency that is output by the device or tower will cause interference with your transmitter-to-headset connection. To resolve this, try moving closer to the device and eliminate any other source of interference to see if that will improve the sound quality.
Sound Cuts in and Out / Distorted Audio
RCA Auxiliary Adapter Connection
The auxiliary adapter may not be plugged into the audio-playing device port completely, and as a result, it will have a patchy connection. Check to make sure that the RCA cables are plugged into the adapter correctly. If that doesn’t solve the issue, you may need to look into replacing adapter.
There is Radio Interference
See “There is Interference with the Radio Frequency” under Sound Quality is Diminished
Transmitter Is Not Powering On
Transmitter does not operate.
The Power Cord is Not Plugged In
Unlike the headset, the transmitter is not battery operated. It needs to be plugged into an outlet through its power cord. Be sure to check if it is plugged in properly.
The Power Cord is Broken
If the power cord is broken then the transmitter will not be able to turn on. This will result in no signal being sent and thus no audio being transmitted. The headphones will still make a static noise, just will not receive any transmission from your audio player. To solve this issue, the power cord will need to be replaced.
Audio is one-sided in strength / existence.
One Speaker is Damaged
If there is audio in one ear but not the other or if the audio output is weakened, it could be the result of a damaged speaker. If a speaker is damaged then the sound quality in that ear won't be completely functional. To fix this the speaker in the ear would have to be replaced. See Faulty Speakers.
A Wire is Damaged
If there is audio in one ear but not the other or if the audio output is weakened, it may just be a faulty RCA cable. One of these being damaged could result in disproportionate sound output.