20 Most Recent Sennheiser CX 400 Headphones Questions & Answers

Any foreign bodies inside the driver bay, or something magnetic? Just a thought.

Unless they've beed damaged though being overdriven

Sennheiser CX... | Answered on Jan 21, 2018

Hi golfergav66,

I see that you mentioned that you headset is only putting out Audio in Mono.

Manual check the manual link for the headset info, also you may need to check the settings of the Sound Card that you have to see if the setting from there is also set to Mono instead of stereo.

After checking Reviews about the Headphones that you have I believe the problem is not the headset but the source from what you are using, if the source where your are connecting the Headset is not capable of putting out Audio in stereo then the headset will also have a Mono output, Headsets do not have the capability to convert the output to stereo from any source.

On your Headset there are no Other Troubleshooting steps that can be done to produce a stereo output, but to check if the source produces a stereo output as well for the Headset to produce a stereo output. The stereo feature that your Headset has as what they say about the headset means that it basically is just a better Headset than any other that it can at least give more clarity with the Audio heard from it resulting into a much better quality than a regular headset but still does not make that big a difference since Audio still just is transferred from the source to you headset, it will only make a difference if your headset has it's own amplifier then I believe stereo Output can be adjusted and controlled on your headset for better performance and Audio output.

Unless there is something wrong with your headset, try going back to where you purchased it and try and see if a different headset of the same kind will be different from what you are experiencing on your headset.

You mentioned you replaced the cable but still there was no change at all right.

I hope that this clears things out.

Thank you for choosing Fixya,


Sennheiser CX... | Answered on Jun 22, 2011

yellow and red-green are most likely grounds. red is normally the right channel and green is normally the left channel. quick question though, why on earth would you cut the plug off of a pair of 75-90$ headphones?

Sennheiser CX... | Answered on Mar 18, 2011

try using other headphones to your unit, if it plays, the problem is in the CX400 indeed. usually caused by unintentional yanking & other factors, the internal of the wires were broken, it can be fixed yes, with patience and some soldering skills, just find the appropriate cable for that particular model, with imagination you can even use other headphone cables, ;-)

Sennheiser CX... | Answered on Feb 03, 2011

There is a break in the potentiometer ( volume controller) of the headset. Your carbon track or the contact sweeper is losing touch with the carbon track.
Replacement of the controller potentiometer is needed.

Sennheiser CX... | Answered on Sep 17, 2010

Hello Timothy, the microphone has a 3.5 mm connector, which has a thread, you must unscrew this thread and you should be able to exit
Discuss the type of connector you have
I hope you can solve the problem
Greetings Franco Dosil

Hola Timothy, el microfono tiene un conector de 3,5 mm, que tiene una rosca , debes desenroscar esta rosca y tendria que poder salir
Comenta el tipo de conector tiene
Espero puedas resolver el problema
Saludos Franco Dosil

Sennheiser Audio... | Answered on Jun 21, 2019

Hi David, comment that cables are wrong in the transmitter, to try to find the best possible solution
I wait your answer
Greetings Franco Dosil

Hola David, comenta que cables estan mal en el transmisor, para tratar de encontrar la mejor solucion posible
Espero tu respuesta
Saludos Franco Dosil

Sennheiser Audio... | Answered on Jun 07, 2019

Hello Mike, your LG TV, does not have a headphone output, it only has optical fiber audio output
the options that I suggest are,
1) Connect the optical fiber output of the LG, to an AV receiver, that has said input and place the headphones in this equipment,
2) Buy an optical fiber to audio converter by RCA L and R and this is connected to a headphone amplifier
I send you links to the products that are sold in my country
I hope you solve your concern
Greetings Franco Dosil
This is the headphone amplifier
This is the optical fiber to audio converter by RCA L and R

Hola Mike, tu TV LG, no cuenta con salida de auriculares, solamente tiene salida de audio por fibra ?ptica
las opciones que te sugiero son,
1) Conectar la salida de fibra ?ptica del LG, a un receptor AV, que cuente con dicha entrada y colocar los auriculares en este equipo,
2) Comprar un conversor de fibra ?ptica a audio por RCA L y R y este conectarlo a un amplificador para auriculares
Te env?o links de los productos que se venden en mi pa?s
Espero logres resolver tu inquietud
Saludos Franco Dosil
este es el amplificador de auriculares
Este es el conversor de fibra ?ptica a audio por RCA L y R

This is the headphone amplifier
Este es el amplificador de auriculares

This is the fiber optic to analog audio converter
Este es el conversor de fibra ?ptica a audio por RCA L y R

Sennheiser Audio... | Answered on May 01, 2019

Hi Edgar, it is important that the receiver works, because there is a dialogue between the transmitter and the receiver to confirm that they are on the same frequency, that is why the transmitter is blinking, you should repair the receiver and look for the frequency or channel that the transmitter is found and it will stop flashing

Hola Edgar, es importante que el receptor funcione, porque hay un dialogo entre el transmisor y el receptor para confirmar que est?n en la misma frecuencia, por eso es que el transmisor esta titilando, deber?as reparar el receptor y as? buscar la frecuencia o canal que se encuentra el transmisor y este dejara de titilar

Sennheiser Audio... | Answered on Apr 15, 2019

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