We have purchased sennheiser RS 120 wireless headphones but find our LG tv model 32LS3450 - TA does not have audio out, is there a solution?

I used an 1/8 inch male plug into tv and then into headphone xmtr.
amazon has lall cables and adapters.

here is link to instructions
copy and paste

https://fccid.io/ANATEL/00916-12-07356/Manual/43CEE361-CE0E-4C13-998C-DDDC6A4E2E2C
https://en-au.sennheiser.com/how-do-i-set-up-the-rs-120-wireless-headphones
https://www.youtube.com/watch?v=IkEGgXD__NI

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
https://articulo.mercadolibre.com.ar/MLA-784156450-behringer-ma400-ultra-compact-monitor-auricular-amplificador-_JM

This is the fiber optic to analog audio converter
Este es el conversor de fibra ?ptica a audio por RCA L y R
https://articulo.mercadolibre.com.ar/MLA-707192478-convertidor-audio-digital-toslink-optico-coaxial-a-rca-nuevo-_JM

Probably yes, connecting the RS transmitter to the composite audio output jacks (L/R) on the back of the Vizio TV.

The television audio out is the way to connect them. If you connect them to the cable box you may have audio lag.

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

Yes

Broken audio cable entering the transmitter or audio jack plug.

Power supply plug loose / faulty power supply.

Ok.. first.. the simple thing is to go into your television menu and turn the television speaker OFF.
Then exit the menu and turn the volume up.. try your headphones now.

Next.. check the back of the TV for a FIXED AUDIO OUT.. plut your headphones into these outputs.. if you have these.. you can simply turn the set down.. and use the volume control on the headphones.

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