Differences Between Assistive Listening Products

Sennheiser offers a range of wireless headset options that utilize a variety of audio transmission signals (Infrared and Radio Frequency) and a variety of wearing styles to suit different wearing preferences.

These headsets can be connected via a 3.5 mm plug into a dedicated headphone jack (which will often cut sound to the external speakers) OR to the RED & WHITE RCA audio output jacks (often found on the back of the TV, cable box, receiver, DVR, etc) and when connected in this manner they will allow for operation of both the headphones and the external speakers. All models offer unique functions yet will be able to provide an excellent listening experience and personal preference will play a large part in selection.

Our range of wireless headphones can be seen on our website here

NOTE: We do NOT recommend Bluetooth headsets for applications like TV watching as the latency (time it takes for a Bluetooth signal to be transmitted) that is inherent to all Bluetooth devices causes the audio to be out of sync with the video.

A few quick differences to keep in mind when choosing:

- Set 900 -

  • Infrared transmission - must be line of sight to the transmitter to work.
  • Incorporates increased audio intelligibility where the frequencies of the human vocal range are enhanced to make dialogue stand out from background noise and and hence dialogue is more distinct.
  • Incorporates built in microphones to increase ambient sound and built in pre-set audio adjustment levels to adjust for different types of hearing loss.
  • Volume to each ear can be adjusted independently and the transmitter can be set to stereo or mono sound.


- Set 840 TV -

  • Radio Frequency transmission - you don't have to be line of sight to the transmitter and can move around within the range of the transmitter.
  • Incorporates increased audio intelligibility where the frequencies of the human vocal range are enhanced to make dialogue stand out from background noise and and hence dialogue is more distinct.
  • Incorporates built in pre-set audio adjustment levels to adjust for different types of hearing loss.
  • Volume to each ear can be adjusted independently and the transmitter can be set to stereo or mono sound.


- Set 840 S -

  • Radio Frequency transmission - you don't have to be line of sight to the transmitter and can move around within the range of the transmitter.
  • Incorporates increased audio intelligibility where the frequencies of the human vocal range are enhanced to make dialogue stand out from background noise and and hence dialogue is more distinct.
  • Utilizes induction loop technology to work specifically with Hearing Aids.
  • Incorporates built in pre-set audio adjustment levels to adjust for different types of hearing loss.
  • Volume to each ear can be adjusted independently and the transmitter can be set to stereo or mono sound.


- Set 830 TV -

  • Infrared transmission - must be line of sight to the transmitter to work.
  • Incorporates increased audio intelligibility where the frequencies of the human vocal range are enhanced to make dialogue stand out from background noise and and hence dialogue is more distinct.
  • Incorporates built in preset audio adjustment levels to adjust for different types of hearing loss.
  • Volume to each ear can be adjusted independently and the transmitter can be set to stereo or mono sound.


- Set 830 S -

  • Infrared transmission - must be line of sight to the transmitter to work.
  • Incorporates increased audio intelligibility where the frequencies of the human vocal range are enhanced to make dialogue stand out from background noise and and hence dialogue is more distinct.
  • Utilizes induction loop technology to work specifically with Hearing Aids.
  • Incorporates built in pre-set audio adjustment levels to adjust for different types of hearing loss.
  • Volume to each ear can be adjusted independently and the transmitter can be set to stereo or mono sound.

NOTE: On the Set 830 S and the Set 840 S the induction loop can be replaced with a set of wired headphones to allow for more wearing options. This means that there is a wire from the headphones to the wireless receiver but you are wireless from your audio source.


- IS 410 -

  • Infrared transmission - must be line of sight to the transmitter to work.
  • Incorporates a compression feature that compresses background noise to allow dialog to become more distinct.

- A 200 -

  • No wireless signal transmission - Personal amplifier that amplifies ambient sound and makes it louder but does not receive a signal directly from an audio source via wireless transmission.
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  • 03-Jul-2015
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