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Sennheiser SET 840 S

Hearing aid-compatible wireless TV listening system

28 Reviews | 3 questions - 4 answers

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Item # 143SET840S

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Sennheiser SET 840 S




Our take on the Sennheiser SET 840 S

Sennheiser designed this wireless TV listening system especially for folks who wear hearing aids. The included transmitter connects to your TV or audio system and sends a clear audio signal wirelessly to the receiver, covering a range of up to 100 feet. The receiver comes with a lanyard to hang around your neck, and it can pass the audio signals to your hearing aid wirelessly.

wireless receiver

The wireless receiver hangs around your neck and can pass audio signals to your hearing aid.

Hear TV shows and movies clearly

Sennheiser designed this wireless TV listening system especially for folks who wear hearing aids. The included transmitter connects to your TV or audio system and sends a clear audio signal wirelessly to the receiver, covering a range of up to 100 feet. The receiver comes with a lanyard to hang around your neck, and it can pass the audio signals to your hearing aid wirelessly.

Plug in a pair of headphones

The receiver also has a headphone mini jack so you can listen to your TV shows, movies, and music through your favorite headphones. It features a large, easy-to-read volume control and a rechargeable battery that lasts up to nine hours on a single charge. The transmitter automatically turns off when not in use.

Makes speech easier to understand

This system is dialed-in to improve the sound of speech. It makes the dialogue in shows, movies, or the news clearer and easier to hear. At the push of a button, you can also set the transmitter to suit your listening preference — like boosting treble. Use the balance control to fine tune the amount of volume in the left or right ear. 

Product Highlights:

  • designed especially for wearers of hearing aids
  • compatible with hearing aids that feature a built-in induction coil (T-coil)
  • selectable hearing settings include optimized speech intelligibility and treble emphasis
  • headphone mini jack accommodates most kinds of headphones
  • RF wireless transmitter range: up to 100 feet
  • receiver includes volume and balance controls, and automatically turns on/off with wear
  • automatic tuning
  • frequency response: 50-16,000 Hz
  • rechargeable battery (included) provides up to 9 hours of operation
  • transmitter connects to TV via headphone jack or RCA stereo inputs
  • includes lanyard, wireless induction loop, and full-sized headphone adapter
  • weight: 1.8 oz. for receiver; 8.8 oz. for transmitter
  • warranty: 2 years
  • Our 60-day money-back guarantee

What's in the Box:

  • Transmitter/charging base
  • Wireless receiver
  • Induction loop
  • Microphone (with attached 48" cable terminated by a 3.5mm connector)
  • AC power supply (with attached 6.5' DC cord)
  • Two-prong AC plug
  • Lanyard
  • 7' Stereo minijack cable
  • 11" Minijack-to-RCA adapter (with female 3.5mm connector on one end and male stereo RCA connectors on other end)
  • 1/8" to 1/4" adapter
  • Instruction Manual
  • Installation diagram

Scratch & Dent items may be missing non-essential accessories. In some cases the manufacturer's accessories have been replaced with generic equivalents.

Featured Video

Works very well. Make sure it will work with your hearing aids before buying. My wife's audiologist has to adjust her aids to let them shake hands with the product. She loved it

Joel, Davis, CA


Sennheiser SET 840 S Reviews

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(28 Reviews)
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Product Research



Overview: The Sennheiser Set 840-S is an RF stereo TV listening system and is especially suited for those who wear hearing aids with a built-in induction coil (t-coil). Easily connected to a TV, hi-fi system or radio, the Set 840-S produces excellent sound, transmitted from the receiver to the hearing aid via wireless induction using the included induction loop. Alternatively, you can connect headphones or induction couplers to the lightweight clip-on receiver.

T-Coils: A t-coil (or telecoil) is a very small coil of wire built within some hearing aids that serve as an antenna. It can be activated by a switch on the hearing aid when it is set to the "T" position. Hearing aids with t-coils allow the wearer to have much clearer hearing without feedback. To create the proper magnetic field, a personal induction loop (such as the one included with the Set 840-S) or a larger, full room loop is needed. Approximately 30% of hearing aids in the US have t-coils.

RF Wireless Range: The Sennheiser Set 840-S provides a wireless mobility range of up to 100 feet. It can transmit through walls, so you don't have to be in the same room as your TV or audio system.

RF wireless receiver: The RF wireless receiver features a stethoscope design. The receiver is ideal for connection to hearing aids with a T setting using the included induction loop or headphones (with a 3.5mm jack).

RF Transmitter/Charging Station: The RF transmitter/charging station connects to your television and then wirelessly transmits a stereo audio signal to the stethoscope-style wireless receiver. The RF transmitter/charging station also recharges the integrated battery inside the wireless receiver when they are placed on the base.

System Connections: The included RF transmitter/charging station features a 3.5mm input to connect to your television's audio or headphone output using the supplied stereo minijack cable, minijack-to-RCA cable, or 1/4" adapter.

Microphone: The Sennheiser Set 840-S comes supplied with an external microphone which picks up the television's audio from the TV's built-in speaker. The microphone plugs into the 3.5mm audio input on the back of the RF transmitter/charging base and then is placed near the speaker of the television.

Auto Tuning: The wireless receiver automatically searches for one of the 3 channels (925.95, 926.8, 927.5 MHz) of the transmitter to tune in your television's audio.

Ergonomic Controls: Ergonomic controls and visual feedback of certain operations make the Set 840-S easy to use. There is a large, ergonomic volume control on the stethoscope-style receiver to adjust volume level. There is also a balance control on the receiver to adjust the balance so that you hear equally well with both ears.

Three Selectable Hearing Settings: The Sennheiser Set 840-S offers 3 selectable hearing settings on the transmitter. These settings optimize speech intelligibility due to switchable compression and treble emphasis.

Auto Power: The RF wireless receiver automatically turns-on when you place them on your ears and automatically turns-off when you take them out (after 30 seconds). If you are not within the range of the transmitter, the receiver automatically switches off after 3 minutes.

Power Supply: The RF wireless receiver features an integrated lithium-polymer battery to ensure a long operating time of up to 9 hours. The receiver charges when it is rested on the transmitter/charging station (up to 3 hours). It can be placed in the transmitter's charging compartment facing in either direction. The transmitter/charging station operates off of standard AC household current using the supplied AC power adapter.


  • Modulation: FM, stereo
  • Carrier Frequency: 925.95, 926.8, 927.5 MHz
  • Range: up to 100'
  • Frequency Response: 50-16,000 Hz
  • THD: <1% (1kHz)
  • Signal-to-Noise Ratio: 70 dB (A)
  • Operating Time: up to 9 hours
  • Charging Time: approximately 3 hours

Our Product Research Team

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Customer Q&A

Crutchfield asked  
Why did you buy this?

Saw in Consumer's Report [ Steven  Jun 28, 2018 ]
LOOKS GOOD [ RICHARD  Dec 22, 2016 ]
Spoke with Marshall regarding my needs. He was most helpful! [ Kimberly  Dec 10, 2016 ]
have one, love it, needed another [ carol  Sep 07, 2016 ]
To hear TV [ Maurice  Jun 13, 2016 ]
Unable to understand TV at any volume. The SET 840 S enabled me to now watch TV and clearly hear and understand every word. I am using Bose Ear Buds. [ Karen  Dec 06, 2015 ]

3 questions already asked

I have mine connected to my cable box because my TV also has a Digital Optical Audio Out. I called the company and they told me to get an REI Digital to Analog Encoder, but it did not work. The cable connection works. [ Lori  May 09, 2017 ]
Not sure if this is helpful, but we hooked ours up directly to the cable box. [ louise  May 08, 2017 ]
The 1/8" jack on your TV is likely the headphone output (and this is why it shuts off the regular speakers). If your TV features a set of RCA outputs, then that would be the best method for connecting this unit using the supplied RCA to mini adapter. If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can walk you through the settings on the product and see if there may be a fix. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer. You can also post your question in our forums: Or try our online support center: [ Jeff  Dec 12, 2013 ]  Staff