Free Shipping on all orders $35 and up
We offer standard delivery in 3 business days or less.
Most orders received by 5PM ET (M-F) ship the same day.
Please see our shipping map below for estimated times.
Estimated standard delivery time to the U.S. and Puerto Rico
Delivery time estimates do not apply to large or heavy items that require special shipping (including most TVs), items shipped directly from the manufacturer, or out-of-stock items. Some items that ship from the manufacturer can only be delivered to addresses within the 48 contiguous states.
Delivery time for standard shipping to any of the 50 U.S. states or Puerto Rico is 1-3 business days. Saturday, Sunday and national holidays are not considered business days for delivery purposes.
Why Choose Crutchfield?
Great gear and expert advice
Our experts help you pick the ideal gear for your needs.
Meet our advisorsSupported forever
Free tech support for the life of your gear.
Read about our one-on-one expert help60-day returns
You may return items that are complete and like new for any reason within 60 days.
See the details of our return policyCrutchfield Rewards
Earn one point for every dollar you spend and use those points to save on future purchases.
Get full details on Crutchfield RewardsDeep discounts on car installation gear
We offer vehicle-specific installation instructions, dash kits, wiring harnesses, and speaker accessories at deeply discounted prices with car stereo and speaker purchases. Available for most vehicles.
Learn moreTrusted since 1974
Our customers have trusted us with their business, and they’ve helped us win awards for our service.
Check out our most recent awardsFactory-authorized dealer
The manufacturer’s warranty always applies.
See more detailsSennheiser SET 840 S
Hearing aid-compatible wireless TV listening system
Our take on the Sennheiser SET 840 S by Crutchfield's Kristen Schaub
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.
This product works very well and is easy to set up. A great plus is that it works with my several other Sennheiser RS 130 which I have on several TV sets in my house and all I have to do is carry the loop with me when shifting areas.
Old Salt, Illinois
Featured Video:
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
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
Sennheiser SET 840 S Reviews
Average Customer Review(s):
Thanks for submitting your review
Customer photos
Hands-on research
Product Research
Features
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.
Specifications
- 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
At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.
Customer Q&A
Crutchfield asked
Why did you buy this?
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
You can use any earphones...I use Bose [ Lori May 09, 2017 ]
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: http://community.crutchfield.com. Or try our online support center: http://crutchfield.custhelp.com/app/answers/list/kw/. [ Jeff Dec 12, 2013 ] Staff