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The foundation of our LS-49-216 Listen Premiere Level III Stationary RF System is the LT-800 RF Transmitter and our LR-400 Portable Display Receivers. Offering outstanding strength and clarity of signal, the LS-49 provides an outstanding listening experience for larger venues requiring range of up to 914.4 m (3,000 ft.).

Beyond these main components, the LS-49 includes everything needed to offer industry-leading assistive listening right away. The transmitter and receivers are combined with ear speakers, neck loops, a universal antenna kit and universal rack monting kit, rechargeable NiMH batteries (for receivers), charging/carrying case, signage kit, and more. The end result is a complete package that allows you to install, set up, and transmit assistive listening audio almost immediately.


One (1) LT-800-216-01 RF Transmitter (216 MHz)
One (1) LA-122 Universal Antenna Kit (72 MHz and 216 MHz)
One (1) LA-326 Universal Rack Mounting Kit
Four (4) LR-400-216 Portable Display RF Receiver (216 MHz)
Four (4) LA-164 Ear Speaker
Two (2) LA-166 Neck Loop
One (1) LPT-A107-B Dual RCA to Dual RCA Cable 2 m (6.6 ft.)
Four (4) LA-362 Rechargeable AA NiMH Batteries (2)
One (1) LA-317-01 4-Unit Portable RF Product Charging/Carrying Case
One (1) LA-304 Assistive Listening Notification Signage Kit


  • Complete 216 MHz RF system with receivers, accessories, and more
  • Includes LR-400 digital display receivers and rechargeable NiMH batteries
  • Charging/carrying case for easy distribution, charging, and storage
  • 57 available channels for flexibilty with reliable, digital signal
  • Superior audio quality thanks to 80 dB signal-to-noise ration (SNR)
  • Extended coverage range for larger venues
Configurations & Architectural Specs


LS-49-216 Listen Premiere Level III Stationary RF System (216 MHz)
LS-49-072 Listen Premiere Level III Stationary RF System (72 MHz)

Architectural Specs

Furnish and install an RF wireless assistive listening system for use by the hearing-impaired. The assistive listening system (ALS) shall be capable of broadcasting on 17 wide band channels and 40 narrow band channels and be frequency agile. The ALS system shall have 80 dB SNR or greater, end-to-end. The RF receiver shall be capable of receiving on 57 wide and narrow band channels.The receiver shall have a SNR of 80 dB or greater. The device shall be able to be locked on a single channel. The receiver shall be capable of seeking channels. The unit shall incorporate a multi-functional LED that indicates power, channel lock, low battery, and battery charging. The device shall have a programmable squelch. The device shall have an audio frequency response of 50 Hz – 15 kHz (‘±3 dB) at 216 MHz. The device shall incorporate a stereo earphone jack that allows the user to plug in either a mono or stereo earphone(s). The device shall incorporate an LCD display that indicates channel, battery level, low battery, battery charging, RF signal strength and channel lock status. The device shall be able to enable companding with the SQ function. The unit shall operate off of two (2) AA batteries; alkaline or NiMH. The receiver shall incorporate automatic battery charging circuitry for recharging of NiMH batteries. The device shall have a switchable option for the use of alkaline or NiMH batteries. Listen Technologies Corporation LS-49-216 products are specified.

Product Specifications


Shipping Weight29.0 (12.6)
QWhat is the function of SQ?
ATo reduce noise of the systems, Listen offers a noise reduction technology called ListenSQ™. Both the transmitter and receiver must have SQ on to achieve the desired results. If you are planning to use this product with older Listen systems or equipment not manufactured by Listen, you should disable SQ.
QCan I purchase additional LR-400-216 receivers for my LS-49-216 system?
AYes! Order as many as needed. The additional receivers will need an earphone (LA-164) or any other Listen earphones and batteries before being used.
QCan the LR-400 be used with multiple transmitters?
AYes. The LR-400 can be used with multiple transmitters, but unlike the LR-500, it cannot be programmed to lock out channels.
QWhat is the transmission range of the LS-49-216 system?
AUp to 3,000 ft. (914.4 m) with included universal antenna kit options.
QWhat is the difference between the LR-400 and the LR-500?
AThe LR-500 gives the user an opportunity to lockout unused channels and has the controls on the outside of the front door.
QWhat is squelching?
AThe purpose of squelch is to mute the audio output of your receiver when the signal from the transmitter is turned off or is too weak to be received. Without squelch you would hear radio noise in your earphone. The squelch function is preset and cannot be changed on the LR-300.
QHow many receivers can I have in a system?
AAs many as you need, the number is endless.
QWhat are the ADA changes related to assistive listening systems?
ASimply put, any public assembly area where audible communication is integral to the use of the space, an assistive listening system shall be provided. The assistive listening receivers need to comply with the following table below. For full details visit:
QIs there a limit to the number of transmitters I can use in one room?
AYes. The 72 MHz LT-800-072 has a maximum of (8) eight.
Related Products

The wide variety of devices able to be used in conjunction with the LR-400 was very helpful. I tested LA-164 ear speaker, the LA-166 inductive neck look as well as one of the user's earbuds. Highly Recommended.

Doug Watt
Managing Director, Musiclab Brisbane
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