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Listen’s Ultimate series of complete, stationary RF systems offers the best possible combination of features and performance in a one-purchase package.

Beginning with the LT-800 transmitter and four (4) of our LR-500 Portable, Programmable Display Receivers specific to the 216 MHz band, the LS-50-216 system is a feature-rich combination of components ideal for smaller venues looking to offer the best possible listening experience. Additionally, the included ear speakers, neck loops, and signage kit ensure that you meet compliance requirements immediately once the system is installed.

The multi-channel LR-500 receivers included with the LS-50-216 make the system ideal for applications such as language interpretation, training sessions, and more.


One (1) LT-800-216-01 RF Transmitter (216 MHz)
One (1) LA-102 Telescoping Top Mounted Antenna (216 MHz)
Four (4) LR-500-216 Portable Programmable 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-361 High Capacity AA Alkaline Batteries (2)
One (1) LA-304 Assistive Listening Notification Signage Kit


  • Feature-packed, multi-channel assistive listening system and all accessories
  • LR-500 Digital Display Receivers provide listeners with outstanding audio quality and the ability to manage channel selection
  • Capable of transmitting on up to 57 digital channels, each offering digital locking for reliable signal
  • Includes alkaline batteries, signage kit, and more
Configurations & Architectural Specs


LS-50-216 Listen Ultimate Level I Stationary RF System (216 MHz)
LS-50-072 Listen Ultimate Level I 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 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 receiver shall be programmable to electronically lock out unneeded channels. The receiver shall be capable of seeking channels. The device shall have a squelch. The device shall have an audio frequency response of 50 Hz to 15 KHz, ‘± 3 dB at 216 MHz . The device shall incorporate a stereo headset jack that allows the user to plug in either a mono or stereo headset and listen to audio normally. The device shall incorporate an LCD display that indicates channel, battery level, low battery, battery charging, RF signal strength and channel lock status. The receiver shall incorporate automatic battery charging circuitry for recharging of NiMH batteries. The device shall have a switch able option for the use of (2) alkaline or (2) NiMH batteries. Listen Technologies Corporation LS-50-216 products are specified.

Product Specifications


Shipping Weight10.0 (4.5)
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.
QWhat is the transmission range of the LS-50-216 system?
AUp to 750 ft. (228.6 m) with the included telescoping antenna (LA-102). For greater range up to 1,500 ft. (457.2 m) the universal antenna kit options found in the Level II and II Premiere systems.
QCan the LR-500 be used with multiple transmitters?
AYes. We recommend the LR-500 for use with multiple transmitters. The LR-500 is programmable and can be set to just those channels you need.
QHow many receivers can I have in a system?
AAs many as you need, the number is endless.
QHow many channels can I program into the LR-500?
AOne to 57. The receiver has 57 channels and you can program it to have just the channels you want to access. It can be a two channel receiver, a 12 channel receiver, or keep all channels.
QHow long do the batteries last on the LR-500 receiver?
AAlkaline batteries last 30 hours. NiMH rechargeable batteries last 15 hours (72 MHz and 216 MHz). With 863 MHz, Alkaline batteries last 20 hours and NiMH rechargeable batteries last 10 hours.
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.
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We've been impressed by the Listen system's ease of use (and installation), as well as its flexibility. The difference between your system and what we had been using is amazing. Patrons are happy and thus, so are we.

James D. Anderson
Director of Audio, McCallum Theater
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