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Overview

Perfect for single-channel applications including language interpretation, personal use, and assistive listening, the LS-48 Level II Stationary RF System has everything needed for a compliant audio system. The combination of our LT-800 transmitter and LR-400 receivers provides a solid foundation for meeting legislative requirements while offering a high-end listening experience. Additonal equipment, including the universal antenna kit, signage kit, and more make the LS-48 a complete package for immediately and effectively incorporating assistive listening into your venue.

Includes

One (1) LT-800-072-01 RF Transmitter (72 MHz)
One (1) LA-122 Universal Antenna Kit (72 MHz and 216 MHz)
One (1) LA-326 Universal Rack Mounting Kit
Four (4) LR-400-072 Portable Display RF Receiver (72 MHz)
Four (4) LA-164 Ear Speaker
Two (2) LA-166 Neck Loop
One (1) LPT-A107-B Dual RCA to Dual RCA Cable 6.6 ft. (2 m)
Four (4) LA-361 High Capacity AA Alkaline Batteries (2)
One (1) LA-304 Assistive Listening Notification Signage Kit

Highlights

  • Ensures public venues deliver an enriched listening experience while meeting new legislative requirements for assistive listening
  • Superior audio quality – 80 dB signal-to-noise ratio (SNR), setting the industry’s sound quality standard
  • Offers 57 digital channels – Listen receivers are digitally-tuned so the transmission won’t drift
  • Look & Listen™ LCD shows channel, battery status, and signal strength
  • Long transmission range ensures coverage for the entire venue
Configurations & Architectural Specs

Configurations

LS-48-072 Listen Premiere Level II Stationary RF System (72 MHz)
LS-48-216 Listen Premiere Level II Stationary RF System (216 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 72 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-48-072 products are specified.

Product Specifications
SpecificationLS-48-072

Physical

Shipping Weight24.0 (10.3)
FAQ
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-48-072 system?
AUp to 305 m (1,000 ft.) the included universal antenna kit options.
QCan I purchase additional LR-400-072 receivers for my LS-48-072 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.
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.
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 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: http://www.ada.gov/2010ADAstandards_index.htm
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.

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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