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Overview

For larger venues, the LS-45 Classic Level II Stationary RF System makes it easy to install and operate a compliant assistive listening setup in no time. Designed for use in larger venues, the LS-45 provides a coverage range of up to 1,500 ft (457.2 m) with 17 wide-band digital channels. The included LR-300 receivers are digitally tuned to ensure a strong, reliable signal at all times, and each receiver benefits from our Super Quiet Companding Technology that offers 20 dB less noise than competitors’ receivers. The transmitter is compatible with nearly any audio source thanks to universal inputs, and the package includes everything needed to meet compliance requirements right away.

The LS-45 is available for the 72 MHz band only.

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-300-072 Portable Digital RF Receiver (72 MHz)
Four (4) LA-164 Ear Speaker
Two (2) Neck Loop
One (1) LPT-A107A-B Dual RCA to Dual RCA Cable 6.t 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 17 wide band 100% digital channels – Listen receivers are digitally-tuned so the transmission won’t drift
  • Long transmission range ensures coverage for the entire venue
Configurations & Architectural Specs

Configurations

LS-45-072 Listen Classic Level II 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 17 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 unit shall incorporate a multi-functional LED that indicates power, channel lock, low battery, and battery charging. The receiver shall be capable of seeking channels. 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 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-45-072 products are specified.

Product Specifications
SpecificationLS-45-072

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-45-072 system?
AUp to 305 m (1,000 ft.) using universal antenna kit options.
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.
QWhat is the difference between the LR-300 and the LR-400 receiver?
AThe LR-400 is more "user friendly" because it has the LCD Display, which will show the channel selection, battery life and signal strength. The LR-400 also has an adjustable squelch setting.
QDoes this receiver sound as good as your other receivers, which are more expensive?
AYes, all Listen receivers have the same superior audio quality (20 dB less hiss than any other competitor).
QHow do I SEEK for a new channel?
AIf you hold down SEEK momentarily, the receiver will search for the nearest channel in use.
QHow do I lock the SEEK function?
AHolding SEEK for longer than 4 seconds will lock the receiver on the current channel. When SEEK has been locked, the SEEK function is no longer useable until the same process is achieved to unlock the unit. The LED on the top of the device will blink if the unit is locked and requested to SEEK another channel.
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.
QCan I purchase additional LR-300-072 receivers for my LS-45-072 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.

The Listen Technologies assistive listening system was selected for its flexibility, which allows parts and pieces to be utilized in a range of meetings, conventions, as well as at arena events. We are committed to giving our guests the best experience possible while visiting our facilities and Listen Technologies is an important part of that service.

Christy Harris
Sr. Vice President Administration, Qwest Center, Omaha NE
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