Listen Technologies LA-201, LR-600, LR-600-072, LR-600-216 User Manual

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LR-600Wireless Speaker/Receiver

Specify Part



Use Listen®’sLR-600Wireless Speaker/Receiver in classrooms, houses of worship, as a portable sound system, and anywhere you need to get sound to a location without wires.


All-in-onewireless receiver,2-channel10 watt power amplifier, and speaker.

Exceptional audio quality – 80dB signal-to-noise.

Users can adjust volume and select channels on the top of the unit.

Operates on power supply, external 12VAC or internal batteries. (AC power supply included)

Easily field tunable; select from 57 channels with the simple push of a button.

Built in SmartCharge™ won’t allow batteries to overcharge! Charging circuitry is conveniently built into Listen’s receivers; never worry about unplugging a transformer at a certain time.

Adjustable squelch mutes audio when RF signal is not present.

Auxiliary input and output connections allows for connection to external equipment.

Audio input allows for mixing in additional audio sources such as projectors, a CD or MP3 player.

Handle can be used to carry the unit, to mount on vertical or horizontal surface or to mount on a microphone stand.

One Listen Expansion Speaker (Part Number LA-316)or any other speaker may be powered by oneLR-600for twice the coverage.

Listen’s backlit LCD display is built into the back of the LR-600speaker to verify channel selection, programming and RF signal strength.

The programming feature gives the system manager the ability to lock onto one channel to prevent users from changing channels.

Listen Technologies Corporation

14912 Heritage Crest Way

Salt Lake City, UT 84065-4818U.S.A. Phone: 1.801.233.8992 or 1.800.330.0891 Fax: 1.801.233.8995


User Applications

overflow areas

foyers and lobbies

dressing rooms


outdoor pavilion



sports bars

judges chambers


houses of worship

cafeteria areas

meeting rooms

convention centers

training facilities

indoor or outdoor tour areas

tour groups

school excursions

cruise ships

trade shows





and many more!

updated 10.21.05

Listen® and the Listen logo are registered trademarks of Listen Technologies Corporation

LR-600Wireless Speaker
























2 *





















Close up of top





control panel

Close up of back panel

Hand held soundfield!


1.Top mounted channel selection and volume controls for easy access.

2.Operates on 15VAC power supply (LA-201,included), 12VDC, or internal eight AA battery pack. Can also be used with Listen NiMH Rechargeable AA Batteries(LA-362).*

3.Unbalanced auxiliary phono input and output ports.

4.Adjustable handle/mounting bracket. Includes leatherette wrap for hand held use. Leatherette wrap may be removed to mount unit on a wall or ceiling (screws and hollow wall anchors included) or on a microphone stand (16mm nut included). Handle angle can be adjusted 360°.

5.15/10 Watt (peak/RMS) continuous power with 4 Ohm load, 2-wayspeaker. Can also drive a separateLA-316Expansion Speaker.

6.When enabled, SQ™ technology provides highest audio quality available in its product category. SQ can be disabled for compatibility with other assistive listening equipment.

7.LR-600works with Listen’sLT-800Stationary orLT-700Portable FM Transmitter; it is also compatible with all other major ALS transmitters.

8.Backlit Look&Listen™ LCD Display indicates channel selected as well as electronic lock status. UP, DOWN, and SEEK buttons tune to 57 channels. Unit can be programmed to show only the channels in use.

9.Adjustable three-bandequalizer.

10.Internal antenna. For longer range applications, add a Listen 90 Degree Helical or other Listen remote antenna (external antennas sold separately).

*batteries sold separately.

Don't miss a single sound.

Listen Technologies Corporation

Phone: 1.801.233.8992 or 1.800.330.0891

14912 Heritage Crest Way

Fax: 1.801.233.8995


Salt Lake City, UT 84065-4818U.S.A.


updated 10.21.05



LR-600Wireless Speaker Accessories



Expansion Speaker





Antenna Kit

The single solution for all of your indoor remote antenna needs. Includes: 72 and 216 MHz components; flexible and rigid dipoles and monopole radials; hardware for multiple mounting configurations; and 25 feet (7.6 m) of RG58 coax cable.

90 Degree Helical

(Rear Mount) LA-123for 72 MHz orLA-124for 216 MHz)

216MHz Ground


(Remote Mount) LA-107for 216 MHz Designed for outdoor installation

LA-316Expansion Speaker

72 & 216 MHz Guidelines

72 MHz: • Compatibility with other assistive listening products.

More simultaneous channels (up to six).

216 MHz: • Longer range

(up to 3,000 feet or 900 meters).

Avoiding interference problems at 72 MHz.

Architectural Specifications

The FM speaker/receiver shall be capable of receiving on 57 wide and narrow band channels at 72 or 216 MHz. The device shall have an adjustable squelch. The device will incorporate an LCD Display that indicates channel and RF signal strength. The device shall have an internal antenna and a BNC connector for an external remote antenna. The speaker/receiver shall have 10 watts RMS output power and have a frequency response of 63 Hz to 15 KHz, ±3dB (10 kHz, ±3 dB at 216 MHz). The signal to noise ratio shall be 80 dB or greater. The device shall be capable of being operated on a power supply external 12 VDC or internal batteries. The Listen LR-600is specified.


Listen Technologies Corporation (Listen®) warrants its receiver(LR-600)to be free from defects in workmanship and material under normal use and conditions for the useful lifetime of the product from date of purchase. This warranty is only available to the original end purchaser of the product and cannot be transferred. Warranty is only valid if warranty card has been returned within 90 days of purchase. This warranty is void if damage occurred because of misuse or if the product has been repaired or modified by anyone other than a factory authorized service technician. Warranty does not cover normal wear and tear on the product or any other physical damage unless the damage was the result of a manufacturing defect. Listen is not liable for consequential damages due to any failure of equipment to perform as intended. Listen shall bear no responsibility or obligation with respect to the manner of use of any equipment sold by it. Listen specifically disclaims and negates any warranty of merchantability or fitness of use of such equipment including, without limitation, any warranty that the use of such equipment for any purpose will comply with applicable laws and regulations. The terms of the warranty are governed by the laws of the state of Utah, U.S.A. Listen will only accept returned products with prepaid shipping and with a return merchandise authorization number. To receive a return merchandise authorization number call 1.800.330.0891 or 1.801.233.8992. Please see or contact Listen for complete warranty details.

Don't miss a single sound.

Listen Technologies Corporation

Phone: 1.801.233.8992 or 1.800.330.0891

14912 Heritage Crest Way

Fax: 1.801.233.8995


Salt Lake City, UT 84065-4818U.S.A.





updated 10.21.05



LR-600Wireless Speaker


72 MHz

216 MHz



RF Frequency Range

72.025 - 75.950 MHz

216.025 - 216.975 MHz



Number of Channels

57 (17 wide, 40 narrow)

57 (19 wide, 38 narrow)




.6uV typical, 1 uV maximum for 12dB SINAD



Frequency Accuracy

± .005% stability -10°to 40° C (14° to 104° F)








Optional Antennas

Several available. See for details



External Antenna Connector






Programmable in 20 steps




FCC Part 15, Industry Canada






** All system specifications are wireless end-to-end








System Frequency Response

72 MHz: 50 Hz - 15 kHz (±3 dB)

216 MHz: 63 Hz - 10 kHz (±3 dB)



System Signal to Noise Ratio

SQ enabled: 80 dB;

SQ enabled: 80 dB;




SQ disabled 60 dB at 72 MHz

SQ disabled 50 dB at 216 MHz



System Distortion

<2% total harmonic distortion (THD) at 80% deviation




Three band, continuously adjustable via rear panel trim pots.


Unbalanced Auxiliary Input

Two phono connectors, unbalanced, -10dBunominal input level adjustable,





+11 dBu maximum, impedance 100k Ohms






Unbalanced Output

Two phono connectors, unbalanced, 0 dBu nominal output level,



+11 dBu maximum, impedance 1k ohms










Internal/External Speaker Output

10/7 Watts (peak/RMS) continuous power with 4 ohm load



Set-upControls, Back Panel

Internal/External Antenna, Alkaline/NiMH Batteries, SQ Enabled/Disabled







User Controls, Top Panel

Volume UP/DOWN, Channel UP (lockable)







User Controls, Back Panel

Power/Charging, channel UP/DOWN, SEEK (channel, SEEK and volume are











Unit can be programmed so that only desired channels are displayed.



Squelch can be adjusted for sensitivity. Channel and volume can be locked.










LCD Display

Backlit, indicates channel, RF signal strength, lock status, programming



Power Supply Type

In-linepower supply, Listen part numberLA-201







Power Supply Input

120 VAC, 60 Hz, 19 Watts (maximum continuous)



Power Supply Output

15VAC, 1A



Power Supply Connector

.02 in OD x .01 in ID (5.0mm x 2.5 mm), barrel type





UL Listed



Optional Battery

Eight AA batteries, alkaline or NiMH.



Optional Battery Charging

Fully automatic, 14 hours



Battery Life (Listen batteries)

12+ hours alkaline (LA-361),10+ hours NiMH rechargeable(LA-362),mid



volume, music programming (volume and audio type will effect battery life)






Dimensions W x D x H

11.0 x 9.0 x 7.0 in. (27.9 x 22.9 x 17.8 cm)



(with bracket/handle in up position)

Handle stands off unit 2.0 in. (5.1 cm)







Dimensions (without bracket/handle)

9.0 x 7.0 x 7.0 in. W x D x H (22.9 x 17.8 x 17.8 cm)



Unit Weight

6.2 lbs. (2.8 kg)


Unit Weight with LA-201Power Supply

7.6 lbs. (3.5 kg)





Unit Weight with eight AA batteries

6.8 lbs. (3.1 kg)



Shipping Weight

10 lbs. (2.8 kg)



Micophone Stand Mounting Nut


16 mm



Temperature - Operation

14 to 104° F (-10to +40° C)


Temperature - Storage

-4to 122° F(-20to +50° C)




0 to 95% relative humidity, non-condensing


Photographs, CAD drawings, etc. available at

Don't miss a single sound.

Listen Technologies Corporation

Phone: 1.801.233.8992 or 1.800.330.0891

14912 Heritage Crest Way

Fax: 1.801.233.8995


Salt Lake City, UT 84065-4818U.S.A.


updated 10.21.05