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Dear Valued Customer,
Thank you for choosing Listen! All of us at Listen are dedicated to providing
you with the highest quality products available. We take great pride in their
outstanding performance because we care that you are completely
satised. That’s why we independently certify them to the highest quality
standards and back them with a limited lifetime guarantee. We stand ready
to answer any questions you might have during installation or in the operation
of our products. Should you experience any problems whatsoever with your
Listen products, we are ready to help you in any way we can with prompt,
efcient customer care. Because at Listen, it’s all about you! And should you
have any comments on how we might improve our products or our
service, we’re here to listen.
Here’s how to reach us:
+1.801.233.8992
+1.800.330.0891
+1.801.233.8995
North America
fax
support@listentech.com
www.listentech.com
Thank you and enjoy your listening experience!
Best regards,
Russell Gentner and the Listen Team
• In the few instances where repairs were needed, 99% of all clients indicated that they were happy with
repair turn-around-times and 85% of the time, clients were without their product for less than 10 days!
• Overall client satisfaction of working with Listen was rated 4.8 out of 5.
• “ Please continue with your excellent attitude toward customer satisfaction. You guys are great!”
• “I’ve never had such good service from any company. Keep up the good work!”
• “You stand behind your product wonderfully.”
Assistive Listening • Language Interpretation • Soundeld • Tour Group • Conferencing
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Microphones Table of Contents
Specications 3
Microphones 5
Sensitivity Settings 5
LA-261 Lavalier Microphone 6
LA-262 Over-the-Head Microphone 7
LA-270 Noise Canceling Microphone 8
LA-272 Over-the-Head Microphone with Earphone 9
LA-274 Hand Held Microphone 10
LA-276 Collar Microphone 11
LA-277 Conference Microphone 12
LA-278 Behind-the-Head Microphone 13
LA-279 Over-the-Ear Microphone - Presentation Style 14
Table of Contents
Specications
Supplementary Information 15
Troubleshooting 15
Warranty 16
Contacting Listen 16
Optional Accessories 17
Sensitivity Settings
Microphones
Information
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Microphone Specications
Specication LA-261
Description
Frequency Rsponse 20 Hz - 15 KHz
Impedance less than 2.2K Ohms
DL Bias 3 VDC required
Connector 3.5 mm mono
Cable Length 36.00 in. (92.0 cm)
Weight 4 oz. (113 g)
Accessories None
High performance lavalier microphone, omni-directional, electronic condenser. Black. Clip included.
Specication LA-262
Description
Frequency Response 30 Hz - 5 KHz
Impedance 680 Ohms
DL Bias 3 VDC required
Connector 3.5 mm mono
Cable Length 36.00 in. (92.0 cm)
Weight 8 oz. (227 g)
Accessories
Head-worn, uni-directional, electronic condenser
microphone. Black. Clip and wind screen included.
LA-264 Replacement Cushions for Over-the-Head
Microphone (1 set)
Specication LA-274
Description
Frequency Response 20 Hz - 15 KHz
Impedance less than 2.2K Ohms
DL Bias 3 VDC required
Connector 3.5 mm mono
Cable Length 36.00 in. (92.0 cm)
Weight 4 oz. (113 g)
Accessories None
High performance hand held, omni-directinal, electronic condenser microphone. Black. Wind screen and
wire stand included
Specication LA-277
Description
Frequency Response 20 Hz - 12 KHz
Impedance 1K Ohms
DL Bias 1.5 VDC required
Mic Height 2.30 in. (58 mm)
Mic Diameter 1.4 in. (35 mm)
Connector 3.5 mm mono
Cable Length 48.00 in. (1.2 m)
Weight 4 oz. (113 g)
Accessories None
High performance omni-directional microphone,
electronic condenser. Black
Specication LA-270
Description
Frequency Response 300 Hz - 10 KHz
Impedance 1K Ohms
DL Bias 3 VDC required
Connector 3.5 mm mono
Cable Length 55.00 in. (1.4 m)
Weight 2 oz. (59 g)
Accessories None
Head-worn, noise-canceling condenser microphone,
uni-directional. Black. Wind screen included.
Specication LA-272
Description
Frequency Response 30 Hz - 5 KHz
Impedance 680 Ohms
DL Bias 3 VDC required
Connector 3.5 mm mono
Cable Length 36.00 in. (92.0 m)
Weight 8 oz. (227 g)
Accessories
Specication Earphone
Description Single ear receiver. Black
Frequency Response 20 KHz - 15 KHz
Impedance 32 Ohms
Max Input 130 mW maximum
Connector 3.5 mm mono
Accessories Ear Cushions
Head-worn, uni-directional, electronic condenser
microphone. Black. Clip and wind screen included.
LA-264 Replacement Cushions for Over-the-Head
Microphone
Specication LA-276
Description
Frequency Response 300 Hz - 18 KHz
Impedance 1K Ohms
DL Bias 1.5 VDC required
Mic Length 22.00 in. (55.9 cm)
Connector 3.5 mm mono
Cable Length 48.00 in. (1.2 m)
Weight 4 oz. (113 g)
Accessories None
Shoulder/neck-worn, uni-directional microphone.
Black. Flexible body. Wind screen included.
Specications
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Microphone Specications (cont.)
Specications
Specication LA-278
Description
Frequency Response 150 Hz - 10 KHz
Impedance 2K Ohms
DL Bias 3 VDC required
Mic Length 4.50 in. (11.5 cm)
Connector 3.5 mm mono
Cable Length 52.00 in. (1.3 m)
Weight 1.5 oz. (42.5 g)
Accessories None
High performance omni-directional microphone,
electronic condenser. Black
Specication LA-279
Description
Frequency Response 50 Hz - 18 KHz
Impedance 1,500 Ohms ± 30% (at 1 KHz)
DL Bias 3 VDC required
Connector 3.5 mm mono
Cable Length 36.00 in. (92 cm)
Weight 4.8 oz. (136 g)
Accessories None
Head-worn microphone, omni-directional, electronic
condenser microphone, tan colored.
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Microphones
Introduction
Your Listen microphone is designed to provide high quality audio when used with a Listen LT-700
Portable FM Display Transmitter. Listen microphones will work with LT-700 units on either 72 MHz or
216 MHz. Your Listen microphone will also work with any product that supplies 3 VDC phantom
power and conforms to the diagram below.
3.5 mm jack
To achieve the desired audio quality from your Listen microphone, it is important to use it as
instructed. The instructions for your microphone provide guidelines on placement and use.
If you experience trouble with your microphone, check the troubleshooting section of this manual
first to try to resolve the problem. If you are still having difficulties, contact Listen support (support
information available in the back of this manual).
Sensitivity Settings
Important Information About Microphone Sensitivity Settings
When you connect your Listen Microphone to your LT-700 Portable FM Display Transmitter, you
must make sure that the microphone sensitivity switch (located inside the front cover of the
LT-700) is set to the sensitivity specified for your microphone. If this switch is not in the correct
position, your audio may sound low or distorted. Please note the sensitivity setting for your
microphone and check the switch setting in the LT-700 prior to using your Listen
equipment.
The microphone sensitivity switch is located
inside the front cover of the LT-700.
Part # Microphone Type
LA-261 Lavalier Microphone omni-directional MED
LA-262 Over-the-Head Microphone uni-directional MED
LA-270 Noise Canceling Microphone uni-directional MED
LA-272 Over-the-Head Mic with Earphone uni-directional MED
LA-274 Hand Held Microphone omni-directinal HI
LA-276 Collar Microphone uni-directional HI
LA-277 Conference Microphone omni-directional HI
LA-278 Behind-the-Head Microphone uni-directional MED
LA-279 Over-the-Ear Microphone-Presentation Style omni-directional MED
Mic sensitivity
Switch Position
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element
element
LA-277
LA-261 Lavalier Microphone
The LA-261 Lavalier Microphone is a high performance, non-directional microphone that clips on
your collar or lapel.
element
Using the LA-261 Lavalier Microphone
Microphones
The LA-261 has an omni-directional pickup pattern. This means that audio from a broader area
can be picked up by the microphone element. The main advantage of this type of microphone
is that it does not have to be oriented directly towards your mouth for good audio pickup.
•Set the microphone sensitivity switch (located inside front cover of the LT-700 Portable FM
Display Transmitter) to the MED position.
•Clip the microphone as close as possible to your mouth. For best results the mic element should
be no more than 6 inches from your mouth. This will help to ensure that the microphone picks
up your voice rather than room noise.
•Make sure the microphone is not rubbing on your face or clothing.
•Connect the plug firmly to the microphone connector on the LT-700.
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LA-262 Over-the-Head Microphone
The LA-262 Over-the-Head Microphone provides high quality audio pickup with its directional boom
microphone.
element
The LA-262 has a uni-directional pickup pattern. This means that the microphone’s element
must be oriented towards your mouth. It will not pick up audio very well from the side of the
microphone. The main advantage of this type of microphone is that it helps minimize feedback
and picks up less environmental noise.
Using the LA-262 Over-the-Head Microphone
•Set the microphone sensitivity switch (located inside front cover of the LT-700 Portable FM
Display Transmitter) to the MED position.
•Place the unit over your head and position the microphone as close as possible to your
mouth. For best results the mic element should be 1 to 2 inches from your mouth. This will help
to ensure that the microphone picks up your voice rather than room noise.
•Make sure the microphone is not rubbing on your face or clothing.
•Connect the plug firmly to the microphone jack on the LT-700.
Microphones
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LA-270 Noise Canceling Microphone
LA-268
element
element
The LA-270 Noise Canceling Microphone provides high quality audio pickup with its directional
boom microphone. Its noise canceling technology makes it ideal for noisy environments such
as factory tours.
element
Using the LA-270 Noise Canceling Microphone
Microphones
The LA-270 has a uni-directional pickup pattern. This means that the microphone’s element
must be oriented towards your mouth. It will not pick up audio very well from the side of the
micrphone. The main advantage of this type of microphone is that it helps minimize feedback
and picks up less environmental noise.
•Set the microphone sensitivity switch (located inside front cover of the LT-700 Portable FM
Display Transmitter) to the MED position.
•Place the unit over your ears, wrapping it behind your head. Position the microphone as close
as possible to your mouth. For best results the mic element should be 1 to 2 inches from your
mouth. This will help to ensure that the microphone picks up your voice rather than room noise.
•Connect the plug firmly to the microphone jack on the LT-700.
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LA-272 Over-the-Head Microphone with Earphone
The LA-272 Over-the-Head Microphone provides high quality audio pickup with its directional boom
microphone. It allows you to simultaneously transmit on a LT-700 and receive audio on a Listen
portable receiver.
element
The LA-272 has a uni-directional pickup pattern. This means that the microphone’s element must be
oriented towards your mouth. It will not pick up audio very well from the side of the microphone.
The main advantage of this type of microphone is that it helps minimize feedback and picks up less
environmental noise.
Using the LA-270 Over-the-Head Microphone with Earphone
•Set the microphone sensitivity switch (located inside front cover of the LT-700 Portable FM Display
Transmitter) to the MED position.
•Place the unit over your head and position the microphone as close as possible to your mouth.
For best results the mic element should be 1 to 2 inches from your mouth. This will help to ensure
that the microphone picks up your voice rather than room noise.
•Connect the earphone plug firmly to the earphone jack on the Listen receiver.
•Connect the microphone plug firmly to the microphone jack on the LT-700.
Microphones
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LA-274 Hand Held Microphone
element
LA-276
element
LA-268
element
element
The LA-274 Hand Held Microphone provides high quality audio pickup with its non-directional
pickup pattern. Its small size makes it easy to use. The unit can be held in the hand, or placed in
a stand on a table, as shown below.
element
Using the LA-274 Hand Held Microphone
Microphones
The LA-274 has an omni-directional pickup pattern. This means that audio from a broader area
can be picked up by the microphone element. The main advantage of this type of microphone
is that it does not have to be oriented directly towards your mouth for good audio pickup.
•Set the microphone sensitivity switch (located inside front cover of the LT-700 Portable FM
Display Transmitter) to the HI position.
•Connect the microphone plug firmly to the microphone jack on the LT-700.
•To use, slide the switch on the side of the microphone to the ON position (toward the mic
element). For best results the mic element should be no more than 6 inches from your mouth.
To mute your audio, slide the switch to the OFF position (toward the cord).
•A stand is provided (see illustration on page 13) for optional hands-free use. When using the
stand, try to place the mic as close to your mouth as possible.
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LA-276 Collar Microphone
The LA-276 Collar Microphone provides high quality audio pickup with its directional boom
microphone. It is ideal for users who don’t want to wear something on their heads or ears.
element
The LA-276 has a uni-directional pickup pattern. This means that the microphone’s element must be
oriented towards your mouth. It will not pick up audio very well from the side of the microphone.
The main advantage of this type of microphone is that it helps minimize feedback and picks up less
environmental noise.
Using the LA-276 Collar Microphone
•Set the microphone sensitivity switch (located inside front cover of the LT-700 Portable FM Display
Transmitter) to the HI position.
•Connect the microphone plug firmly to the microphone jack on the LT-700.
•Place the collar ring around your neck and position the microphone so that it is in front of your
mouth and as close to your mouth as possible without rubbing on your face or clothing. For best
results the mic element should be 1 to 2 inches from your mouth.
•For best results bend the microphone wire to fit snuggly around the
speakers neck.
Microphones
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LA-277 Conference Microphone
LA-277
The LA-277 Conference Microphone provides high quality audio pickup in all directions. It is
designed to be used on a table or other flat surfaces. This is an ideal microphone for multiple
users of one transmitter.
element
Using the LA-277 Conference Microphone
Microphones
The LA-277 has an omni-directional pickup pattern. This means that audio from a broader
area can be picked up by the microphone element. The main advantage of this type of
microphone is that it does not have to be oriented directly towards your mouth for good
audio pickup.
•Set the microphone sensitivity switch (located inside front cover of the LT-700 Portable FM
Display Transmitter) to the HI position.
•Connect the microphone plug firmly to the microphone jack on the LT-700.
•Place the unit on the table, clear of any obstructions that might interfere with its pick up
of voices. For best quality, users should be as close to the microphone as possible (the
ideal range is 2 to 3 feet). The closer you are to the microphone, the better it will sound.
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LA-278 Behind-the-Head Microphone
LA-268
element
element
The LA-278 Behind-the-Head Microphone provides excellent audio quality with its directional
capabilities. This microphone fits securely behind the head (below the hairline) and over the ears.
This design allows the user to adjust the size to fit on the speakers head comfortably for extended
periods of time.
element
The LA-278 has a uni-directional pickup pattern. This means that the microphone’s element must be
oriented towards your mouth. It will not pick up audio very well from the side of the microphone.
The main advantage of this type of microphone is that it helps minimize feedback and picks up less
environmental noise.
Using the LA-278 Behind-the-Head Microphone
•Set the microphone sensitivity switch (located inside front cover of the LT-700 Portable FM
Display Transmitter) to the MED position.
•Place the unit behind your head, below the hairline stretching the wire to fit comfortable over
your ears. Position the microphone as close as possible to your mouth. For best results the mic
element should be 1 to 2 inches from your mouth. This will help to ensure that the microphone
picks up your voice rather than room noise.
•Connect the microphone plug firmly to the microphone jack on the LT-700.
Microphones
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LA-279 Over-the-Ear Microphone- Presentation Style
LA-276
element
The LA-279 Over-the-Ear Microphone-Presentation Style provides high quality audio pickup with
its omni-directional microphone.
element
Using the LA-279 Over-the-Ear Microphone- Presentation Style
Microphones
The LA-279 has an omni-directional pickup pattern. This means that audio from a broader
area can be picked up by the microphone element. The main advantage of this type of
microphone is that it does not have to be oriented directly towards your mouth for good
audio pickup.
•Set the microphone sensitivity switch (located inside front cover of the LT-700 Portable FM
Display Transmitter) to the MED position.
•Place the unit over your ear and position the microphone as close as possible to your mouth.
For best results the mic element should be 1 to 2 inches from your mouth. This will help to
ensure that the microphone picks up your voice rather than room noise.
•Connect the microphone plug firmly to the microphone jack on the LT-700.
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Troubleshooting
Troubleshooting
My microphone doesn’t work.
Check to make sure your LT-700 transmitter is turned on and that the batteries are charged.
Make sure your microphone cable is plugged firmly into the microphone jack on the LT-700.
Make sure the LT-700’s MUTE switch is in the correct position. LA-274: make sure the
microphone’s ON/OFF switch is in the correct position.
My microphone audio sounds distorted or “fuzzy”.
Make sure the Mic Sensitivity Switch (inside cover of LT-700) is set to the correct position for your
microphone. Make sure you are speaking in a normal voice. If you speak too loudly, your audio
will be distorted.
My microphone works, but the audio is very low.
Make sure the microphone is connected firmly in the LT-700 Transmitter.
Make sure the microphone is positioned so the mic element points directly at your mouth. Refer
to individual microphone page to confirm correct orientation.Make sure the Mic Sensitivity
Switch (inside front cover of the LT-700) is in the correct position for your microphone. See page
5 to verify correct setting for your microphone.
Transmission seems to stop or audio cuts out.
Make sure the microphone is firmly plugged into to the LT-700.
Make sure the batteries in the LT-700 are fully charged.
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Information
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Warranty & Contacting Listen
Warranty
Listen Technologies Corporation (Listen) warrants its transmitters and receivers (LT-82, LT-700, LT-800, LR-100, LR-42,
LR-44, LR-300, LR-400, LR-500, 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.
Listen warrants its Stationary IR Radiators (LA-140) to be free from defects in workmanship and material under normal
use and conditions for three years from the date of purchase.
Listen warrants its Noise Canceling Microphone (LA-270) to be free from defects in workmanship and material under
normal use and conditions for one year from date of purchase.
Listen warrants its Charging/Carrying Cases (LA-306, LA-311, LA-313, LA-317, LA-318, LA-319, LA-320, LA-321, LA-322,
LA-323, LA-324, LA-325) to be free from defects in workmanship and material under normal use and conditions for
one year from date of purchase.
All other products and accessories are warranted for 90 days 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 modied 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 specically disclaims and negates any warranty of merchantability
or tness 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.
In the rst ninety days after purchase, any defective product will be replaced with a new unit. After 90 days, Listen
will, at its own discretion either repair or replace transmitters and receivers with a new unit or a unit of similar type
and condition. Product that is not covered under warranty shall be repaired or replaced with a unit of similar type
and condition based on a at fee. Contact Listen for details.
This limited warranty, prices and the specications of products are subject to change without notice.
Contacting Listen
If technical service is needed, please contact Listen. Pre-authorization is required before returning Listen products.
If products were damaged in shipment, please contact the carrier, then contact Listen for replacement or repair
requirements payable by the carrier.
Listen’s corporate headquarters are located in Bluffdale, Utah U.S.A. and are open Monday through Friday, 8am to
5pm Mountain Time.
14912 Heritagecrest Way
Bluffdale, Utah 84065-4818
+1.801.233.8992
+1.800.330.0891
+1.801.233.8995
support@listentech.com
www.listentech.com
North America
fax
Listen Technologies GmbH
Jasminstr.16, 90522 Oberasbach, Germany
+49 911 955 159 0
+49 911 955 159 40
support@listentech.de
www.listentech.de
Europe
Fax
Information
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Optional Accessories
v
LA-263
Line/Mic Y Input Cable for LT-700
LA-275
Portable Unit Sacrificial Cable
Cable Accessories
This cable makes it easy to use a line level source (such as a CD
player) along with your microphone. It provides one 3.5 mm male jack,
and splits to one RCA phono connector (line input to LT-700) and one
3.5mm female connector (Mic input to LT-700). The cable length of 48
in. (122 cm) serves as an antenna for the LT-700 as well.
This earphone/microphone connection cable relieves strain on your
other cables, increasing the life of your microphone or earphone. It
provides 3.5 mm mono male and female connectors with a
6 in. (15.2 cm) cable.
LT-800 Microphone ¼ in. to
LA-280
3.5 mm Adapter
This adapter enables a user to plug a mic with a
the 1/4 connector of the LT-800.
1
/8 in. (3.5 mm) tip into
Information
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Notes
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Notes
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Listen Technologies Corporation
14912 Heritagecrest Way
Bluffdale, Utah 84065-4818, U.S.A.
+1.801.233.8992
+1.800.330.0891
+1.801.233.8995
North America
fax
www.listentech.com
© 2008 Listen Technologies Corporation
®
All Rights Reserved 081308
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