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Listen LT700-150 Portable Tour Guide Transmitter

The Listen LT 700-150 is a Portable Tour Guide Transmitter designed specifically to transmit to the Listen range of portable receivers (LR400 and LR500). Perfect for walking/moving tours where you require a complete wireless system.
Product Name: Listen LT700-150 Portable Tour Guide Transmitter
Product Code: LT700-150
Brand: Listen
Listen LT700-150 Portable Tour Guide Transmitter
RRP AUD $999.00
You Save AUD $100.00
Our Price AUD $899.00

Listen LT-700-150 Portable Tour Guide Transmitter


The Listen LT-700 Portable Transmitter is used to wirelessly broadcast audio for a variety of portable applications. Whether its voice or music, the user can broadcast audio to everyone in the audience without having to carry a microphone or be plugged into a wall. The LT-700 is excellent for factory tours, outdoor events, wireless microphone applications, classrooms, training, or personal use - anywhere amplified sound is needed, with no installed system is present. With the many features of the LT-700, portable transmission has never been easier for users!

  • Portable transmission - Broadcast the interpreter or tour guide's voice to everyone in the audience without having to carry a microphone or be plugged into a wall.
  • Superior Audio Quality - 80 dB signal-to-noise ratio, setting the industry's sound quality standard.
  • With a choice between 32 channels, Listen products are ideal for a wide range of applications.
  • 100 % Digital - Listen receivers are digitally-tuned so transmission won't drift; assurance that when a channel is selected, it stays on that channel.
  • Uses standard alkaline or NiMH batteries - Built in SmartCharge" won't allow batteries to overcharge (NiMH batteries only).
  • Look and Listen" LCD shows channel, battery status, and programming information.
  • Up to six (6) simultaneous transmitted channels.
  • Transformer charging plug or drop in charging contacts.
  • Built in SmartCharge" won't allow batteries to overcharge. Charging circuitry is conveniently built into Listen's LT-700-150 Transmitter; never worry about unplugging a transformer at a certain time.
  • Mute switch.
  • Mic and/or line level inputs.
  • Many accessory options make Listen products ideal for a wide range of applications.
  • Limited Lifetime Warranty with hassle-free support.

Listen LT-700-150 Portable Tour Guide Transmitter


Architectural Specs

The portable FM transmitter shall be capable of broadcasting on 32 channels. The unit shall incorporate a microphone sensitivity switch. The device shall broadcast on both wide and narrow band channels with a SNR of 80 dB or greater. The device shall have an audio frequency response of 50 Hz to 15 KHz (±3 dB). The device will incorporate a mute switch.

The battery door shall be capable of being mechanically locked. The device shall incorporate an LCD display that indicates channel, battery level, low battery, battery charging, and RF signal strength. The device shall be able to enable companding. The unit shall operate off of two (2) AA batteries; alkaline or NiMH. The portable transmitter shall incorporate automatic battery charging circuitry for recharging of NiMH batteries, with the ability to charge via a wall transformer or drop in charging case. The Listen LT-700-150 is specified.


    RF Frequency Range 150.8000 MHz - 152.3500 MHz

    Number of Channels 6 wideband, 26 narrowband

    Number of Simultaneous Transmitters Six (6)

    Frequency Accuracy ± .005% stability 32 to 122º (0 to 50ºC)

    Transmitter Stability 50 PPM

    Transmission Range up to 45.7m (150 ft.)

    Output Power 10 mW maximum

    Antenna Uses microphone cable

    Antenna Connector 3.5 mm connector

    Compliance C-Tick

    System Frequency Response 50 Hz - 15 kHz (±3dB)

    System Signal to Noise Ratio SQ enabled 80 dB, SQ disabled 60 dB

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

    Microphone Input Unbalanced, tip of 3.5mm connector, -20 dbu nominal, -30 dbu maximum, impedance 21 ohms

    Microphone Sensitivity Three position switch: high, middle, and low; 6db increments

    Line Input Unbalanced, ring of 3.5mm connector, -10 dbu nominal input level, -3 dbu maximum, impedance 10K ohms

    Microphone Power 3VDC Bias
Controls and Indicators
    User Controls Power, mute, channel UP/DOWN

    Set-up Controls (battery compartment) Mic sensitivity, NiMH/alkaline battery, SQ enable/disable

    Programming Channel lock out, Channel lock

    LED Red, illuminated when unit is on. Flashes when batteries are low,

    or to indicate charging. Flashes when muted.

    Display Channel Designation, lock status, signal strength indication, battery life, RF
    Battery Type Two (2) AA batteries, alkaline or NiMH

    Power Battery Life (Listen batteries) 15 hours alkaline (LA-361), 8 hours NiMH rechargeable (LA-362)

    Battery Charging (NIMH only) Fully automatic, 13 hours

    Power Supply I/P 120VAC; O/P 7.5VDC 250 mA; Drop in contact points for use with charging cases. Power supply not included (LA-202)

    Power Supply Connector 2.3mm OD by 0.7mm ID, barrel type connector 7.5 VDC, center positive <250mA. Drop in contact points for use with Listen charging cases

    Power Supply Compliance RoHS, WEEE, UL, PSE, CE, CUL, TUV, CB compliant
    Dimensions (H x W x D) 3.00 x 1.00 x 5.00 in. (7.6 x 2.5 x 13.0 cm) Color Dark Grey with white silk screening

    Unit Weight 3.9 oz (111g)

    Unit Weight with batteries 5.8 oz (164g)

    Shipping Weight 1.0 lbs. (0.45kg)

    Door Manually Lockable (on sides). Up, down, and power buttons through door
    Temperature - Operation 14 to 104º F (-10 to 40º C)

    Temperature - Storage -4 to 122° F (-20 to 50° C)

    Humidity 0 to 95% relative humidity, non-condensing
Specifications are subject to change without notification