LT-700 Troubleshooting

Troubleshooting

The LT-700 has no power

Make sure the unit has fully charged batteries, or has a Listen LA-208 wall transformer connected to it. Press the ON button. If this does not work, try a different set of batteries. Make sure the batteries are installed correctly.

There is no audio

Make sure the MUTE/TALK switch is in the TALK position. Make sure you have the microphone plugged all the way in to the input jack. Make sure you are using a Listen approved microphone (see list on page 7). If you are using the line input, make sure you have connected a line level, unbalanced input at the ring of the connector.

The audio is distorted

Make sure you are using an approved Listen microphone. Try using a different mic sensitivity switch setting (the switch is located inside the battery compartment of the unit). If you are using a line level input, try turning down the level of the input. If you are using any equipment that does not have SQ capability, turn off SQ in the LT-700.

There is hum in the audio

The microphone may be too close to a transformer. Try moving around and see if the hum goes away.

The microphone level is low

The microphone must be in close proximity to the person who is speaking. If this does not work, try using a head-worn microphone. The mic sensitivity switch may be on the wrong setting, see page 7. Try a different setting (the switch is located inside the battery compartment). Some microphones have directional pickups, ensure that the microphone in use is oriented and positioned properly (pointing at the speakers mouth).

The audio doesn’t have much fidelity

If your receivers all have SQ capability, activate SQ in all units by moving their switches to the ON position. In the LT-700 and all SQ-equipped receivers, the SQ switch is located inside the battery compartment. See page 14 for more information.

There is too much noise

This is most likely because the microphone is not close enough to the speakers mouth, and it is picking up background noise. Try positioning the microphone closer or try using a microphone that is direc- tional (such as a head-worn mic). If you are using a narrow band channel, try switching to a wide band channel. Try another setting on the mic sensitivity switch (located inside the battery compartment). Ensure the microphone is not brushing up against anything. See page 7 for more information.

There is interference

Try different frequencies until you find a clear channel.

I cannot pick up the signal on the receiver

Make sure the transmitter and the receiver are on the same frequency band and channel.

I can pick up the signal on the receiver, but it sounds like it’s not tuned in

Check to make sure the transmitter and receiver are on exactly the same channel number / letter. If using another brand of receiver refer to Listen’s Frequency Chart on page 16).

LT-700-150 specifications

Listen Technologies LT-700-150 is a state-of-the-art assistive listening transmitter designed to enhance the listening experience in various settings, such as theaters, conference rooms, and classrooms. This device stands out for its robust features and advanced technologies, making it an ideal choice for venues that prioritize accessibility and high-quality audio transmission.

One of the primary features of the LT-700-150 is its exceptional audio clarity. The transmitter operates on a broad frequency range, ensuring that it delivers crisp and clear sound quality to listeners. With a frequency response of 20Hz to 20kHz, this device captures the full spectrum of audio, which is particularly beneficial in environments with diverse sound requirements.

The LT-700-150 incorporates advanced digital processing technology, which minimizes distortion and enhances audio fidelity. This is crucial in settings where clear communication is imperative, especially for individuals with hearing impairments. The unit is designed to transmit audio over a range of up to 500 feet, making it suitable for large venues without compromising on sound quality.

Another notable characteristic of the LT-700-150 is its versatility. The device allows for easy integration into existing audio systems, thanks to its multiple input options, including microphone and line-level inputs. This flexibility makes it an excellent choice for various applications, from live performances to guided tours.

The transmitter is also equipped with a built-in limiter to prevent sudden audio spikes, which can be jarring for listeners. This feature ensures a consistent listening experience, further enhancing user comfort. Additionally, the LT-700-150 includes an automatic frequency selection feature, which scans available channels to find the clearest transmission path, helping to avoid interference from other electronic devices.

User-friendly design is another aspect of the LT-700-150, featuring a straightforward interface with clearly labeled controls. This allows operators to adjust settings quickly and efficiently, optimizing the listening experience for all users.

In summary, the Listen Technologies LT-700-150 is a sophisticated transmission device that excels in delivering high-quality audio in a variety of settings. Its advanced features, excellent sound quality, and ease of use make it an indispensable tool for ensuring accessibility and enhancing communication. Whether in a theatrical performance or an educational environment, the LT-700-150 addresses the needs of listeners, providing clarity and convenience like no other.