Listen LT-800 User Manual page 35

Preparing the LR-100 For Use
Speaker Connection
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The LR-100 contains a 44-watt (31 watt RMS), 4-Ohm
power amplifier.
The Speaker Selection switch determines what audio
is directed to the power amplifier. With the switch in
the OUTPUT position, the OUTPUT audio (same audio
that is on the OUTPUT audio connectors) is directed
to the power amplifier. With the switch in the AUX
position, only AUXILIARY input audio is directed to the
power amp. This allows you to use the power amp
separate of the RECEIVER audio if desired.
Note: When the speaker switch is in the OUTPUT po-
sition and the MUTE control is enabled (indicated by
the illumination of MUTE LED), the speaker output is
also muted.
Connection to the speaker is achieved through pins 1
and 2 on the detachable terminal block. Strip the
speaker wires, rotate the screws on the terminal block
counter-clockwise, insert the wires and then tighten
the screw clockwise until the wire is secure in the
connector block. You may connect any parallel, series
combination of speakers that produces an impedance
of 4-ohms or greater.
Example: If you have two 8-ohm speakers, you can
connect these in parallel to produce a 4-ohm load to
the power amp.
The SPEAKER level control on the front panel adjusts
the level of the speaker.
The front panel headphone jack is in parallel with the
speaker level. Connect any mono or stereo headphone
to this 3.5mm jack. Adjust level with the SPEAKER
volume knob.
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Internet: www.ListenTech.com
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All specifications subject to change without notice.
Installation – Antenna
A properly installed antenna is critical to the operation of
the LR-100. Without a strong and consistent RF signal
from the transmitter, the LR-100 will not meet the needs
of your installation. You can use the RF POWER indica-
tion on the LCD to provide a relative RF signal strength.
You should see four or more dots displayed on the LCD
for best results.
Using the supplied helical antenna
Connect the antenna to the rear BNC connector and ori-
ent the antenna vertically. If reception is from the trans-
mitter is not adequate, consider using a remote antenna
(see below) or place the LR-100 at an improved location
to improve the signal strength. See "Strategies for Maxi-
mizing RF Reception" on page 44 for more information.
Using a remote antenna
For better reception in longer broadcast range applica-
tions, you should use a remote antenna. A remote an-
tenna will allow you to get the antenna higher in altitude
and in a position that is clear of obstructions. Please
refer to the specific antennas instructions for installa-
tion. Also refer to "Strategies for Maximizing RF Recep-
tion" on page 44 for additional information.
CAUTION: When installing antennas, ensure the antenna
is clear of power lines.
NOTES: If the RF signal to the 216MHz model is too
high, the audio will be distorted. This may happen if the
LR-100 is within 40 feet of the LT-800-216 transmitter.
Consider reducing the output power of the transmitter or
optionally removing the antenna on the LR-100 (there is
sufficient internal antenna inside the LR-100 to receive
an adequate signal from the transmitter).
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