Listen LT-800 User Manual page 9

LT-800 Preparation; Audio Control
Connect Audio Inputs:
8
Connect audio source(s) to one or both audio input
connections. Input 1 offers a choice of balanced XLR
or 1/4" phone connection. Input 2 is an unbalanced
phono connector. (See LT-800 Rear Panel Connections
and Settings on page 6 for specific connection
instructions.)
Connect balanced and unbalanced audio sources as
9
shown in diagram. Make sure that if you are
connecting an unbalanced audio source, pin 3 of the
XLR and the ring of the 1/4" phone plug are connected
to ground as shown.
XLR Wiring
Balanced Unbalanced
1 1
2 2
3 3
- +
Input from
Balanced Unbalanced
Audio Audio
Source Source
Adjust audio input switches: For Input 1 Switch,
10
select MIC or LINE input level; for Input 2 Switch,
select LINE (-10dBu) or speaker (+10dBu) level. (See
illustration on page 6.)
Use the headset jack to listen to audio source: With
the audio source or sources active and the unit
powered ON, plug a headset into the jack located on
the LT-800's front panel to listen to the audio source.
Adjust headset volume to a comfortable level.
LISTEN TECHNOLOGIES CORPORATION +1.801.233.8992 1.800.330.0891 Fax: +1.801.233.8995
Internet: www.ListenTech.com
1/4" Phone Wiring
Balanced
Unbalanced
Tip
Ring
Sleeve
Sleeve
Audio from
Ring/Sleeve
Tip
Tip Ring
+ -
Balanced Unbalanced
Audio Audio
Source Source
All specifications subject to change without notice.
LT-800 Audio Control
Input levels can be viewed on the two VU meters on the
front panel.
1
Adjust input: Adjust the INPUT knob counterclock-
1
wise to add gain to INPUT 1. Adjust INPUT knob
clockwise to add gain to INPUT 2. If you have two
audio sources connected to both INPUT 1 and 2,
adjust the level of one input using the VU meter, then
adjust the output level of the other audio source.
Adjust the audio level so that the first VU meter does
NOT peak in the red.
Adjust Contour: Adjust the CONTOUR knob
2
counterclockwise if your audio source is mostly voice.
Adjust the knob clockwise if most of your audio
source is music. The CONTOUR knob adjusts the
relative equalization of the unit. This equalization
boosts or cuts frequencies above 5kHz.
Adjust Mix Level: Adjust the mix level knob so that
3
the audio level on the right VU meter occasionally
peaks red.
3 2
R
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