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Designing a System
1
Determine the number of audio channels
You will need to order one LT-82 transmitter for each audio channel. The Listen system can deliver up to four
audio channels simultaneously.
2
Determine the room size and shape
3
Complete the room layout worksheet
transmitters, power supplies and radiators using the worksheet key. The following factors will determine the
coverage of the room.
3A
Number of radiators and location
Horizontal Plane Footprint Pattern (feet)
Coverage pattern
shown in feet
Except in small rooms it is recommended that at least two radiators be used to ensure good coverage and
minimal shading. Listen radiators (when used with Listen receivers) will cover approximately 10,000
m
2
(929
) for one channel as indicated in the diagram below (note the coverage decreases as the number
of channels goes up). For two channels, one radiator will cover 5,000
ft
2
radiator will cover 2,500
(232
You should use the above coverage pattern to determine coverage of each radiator in your system, not
by trial and error. The radiator will be stronger when new and therefore is under-rated by 40 percent and
the coverage pattern above accounts for this. 40 percent degradation will occur after approximately 8,000
operating hours.
m
2
).
4 TX
ft
ft
2
m
2
(465
) and for four channels, one
2 TX
2
1 TX
9
- Quick Links:
- Lr-42 Quick Reference
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