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S TEREO A MPLIFIER/ AUTOMATED S WITCHER
Example 2: In-Wall Volume Control With a Fixed
Output Device
In some applications, it may be desirable to control speaker
level of both the whole-house sources and the TV, or perhaps a
local CD or DVD player that might not have a variable output,
with the in-wall volume control. In this application, the vol-
ume control would be connected to the output (SPEAKER
OUT) of the TVA50 and the fixed line level output of the TV or
local device would be used.
NOTE: If driving speakers and using volume controls on both
SPEAKER OUT A and B, minimum acceptable impedance is 4
ohms. Be sure to check speaker specifications and impedance
magnifying settings on the volume controls to assure proper per-
formance. Exceeding this load will cause the TVA50 to go into pro-
tection and shut down.
12V Trigger Out
The TVA50 has a 12VDC 200mA Trigger OUT that will be acti-
vated in the current sense mode or when 3-30V AC/DC is
detected on the Trigger IN terminal. This Trigger OUT voltage
can be used to control 12VDC controlled devices such as
drapes, screens and TV lifts.
12V Trigger Out and a TV lift
In certain exotic applications, it is desirable to keep all compo-
nents hidden from sight when not in use. A TV mounted in a
lift cabinet is a perfect example. When not in use, the TV is
hidden away in an attractive furniture quality cabinet. A
motorized lift mechanism will raise the TV up out of the cabi-
net for use when activated by voltage, IR or RF commands.
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