Operating instructions
Example 5: NON-LECTROSONICS MIXER 
In this example, the TH3 is connected to a third-party 
mixer, and both local and remote signals are amplified. 
Note that the combined local and remote signal is 
derived from the record out jack on the TH3.  This is 
valid and completely functional, but with this configura-
tion the TH3 must be powered on in order for the local 
microphones to be audible through the sound reinforce-
ment system. 
The LecNet anti-echo feature of the TH3 will not work 
without a Lectrosonics mixer. 
Example 6: NON-LECTROSONICS MIXER, 
NO LOCAL SOUND REINFORCEMENT 
In this example, the TH3 is connected to a third party 
mixer, and only remote signals are amplified. 
The LecNet anti-echo feature of the TH3 will not work 
without a Lectrosonics mixer. 
TELEPHONE 
CODEC 
–
+ 
OUTPUT 
LEVEL 
–
+ 
IN  OUT
 AUX 
COARSE 
LEVEL
+ 
FINE 
LEVEL
 RECORD OUT 
– 
MIC 
LINE
 REMOTE CONTROLS 
OUTPUT 
Microphone Mixer 
TH3 
INPUT 
Sound Reinforcement Amplifier 
RELAY 
–
+ 
–
+ 
TELEPHONE  CODEC 
OUTPUT 
LEVEL
IN  OUT
 AUX 
COARSE 
LEVEL
+ 
FINE 
LEVEL
 RECORD OUT 
– 
MIC 
LINE
 REMOTE CONTROLS 
OUTPUT 
Microphone Mixer 
TH3 
INPUT 
Sound Reinforcement Amplifier 
RELAY 
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