User Manual
PT-AA140
8
3.3.2
Audio Input
The PT-AA140 provides with 2 stereo audio inputs, one microphone input and one
digital fiber audio input. The following figure shows the audio input ports.
48V phantom power input
When the switch turns to “48V” (It has a good frequency characteristic, high input
impedance and high sensitivity in this mode), the MIC input will provide a 48V
phantom power. This is usually used for power supply for condenser microphone,
Connection is: “+” connects to positive, “-” connects to negative and “
” to ground.
Note
: In this mode, only condenser microphone can be connected with.
MIC input
When the switch turns to “MIC” (It has a low frequency characteristics, and wide
frequency response in this mode), the microphone input is used for connecting with
dynamic microphone. There are two different connections:
a)
Unbalanced connection:
“+” and “
” connect to ground, and “-” connects to signal.
“-” and “
” connect to ground, and “+” connects to signal.
b)
Balanced connection: “+” connects to positive, “-” connects to negative and “
”
connects to ground.
Dial Switch, to select the MIC input mode,
includes MIC (dynamic microphone), 48V
(condenser microphone) and LINE
(normal audio or wireless microphone).
