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6 User Guide
6.1 Interface description
Picture 1- Interface display
Table 3- Interface Description
Number
Name
Description
○
1
Line in
interface
Audio signal input, used to connect external audio input.
○
2
Speaker
interface
Output the maximum power adaptively according to the input
voltage of the equipment;
4Ω speakers, POE/10W, 12V/10W, 18V/20W, 24V/30W;
Power is related to power supply voltage. The larger the
speaker impedance, the smaller the output power. The
recommended wire diameter: 18AWG or larger.
○
3
Line out
interface
The audio signal output impedance is 600 Ω, and the
single-ended output voltage is 2.54Vpp. Used for external
headphones or powered speakers.
○
4
Microphone
interface
It is recommended to use an electret condenser microphone
with an impedance of 2.2K Ohm. Sensitivity: -38dB, bias