User Manual

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12. LINE OUT
These stereo outputs are supplied with the XLR jacks, delivering signal output from all input sources.
13.MONO OUT
This 1/4" phone jack is unbalanced TRS connector. It can be regarded as a sum output of the left and right of MAIN MIX.
14.MIC OUT
This 1/4" phone jack is unbalanced TRS connector used for microphone output.
15.REC OUT(PHONE JACK)
These unbalanced RCA jacks are to be connected to recording media such as cassette tape recorder.
16.LINE INPUTS
Double-line inputs(RCA connectors for stereo music sources). The left and right channels are combined, resulting in a single mono signal that can be directed to one or two the audio outputs.
17.LINE/MIC/PHANTOM POWER SWITCH
This switch is used for selecting the LINE, MIC or phantom power(+18~21V). Push the switch to left, the input enters into LINE mode; put the switch in the middle position, the +18V phantom power come into force; and push the switch to right, the input becomes MIC mode.
18. MIC/LINE INPUTS
These balanced/unbalanced combo connector are used for the MIC/LINE signal input.
19. MIC 1 PRIORITY POTENTIOMETER
The muting circuitry activates in the presence of signal from Mic 1.This potentiometer determines the mixing level of Mic or line input signals with signals of priority channels, adjusting it to minimum shall cut off all other inputs when signal is presence in priority channel (Mic 1). Whereas setting it to max shall allow free mix of all signals including priority input. Some application shall not require this feature, such as in the hall of prayer, thereby to bypass the circuitry, adjust the level to the maximum.
Application Example (2)......Lecture Hall/ Conference Room
Note that the priority mute is set to minimum,thus allow free mix of signal from all channels.
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The above schematic shows a simple setup for sound reinforcement in lecture theatre
or conference room or hall of prayer.
PROFESSIONAL MIXER PREAMPLIFIER
11.DC POWER SUPPLY
This pre-amplifier can also operate using 24V DC power supply. When both the AC and DC source is connected, is shall operate using AC main whereas the DC supply shall be only consumed whenever the former failed.