UPA-120 USB
© Copyright LOTRONIC 2012
Page 9
10. MASTER LEVEL CONTROL
Used to adjust the main level volume
11. VUMETER
These LED display shows the level of what ever is present on general output. If the led 2 to 10 light, the operating and level are OK. If the
led 12 lights, that means the level is too high and the output is in distortion. So you must to decrease level of all input levels.
12. PROTECTION & TEMPERATURE LEDS
The PROT led light’s on when something is wrong on the power amplifier ( inside or outside like the speakers ). If this led ligh’s on,
unplugged the speakers. If led stay on, that means your power amplifier have a electronic problem. In this case, please contact your dealer
or the BST PRO technical service
If the TEMP led light’s on, that means you power amplifier is in overheat. Stop it and check if fan is not blocked or obstructed.
13. POWER LED
This indicator lights when the power amplifier is switching on
14. MIC 2 INPUTS ( MIC LEVEL )
Connect on this input the receiver of a wireless microphone ( MIC level ). The XLR socket have fantom power suplly.
Connector : jack 6.35mm + XLR
15. MIC 3 INPUTS ( MIC LEVEL )
Connect on this input the receiver of a wireless microphone ( MIC level ). The XLR socket have fantom power suplly.
Connector : jack 6.35mm + XLR
16. MIC 2 PHANTOM POWER BUTTON
Phantom power, in the context of professional audio equipment, is a method for transmitting DC electric power through microphone cables
to operate microphones that contain active electronic circuitry.It is best known as a convenient power source for condenser microphones,
though many active direct boxes also use it. If the mic connected on the mic 2 input is a condenser microphone, please push this button to
activate phantom power
Note: If the microphone connected on the mic input is a dynamic mic, disable phantom power or you will destruct the mic
17. MIC 2 GAIN CONTROL ( XLR )
This rotary potentiometer is used to adjust the gain of mic 2 XLR input
Note : don’t adjust the gain to high or the sound must be saturated
18. MIC 3 GAIN CONTROL ( XLR )
This rotary potentiometer is used to adjust the gain of mic 3 XLR input
Note : don’t adjust the gain to high or the sound must be saturated
19. MIC 3 PHANTOM POWER BUTTON
Phantom power, in the context of professional audio equipment, is a method for transmitting DC electric power through microphone cables
to operate microphones that contain active electronic circuitry.It is best known as a convenient power source for condenser microphones,
though many active direct boxes also use it. If the mic connected on the mic 3 input is a condenser microphone, please push this button to
activate phantom power
Note: If the microphone connected on the mic input is a dynamic mic, disable phantom power or you will destruct the mic
20. LINE OUT
The signal of this output is the same of the main signal so you you can use this output to connect a secondary power amplifier.)
21. AUX 2 INPUT
The level of this inputs is line so you can connect on these inputs only items with line level ( cd player, tape player, minidisc, mixer,... ). you
cannot connect turntable ( phono level ) or microphone ( mic level )
22. AUX 1 INPUT
The level of this inputs is line so you can connect on these inputs only items with line level ( cd player, tape player, minidisc, mixer,... ). you
cannot connect turntable ( phono level ) or microphone ( mic level )
23. MIC 3 INPUT (LINE LEVEL )
Connect on this input the receiver of a wireless microphone ( line level ). As the level of this input is line, you can connect on this input only
items with line level ( cd player, tape player, minidisc, mixer,... ). You cannot connect turntable ( phono level ) or microphone ( mic level )
24. MIC 2 INPUT (LINE LEVEL )
Connect on this input the receiver of a wireless microphone ( line level ). As the level of this input is line, you can connect on this input only
items with line level ( cd player, tape player, minidisc, mixer,... ). You cannot connect turntable ( phono level ) or microphone ( mic level )
25. MUTE CONTROL
This control is used to adjust the level of decrease for priority function. This function operates on all input ( except mic 1 ).
On the min control, the function is disable.
Inputs recover their normal level if the user stops to talk on the mic 1 input more than 3s
26. EMC INPUT ( EMERGENCY )
Connect on these inputs emergency periphericals ( emergency message, emergency ringing,... ). This input have a priority function. It
decrease the volume of all inputs ( except mic 1 input )
27. SPEAKER OUTPUT
These output are used to connect low impedance speaker, 70V speaker or 100V speaker
28. POWER SUPPLY FUSE
Plug the AC power cord on this socket. Before plugging this cord in, be sure the voltage of AC outlet is correct. ( 220V )
The fuse is used to protect your power amplifier from different kinds of ac problems. If the power amplifier is “on” and nothing lights, please
verify the fuse compartment. If fuse is broken, please read it and change with a new one of same size and value.
29. USB INPUT
Connect on this socket an USB key or a USB hard drive
