GBC DCB-120BC User manual

FRONT PANEL DESCRIPTION
FEATURE
5 MIC inputs, 3 Aux and 2 Line inputs, 1 Pre-amp output, 1 group of Aux Send and Aux Return
MIC 1 priority with mute-function
Main volume control, treble and bass adjustors
With 10-segments signal level indication; with power, signal, peak and fault indication
Build in Mp3 player with LCD display and remote control
Over current, over heating and short circuit protection, with limiter
Turn on delay and DC offset protection
Use CMOS power transistor
6 zoning output with volume controllers
Output: 100V, 70V, 4~16 ohm
Power supply: AC230V, DC24V
1. MIC 1 VOL
This control determines the proportion of the MIC 1 channel signal in the mix, and provides a visual indication
of channel vol.
2. MIC 2/LINE 1 VOL
This control determines the proportion of the MIC 2/LINE 1 channel signal in the mix, and provides a visual
indication of channel vol.
3. MIC 3/LINE 2 VOL
This control determines the proportion of the MIC 2/LINE 1 channel signal in the mix, and provides a visual
indication of channel vol.
4. MIC 4/AUX 1 VOL
This control determines the proportion of the MIC 4/AUX 1 channel signal in the mix, and provides a visual
indication of channel vol.
Please use the original packaging if the device is to be transported.
Never remove the serial barcode from the device as this would make the guarantee void.
Please consider that unauthorized modifications on the speaker-system are forbidden due to safety reasons!
If this device will be operated in any way different to theone described in this manual, the product may suffer
damages and the guaranteebecomes void. Furthermore, anyother operation may leadto dangers like shortcircuit,
burns, electric shock, hearing loss etc.
61.6112.45

10. THE LED INDICATOR FOR POWER, FAULT, PEAK, SIGNAL AND LEVEL
When the power switch is turned on, the POWER LED will be illumed, so the user may be aware of it.
When the FAULT LED is illumed, means the device is damaged, so you must stop using it.
The PEAK indicator circuit monitors the output signal level. When it illuminates, means that the gain or EQ
boost should be reduced.
The signal LED lights when the output signal level reaches approximately -30dBu.
10-segment LED METER monitors output signal level.
11. POWER SWITCH
Depressing the power switch supplies power to the power amplifier.
12. ZONE CONTROL
They are 6 rotatable band switches, to adjust 6 zone volumes in 5 steps.
9. LEVEL VOL
Turn this knob to adjusts the final level of the Main output.
8. BASS CONTROL
Turn this knob clockwise to boost low frequency. The control has a shelving response giving 15dB of boost or
cut at 100Hz.
7. TREBLE CONTROL
Turn this knob clockwise to boost high frequency. The control has a shelving response giving 15dB of boost
or cut at 10kHz.
6. AUX 3/MP3 VOL
This control determines the proportion of the AUX 3/MP3 channel signal in the mix, and provides a visual
indication of channel vol.
13. MP3 PLAYER WITH BLUE TOOTH
(1) The SD card connector.
(2) Mode: Press this key and release, change the source to USB, SD or Blue tooth.
(3) Play/Pause: In playing state, press this key to pause playing, press it again to recover playing.
(4) Folder/Record: Press this key and release, enter the menu; press it and hold it, enter recording state.
(5) Cycle mode: Press this key to change cycle mode.
(6) Prev-/ : Press this key and release, jump to the previous song and play; push this button and hold it, enter
the rewind state.
(7) Next/ : Press this button and release, jump to the next song and play; push this button and hold it, enter
the fast forward state.
(8) The USB connector.
5. MIC 5/AUX 2 VOL
This control determines the proportion of the MIC 5/AUX 2 channel signal in the mix, and provides a visual
indication of channel vol.
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19. AUX 2 INPUT
The AUX 2 input (with RCA sockets) allows cassette recorder or CD player and sent to the Main output.
20. AUX 3 INPUT
The AUX 2 input (with RCA sockets) allows cassette recorder or CD player and sent to the Main output.
21. MUTE CONTROL
This control adjusts the mute-function on MIC 1 for priority.
22. MIC 2/LINE 1 BUTTON
The MIC 4 input accepts a 1/4¡±type TRS phone jack. Please use a low impedance microphone and a
properly wired cable for best results.
27. MIC 4
REAR PANEL DESCRIPTION
15. MIC 1 INPUT
The MIC 1 input accepts XLR/TRS phone jack. Please use a low impedance microphone and a properly
wired cable for best results.
16. MIC 2/LINE 1 INPUT
The MIC 2 input accepts XLR phone jack while the LINE 1 input accepts a 1/4¡±type TRS jack. Please use
a low impedance microphone and a properly wired cable for best results.
18. AUX 1 INPUT
The AUX 1 input (with RCA sockets) allows cassette recorder or CD player and sent to the Main output.
17. MIC 3/LINE 2 INPUT
The MIC 3 input accepts XLR phone jack while the LINE 2 input accepts a 1/4¡±type TRS jack. Please use
a low impedance microphone and a properly wired cable for best results.
A button for changing input source between Mic 2 and Line 1.
23. MIC 3/LINE 2 BUTTON
A button for changing input source between Mic 3 and Line 2.
24. MIC 4/AUX 1 BUTTON
A button for changing input source between Mic 4 and Aux 1.
25. MIC 4/AUX 1 BUTTON
A button for changing input source between Mic 5 and Aux 2.
26. MIC 4/AUX 1 BUTTON
A button for changing input source between Mp3 and Aux 3.

30. PREAMP OUT
The PREAMP(previous amplifier) OUTPUT with XLR-M socket provides signal to a cassette deck or home
audio equipment.
32. ZONE 1~6 OUTPUT CONNECTOR
6 zone outputs with terminal connectors. The voltage of these outputs is 100V.
31. SPEAKER OUTPUT CONNECTOR WITH POLE
3 direct speaker outputs with pole connectors. These poles contain: COM, 4~16¦¸, 70Vand 100V.
33. DC 24V IN
Outside DC 24V input connector with 2 terminals.
34. POWER INPUT CONNECTOR WITH FUSE
The POWER INPUT CONNECTOR is connected to a electrical outlet by power cord. The powered mixer can
be supplied with the voltage AC115V/60Hz or AC230V/50Hz(push the power selector on the flank).
35. DC FUSE FOR THE POWER OF CMOS TRANSISTOR
TECHNICAL SPECIFICATIONS
Rating power
Mic input
Line input
Model
AC FUSE
300 mV, 10k Ohms
5 mV, 600 Ohms
180W RMS
5A/250V
250W RMS
DCB-120BC
120W RMS
7A/250V 10A/250V
DC FUSE 20A/250V 20A/250V 25A/250V
350W RMS
10A/250V
25A/250V
a. Please read the entire attached documents carefully before using the device, and keep them for your
reference.
b. The power supply must match the demand of the device with reliable ground wire.
c. All covering signal should be complied with the demand of the device.
d. Make sure to shut off before connecting
e. The device should be equipped far away high temperature, moisture and powerful electromagnetic field.
f. Please don't use organic cleaner but dry soft cloth to clear the device.
NOTES
DCB-180BC DCB-250BC DCB-350BC
29. A GROUP OF SEND AND RETURN
Connect SEND(with RCA jack) to another device for sending output signal to that device.
Connect RETURN(with RCA jack) to another device for accepting signal from that device.
If you don not use these, please connect SEND and RETURN for short circuit.
The MIC 5 input accepts a 1/4¡±type TRS phone jack. Please use a low impedance microphone and a
properly wired cable for best results.
28. MIC 5