Nexus ST2120BC User manual

FRONT PANEL DESCRIPTION
FEATURES
> 3 MIC inputs, 3 AUX inputs and 1 AUX output
> 1 MIC-connection and Chime button on the front panel with priority-function
> Treble and bass controller, Main volume controller
> 7 segments level indicator and fault indicator
> Protection-circuits: over current, short circuit, turn on delay
> 6 Zone outputs with independent volume controllers
> 4-16 Ohm output for connecting a passive speaker
> 70V, 100V PA-outputs for connecting PA-speakers
> Built-in Mp3 player with Bluetooth and FM radio
1. Power Switch
Pushing the power switch to 1position to turn on the power amplifier and 0position to turn off the
power amplifier.
(2A) The SD card connector.
(2B) Mode: Push this key and release, change the play mode to
USB, SD card, Bluetooth or FM radio. Push this key with 1
second, turn off or turn on the player.
(2C) Play/Pause: In playing state, push this key and release to
pause playing, push it again to recover playing. In FM radio
mode, press it and release, automatic searching FM station.
(2D) Folder: Push this key and release, enter the folder menu.
Then push the PREV or NEXT key to select a song,
and push the PLAY/PAUSE key to play.
(2E) Repeat: Push this key to change cycle mode.
(2F) Prev/ : Push this key and release, play the previous song. In USB or SD playing mode, push it and
hold to enter the fast rewind mode. In Bluetooth or FM mode, push it and hold to decrease volume.
(2G) Next/ : Push this key and release, play the next song. In USB or SD playing mode, push it and
hold to enter the fast forward mode. In Bluetooth or FM mode, push it and hold to increase volume.
(2H) The U-disk connector.
2. Mp3 Player
3. Master Level Control
A rotated knob to control the level of the master output, and send the master output signal to the inside amplifier.

14. Power Led, Fault Led And Signal Level
The Power Led indicates the AC power supply.
The Fault Led indicates load-short, zero-offset over or over-heat.
7-segment Led meter indicates the master output signal level.
12. Chime-button
Pushing the CHIME button send a chime signal. The chime input with priority-function.
13. Mic1 Connector
4. Treble Control
A rotated knob to increase or lower high frequency of main mix. Turn this knob clockwise to boost high
frequency. The control has a shelving response giving 12dB of boost or cut at 10kHz.
6. Aux1/Mp3 Control
A rotated knob to control the level of the Aux1 and Mp3 input signals, and send the Aux1 and Mp3 signals
to the main mix.
15. Zone Knobs
Six rotatable band switches, to control the 6 zone outputs volume in 5 steps.
5. Bass Control
A rotated knob to increase or lower low frequency of main mix. Turn this knob clockwise to boost low
frequency. The control has a shelving response giving 12dB of boost or cut at 100Hz.
7. Aux2 Control
A rotated knob to control the level of the Aux2 input signals, and send the Aux2 signal to the main mix.
8. Aux3 Control
A rotated knob to control the level of the Aux3 input signal, and send the Aux3 signal to the main mix.
9. Mic1 Control
A rotated knob to control the level of the Mic1 input signal Mic1, and send the signal to the main mix.
10. Mic2 Control
A rotated knob to control the level of the Mic2 input signal Mic2, and send the signal to the main mix.
11. Mic3 Control
A rotated knob to control the level of the Mic3 input signal Mic3, and send the signal to the main mix.
The Mic1 connector accepts a XLR or TRS type phone jack on front panel. Please use a low impedance
microphone and a properly wired cable for best results. The Mic1 input with priority-function.

24. Zone Output
23. Com Output Socket
Common pole for PA or passive connection.
25. Power Input Connector With Fuse
Connect the power input connector to your AC power outlet( with
a suitable power cord. Do not bend, twist, pull or heat the power cord. Do not place heavy objects,
including this amplifier, on top of the power cord. A damaged power cord may cause fire or electrical
shock.
with the voltage AC230V/50Hz only)
A terminal strip provides six groups of zone output, and with maximum 100V voltage.
19. Aux Out
Aux output recording devices or mixing amplifiers.provides line-level signal to other device, such as:
20. 100V Output
100V output binding post provides power output to your PA-speakers with maximum voltage 100V.
22. 4-16 Output
4-16 output binding post for connecting your passive speaker-system.
21. 70V Output
70V output binding post provides power output to your PA-speakers with maximum voltage 70V.
18. Aux1, Aux2 And Aux3 Inputs
These inputs (with RCA sockets) accept line-level sources, such as: CD player and so on.
REAL PANEL DESCRIPTION
17 18 19 20 21 22 23
24 25
16
16. Mute Control
Mic1 and Chime input with priority-function, mute other input automatically. This control signal attenu-
ation between 0 and -30dB.
17. Mic2 And Mic3 Inputs
Connect your microphones here with 6.35mm jack-plug.
Please use a low impedance microphone and
a properly wired cable for best results.

TECHNICAL PARAMETER
Signal
/noise
Ratio:
70V, 100V or 4-16
120W, RMS 180W, RMS 250W, RMS 350W, RMS 500W, RMS
5mV, 600 ohm
300mV, 10k ohm
80 Hz - 16 kHz
0.5 % (1 kHz)
85 dB
116 dB
Carton
dimensions 540*417*165 540*450*165 540*486*165
Weight
Aux
Mic
Distortion
Frequency
Range
Line Input
Mic Input
Output Type
Output Power
Model
650W, RMS
11kg 12kg 14kg 16kg 18kg 20kg
ST2120BC ST2180BC ST2250BC ST2350BC ST2500BC ST2650BC

CONNECTIONS
ONON
OFF
OFF
ONON
OFF
OFF