Choice Select ST Series User manual

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 the one described in this manual, the product may suffer
damages and the guarantee becomes void. Furthermore, any other operation may lead to dangers like shortcircuit,
burns, electric shock, hearing loss etc.
Features
Front panel
1 Mic-connection on the front panel
with Priority-function
ST series with LCD player
4-16 Ohms output for connecting a passive
speaker-system for monitor, maximal output
power less than third of the rating power.
70 V, 100 V PA-outputs
1 Line-output
Fan-cooled
3 Mic and 3 Aux inputs
(1) Player or voice recorder module
(0) POWER SWITCH(turn on/off)
ST series with LCD_player, SM with LED_player, SR with voice recorder, and SE series without this module.
(2) MASTER LEVEL CONTROL
A rotated knob to adjusts the level of the master output.
(4) TREBLE-CONTROL
A rotated knob to increase or lower the HIs of the input signal.
(3) BASS-CONTROL
A rotated knob to increase or lower the LOWs of the input signal.
(5) AUX 1-3-CONTROL
3 rotated knobs to adjust the level of the 3 AUX input signals.
The level of player or voice recorder are to be controlled by the knob of AUX1.
(6) MIC 1-3-CONTROL
3 rotated knob to adjust the level of the 3 MIC input signals.
2 3 4 5 6 7 8 9 10 11 12
01
7-fold level indicator
Treble and bass control
Screw terminals of 6 zone outputs
Master-control
Protection-circuits: over current,
short circuit, turn-on delay
19"-dimensions for rack-mounting
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 located far away from high temperature, moisture and powerful electromagnetic field.
f. Clean the device only with a dry soft cloth.
NOTES
ST Series PAMixing Amplifier:
ST2060 - CHO3086
ST2120 - CHO3087
ST2250 - CHO3088

(7) MIC1 SOCKET
To connect microphones with jack-plug, a priority microphones.
(8) CHIME-BUTTON
(9) SIGNAL LED DISPLAY
(11) FAULT LED DISPLAY
(10) POWER LED DISPLAY
The display shows the master output signal.
The display shows load-short, zero-offset over or over-heat .
For -BC series, they are 6 rotatable band switches, to adjust 6 zone volumes in 5 steps.
For -B series, they are 6 pressed switches, to control 6 zones to be on or off.
(12) 6 ZONE KNOB
Rear panel
(13) MUTE-CONTROL
For signal attenuation between 0 and -30 dB.
(14) MIC 2-3 INPUT SOCKETS
Connect your microphone with 6.35mm jack-plug here. The signals can be controlled via the controls
MIC 2 and MIC 3.
(15) AUX 1-3 INPUT SOCKETS
Connect your AUX-sources here. The signals can be controlled via the controls AUX 1 to AUX 3.
(16) AUX OUT
Output sockets for connecting further mixing amplifiers.
(17) PA OUTPUT SOCKETS
Output sockets for connecting your PA-speakers.
(18) 4-16 . OUTPUT SOCKET
Output socket for connecting your passive speaker-system.
(19) COM OUTPUT SOCKET
(23) SCREW TERMINAL for grounding
Common pole for PA or passive connection.
(20) 6 ZONE OUTPUT CONNECTORS
For connecting zones CH-1 to CH-6
(21) FUSE HOLDER
Only replace the fuse when the device is disconnected from mains. Only use fuses of the same
rating and Power.
(22)AC-Connection
13 16 19
14 17 20 21 22 23
15 18
FUSE
230V~50Hz
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN!
TECHNICAL SPECIFICATIONS
Power supply
Output power
Output type
Output current
at 70 V
Output current
at 100 V
Mic input
Line input
Frequency range
Distortion
Signal
/Noise
ratio:
Aux
Mic
Carton dimensions
Weight
MODEL
FUSE
230 V AC,
50 Hz
250 W RMS
70 V, 100 V
or 4-16¦¸
3.6 A
2.5 A
5 mV, 600 Ohms
300 mV, 10 kOhms
80 Hz - 16 kHz
0.5 % (1 kHz) 0.5
85 dB
75 dB
550X455X180mm
30.87 lbs/14 kg
T5A/250V
ST2120/B/BC
ST2060/B/BC ST2250/B/BC
230 V AC,
50 Hz
230 V AC,
50 Hz
120W RMS60W RMS
70 V, 100 V
or 4-16¦¸
70 V, 100 V
or 4-16¦¸
1.4A
0.9A
1.0A0.6A
5 mV, 600 Ohms
5 mV, 600 Ohms
300 mV, 10 kOhms
300 mV, 10 kOhms
80 Hz - 16 kHz80 Hz - 16 kHz
0.5 % (1 kHz)0.5 % (1 kHz)
85 dB85 dB
75 dB75 dB
24.26 lbs/11kg20.39 lbs/9.25kg
550X425X180mm
535X375X175mm
21.06”x14.76”x6.89” 21.65”x16.73”x7.087” 21.65”x16.73”x7.087”
T2A/250V
T2A/250V
CHO3086 CHO3087 CHO3088