JTS CS-8 User Manual

7
Internal Setup
CS-8 Automatic Mixer has a substantial gain range, allowing it to accept a wide variety
of microphones. These settings are located inside the unit. Before setting, please
unplugged the power cord, and remove the two screws on each side of the unit, and then
remove the top cover. (Figure 1)
Preamplier Gain
MIC IN ATT (Factory pre-set is -10dB)•
The internal switches are located on the circuit board designated by “SW 17~24”, for
MIC 1~8 respectively. Moving the switch will change the gain by 10dB (From 0dB,
-10dB or -20dB).
Input attenuation switches (Factory pre-set is 0dB)•
Toacceptthe“line-level”input,thepreampliergainmaybereducedfurther.By
changing the switches designated by “SW 1~8”, it will cause 50dB gain reduction for
MIC 1~8 respectively.
Notice: Combination of mic in ATT and Input attenuation switches would reduce
sensitivity by up to 70dB for each MIC input.
Output Attenuation (Factory pre-set is at line-level of 0dB)
The internal switch are located on the circuit board designated by “SW35”. Changing the
setting to “MIC” would cause a 50dB reduction in output.
Microphone Attenuation (Factory pre-set is -10dB Comparing with priority mic)
If the number of microphones in use is high, it may increase the amount of “Microphone
attenuation” of each microphone to maintain the total ambient noise level low. The
“Microphone Attenuation switch” has three settings of -10dB, -15dB, and -20dB. The
internal switches are located on the circuit board (CS-8 Main) designated by “SW 25~32”.
Changing the setting to “-15 or -20” will cause the attenuation by “-15dB or -20dB”
respectively.
Phantom Power (Factory pre-set is “+48V”)
Each of “MIC input” supplies +48V phantom power. If it’s required to disable the phantom
power, change the setting of these switches to “OFF”. The switches are located in the
internal circuit board designated by “SW 9~16” for MIC 1~8 respectively.
RCA and MIC
This switch is to change the input between MIC1/MIC2 and RCA R/ RCA L.

JTS CS-8 Specifications

Power

power supply	18VDC, 1A
power consumption	18 Watts
fuse	1A 250V

Electrical Characteristics

voltage output	+4VDC±0.3V
phantom power	+48V
control voltage	+12V

Impedance

input impedance (mic)	4.7KΩ
input impedance (line)	20KΩ
output impedance (mic)	300Ω
output impedance (line)	200Ω

Audio Performance

maximum output level (line)	>+17 dB
maximum gain	≥70dB
frequency response	35~20, 000 Hz
thd% input (1 KHz -50dB)	<0.06%
signal-to-noise ratio	>70dB

Weight and Dimensions

weight	2.25kg
dimensions (length)	420.6mm
dimensions (width)	198.5mm
dimensions (height)	44.2mm