Ekars ERM-2120 - Front Panel I

Front Panel I
4
1. Main Power Switch - Power "ON" and "OFF" procedure.
Please turn on this rocker switch before operating the ERM-2120, 2240, 2320 series
remote amplifier. The "POWER" green color LED is indicating when enclosed external
24VDC/1A DC adapter working properly.
All electrical function will be ready within 2 second causing start initialize circuit.
Should be reset(turned off) all of "ZONE SELECTOR" switch before acting power switch
on or off to avoid any audible pop noise via connected extra PA equipment.
2. 4-dot Bargraph LED VU Meter - Displaying audio signal output level.
Each LED is tracing signal output level that comes from MIC and CHIME signal.
Please make adequate mic and chime level controlled by each potentiometers.
We recommend that bargraph LED should display range over than -10dB
for below than +6dB LED indication.
3. CHIME Level - CHIME signal output level control.
Please fixed level refer to bargraph LED VU(below than 0dB, when the chime signal
make peak value)or destination speakers chime SPL. 4-Notes chime sound is useful
for pre announcement. It is not necessary to make big sound volume.
4. LM and HM EQUALIZER - Low MId(500Hz) and High MId(5KHz)band equalizer.
The mid band equalizer can easily make clear sound against absorbing or reflecting
energy from sound field. Center flat point and +/-12dB adjustable peaking resonance
type equalizer.
5. MIC Gain Control - Mic headamp boost gain control
This potentiometer can cover level of entire dynamic microphone sensitivity.
The maximized boost gain is up to +60dB(CW), minimum +10dB(CCW) that continually
controlled end to end point. Please make the boost gain of attached gooseneck
microphone refer to bargraph LED indicating status. Normally, can find ideal point of
boost gain between +30dB and +50dB scale of mic gain potentiometer.
6. MIC input connector - XLR jack or 1/4" Phone jack acceptable.
Please find enclosed gooseneck microphone and properly couple with this connector.
Enclosed microphone that has uni directional acoustic axis characteristics should
made on axis and maintained adequate distance 50 to 100m/m between mic head
assembly and mouth.
-20
-20
+60dB
+60dB
GAIN
GAIN
CHIME
CHIME
-12dB
-12dB
+12dB
+12dB
+10dB
+10dB
10
10
0
-10
-10
0
+6
+6
dB
dB
0
LM
LM
HM
HM
EQ
EQ
LEVEL
LEVEL
-12dB
-12dB
+12dB
+12dB
0
20
20
30
30
40
40
50
50
2
4
6
8
PUBLIC ADDRESS REMOTE AMPLIFIER ERM-2320
MIC
MIC
LEVEL
LEVEL
POWER
POWER
12
3
B
PUSH
12
3
4
5
6