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20
EUROCOM MA4008/MA4000M
EUROCOM MA4008/MA4000M Getting started
Step 3: Getting
Connections
(EN)
MA4008 / MA4000M
started
Before terminating any wire,
turn all equipment off and
disconnect the AC power.
Make all appropriate audio and
power connections to the
MA4008 / MA4000M.
Set the input sensitivity
switches for the MIC/LINE inputs
to the appropriate position.
Select LINE for line-level signals, MIC for
mic-level signals, or PHTM when using
microphones that require phantom power.
MA4008 Amplifier Connections
Ensure the FUNCTION switches 3
and 4 are set to the ON position
when not using the PRE OUT /
AMP IN loop.
Ensure the loudspeaker power
requirement does not exceed
the HI-Z amp's available power
output. Add up the total transformer taps of
all the loudspeakers to be powered,
e.g., four 70 V loudspeakers using 10 W
transformer taps require 40 W of power.
Do not exceed 80 W for the MA4008.
Set the HI-Z MODE switch to
either 70 or 100 V to match the
system's loudspeaker
voltage requirement.
Ensure the loudspeaker
impedance does not exceed
(not less than) the minimum
load impedance of MA4008's LO-Z amplifier
Ω)
(4
. For example, two 8 Ω loudspeakers
connected in parallel equal a combined
impedance of 4 Ω.
MA4000M MAIN OUTPUT Settings
Set DIP switches 1-4 (MAIN OUTPUT 1) or 1-3
(MAIN OUTPUT 2) to MIC or LINE level.
Inserting external processing
(MA4008 only)
DIP switches 1-3 and 1-4 break the
normally connected signal chain between
the preamp and power amplifiers. Use
this function to connect external signal
processing equipment using the PRE OUT
and AMP IN connections.
Set DIP switch 1-4 to the off
position to insert external
equipment to the LO-Z amplifier
(use switch 1-3 for the HI-Z amplifier).
Connect the appropriate channel
PRE OUT jack to the processor's
line-level input connector.
Connect the processor's output
to the appropriate channel
AMP IN connector.
MA4008
Equalizer
Volume and Gain
Before powering up, set INPUT
LEVEL CONTROLS 1 – 8,
rear panel GAIN controls 1 – 8,
and MASTER VOLUME to the full
counterclockwise (off) position.
Power on the unit
Slowly raise the rear panel
GAIN control for the individual
input channels until the green
SIG LED illuminates.
21
Quick Start Guide
Raise the MASTER VOLUME
Set the 3-position slide switch
control to the 10 – 12
on INPUT 1 to MIC (center).
o'clock position.
Slowly raise the front panel
Connect a dynamic microphone
INPUT LEVEL CONTROLS for the
to MIC/LINE INPUT 1.
individual input channels.
Adjust the MASTER VOLUME to
Wire a N/O (normally-open)
the desired overall
momentary switch to pins 1
listening volume.
and 4 of the 4-pin Euroblock
connector on INPUT 1.
Adjust the LO and HI
equalization controls to tailor
Set the 3-position slide switch
system bass and
on INPUT 5 to LINE (right).
treble response.
For the MA4008, adjust the
Connect a line-level music
BALANCE control to set the
source to AUX INPUT 5.
relative volume level between
the 70 / 100 V loudspeakers and the
Set the MUTE DEPTH control to
4 – 16 Ω loudspeakers.
the full counterclockwise
Basic background music / paging
position (no attenuation).
system setup
Adjust the background music to
The basic muting function lowers the
the desired listening level using
volume level of background audio by a
the volume control for
designated amount when the unit receives
AUX INPUT 4 on the front panel.
a contact-activated mute signal.
While speaking into the
Contact-Activated Muting
microphone and activating the
attached MUTE switch,
Shorting pins 1 and 4 of any one of the MIC/
adjust the volume control for MIC INPUT 1
LINE or TEL/PAGE 4-pin Euroblock
on the front panel and the MUTE DEPTH
connectors activates the muting function.
control on the rear panel so the
These terminals can be used for connection
announcement is clearly audible over the
to a dedicated mute switch or contact
background music.
closure from external equipment.
1
2
3
4
GND
+
-
MUTE
Turn the MUTE depth control to the
full clockwise position for maximum
attenuation. To defeat the mute
function (0 dB attenuation), turn the
MUTE DEPTH control to the full
counterclockwise position.
REMOTE Wiring Detail
A standard 10K Ω linear taper
potentiometer can be connected for remote
volume control.
Momentary switches can be used to
remotely-control system mute and
power toggle.
10K Ω
N/C
MUTE PWR
COM VDC RVC
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