Quick Start Guide

(EN) Step 3: Getting
started
EUROCOM MA4008/MA4000M Getting started
Connections
MA4008 / MA4000M
Before terminating any wire,
turnallequipment o 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 Amplier 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 amplier
(4 Ω). 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 ampliers. Use
this function to connect external signal
processing equipment using the PREOUT
andAMPINconnections.
Set DIP switch 1-4 to the o
position to insert external
equipment to the LO-Zamplier
(use switch 1-3 for the HI-Zamplier).
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.
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 (o)position.
Power on the unit
Slowly raise the rear panel
GAINcontrol for the individual
input channels until the green
SIG LED illuminates.
Equalizer
MA4008
Raise the MASTER VOLUME
control to the 10 – 12
o'clockposition.
Slowly raise the front panel
INPUT LEVELCONTROLS for the
individual inputchannels.
Adjust the MASTER VOLUME to
the desired overall
listeningvolume.
Adjust the LO and HI
equalization controls to tailor
system bass and
trebleresponse.
For the MA4008, adjust the
BALANCE control to set the
relative volume level between
the 70 / 100 V loudspeakers and the
4–16Ωloudspeakers.
Basic background music / paging
system setup
The basic muting function lowers the
volume level of background audio by a
designated amount when the unit receives
a contact-activated mute signal.
Contact-Activated Muting
Shorting pins 1 and 4 of any one of the MIC/
LINE or TEL/PAGE 4-pin Euroblock
connectors activates the muting function.
These terminals can be used for connection
to a dedicated mute switch or contact
closure from external equipment.
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.
Set the 3-position slide switch
on INPUT 1 to MIC (center).
Connect a dynamic microphone
to MIC/LINE INPUT 1.
Wire a N/O (normally-open)
momentaryswitch to pins 1
and 4 of the 4-pin Euroblock
connector on INPUT 1.
Set the 3-position slide switch
on INPUT 5 to LINE (right).
Connect a line-level music
source to AUXINPUT 5.
Set the MUTE DEPTH control to
thefullcounterclockwise
position (noattenuation).
Adjust the background music to
the desired listening level using
the volumecontrol for
AUXINPUT 4 on thefront panel.
While speaking into the
microphone and activating the
attached MUTE switch,
adjustthe volume control for MIC INPUT 1
on the front panel and the MUTE DEPTH
control on the rear panel so the
announcement is clearly audible over the
background music.
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.
GND + - MUTE
1 2 3 4
MUTE PWR
COM VDC RVC
N/C
10K Ω
20 EUROCOM MA4008/MA4000M 21 Quick Start Guide