MA120 - MA240 Instruction manual

MA120 - MA240
Instruction manual
MA120 / MA240 Instruction manual
MA120 / MA240 manual
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Mixing amplifiers
Safety instructions
• C
aution! This professional device needs to be installed by
qualified personnel only.
• P lease check the carton box for any kind of damage on
reception of the goods. In case of a damaged carton, please
contact your dealer before opening the carton.
• ! !!! Danger !!!! Exposure to high sound levels may cause a
permanent hearing loss. Individuals vary considerably to sound
pressure level induced hearing loss but nearly everyone will
lose some hearing if exposed to high sound pressure levels for
a sufficient amount of time. Therefore it is recommended that
all persons exposed to equipment capable of producing high
sound pressure levels, such as this amplifier, be protected by
hearing protection while installing or operating this unit.
• Read all documentation before operating your equipment.
• Keep all documentation for future reference.
• S ave the carton and packing material even if the equipment has
arrived in good condition.
• S hould you ever need to ship the unit, use only the original
factory packing.
• Do not spill water or other liquids into or on the unit.
• M
ake sure power outlets conform to the power requirements
listed on the back of the unit.
• D
o not use the unit if the electrical power cord is frayed or
broken.
• A
lways operate the unit with the AC ground wire connected to
the electrical system ground.
MA120 / MA240 Instruction manual
• D
o not connect the inputs / outputs of amplifiers or consoles
to any other voltage source, such as a battery, mains source, or
power supply, regardless of whether the amplifier or console is
turned on or off.
• P ower down & disconnect units from mains voltage before
making connections.
• D
o not use the unit near stoves, heat registers, radiators, or
other heat producing devices.
• D
o not operate equipment on a surface or in an environment
which may distort the normal flow of air around the unit. If the
unit is used in an extremely dusty or smoky environment, the
unit should be periodically “blown free” of dust.
• D
o not remove the cover. Removing the cover will expose you
to potentially dangerous voltages.
• D
o not drive the inputs with a signal level higher than that
required to drive equipment to full output.
• Do not run the output of any amplifier back into another input.
• In case of mal-function this device should be serviced by
qualified service personnel only.
• T his unit has NOT been designed for use in mobile applications,
such as: mobile discobars, mobile PA systems, Live bands, audio
rental systems, …
C A U T IO N
TO REDUCE THE RISK OF ELECTRIC SHOCK
DO NOT REMOVE COVER OR BACK
NO USER-SERVICEABLE PARTS INSIDE
SERVICING ONLY FOR QUALIFIED PERSONNEL
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Mixing amplifiers
Introduction
“Setting a new industry standard”
When we, at Apart, look at mixing amplifiers today it seems like the
complete pro audio industry slumbered. Stuck into old habits, the
overall look and feel remains a hassle for both users and installers
worldwide.
Thanks to excessive research and input from our partners, our
R&D department together with a world leading design company
succeeded in redefining the look of the “mixing amplifier” as we
know it today.
The new and revolutionary Apart MA120/240 mixing amplifier
offers the end-user an unseen cutting edge design and ease of use.
The groundbreaking front panel is clear and easy to use without any
unnecessary bells and whistles.
The refreshing rear panel will give every installer an instant
gratification due to the sheer and logic design.
Together with an unprecedented connectivity and immaculate
sound performance this reliable mixing amplifier is the new
standard in the fixed install audio market.
MA120 / MA240 Instruction manual
Features
• 19” rack unit, 2U high with removable rack ears.
• High power class-D power amplifier module with 100 volt / 70
volt / 4 ohm output connectivity.
• Output power
- MA120: 1 x 120 W @ 70 V / 100 V / 4 ohm.
- MA240: 1 x 240 W @ 70 V / 100 V / 4 ohm.
• High thermal efficiency.
• PREAMP output and REC output.
• Patented front panel designed to give an intuitive user
interface.
• Front control for end-user and back panel for configuration
installer (out of reach of end-user).
• Universal switching mode power supply.
• Auto standby mode (can be switched off) with < 0.5W standby.
• 24 volt DC / 500 mA priority output.
• Dedicated emergency input with vox and mute all switch.
• Paging mic input with contact closure.
• 2 front panel operated mics: mic A with switchable vox.
• 4 line inputs on RCA.
• Signal clip indicators and gain control on all inputs for fast and
easy configuration of the input gain.
• Status leds on the front panel with led VU meter.
• No cooling fan – maintenance free.
• Extended speaker and amplifier protection circuits : over current
protect, over temperature protect, APC clip limiter.
• 4 priority levels for audio routing.
• Isolated emergency input.
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Mixing amplifiers
Connections
1
2
3
4
5
6
7
8
9
13
10
11
12
14
1. Emergency input: connect your balanced 0 dBV line level emergency
input to the euroblock connector. If available, connect the emergency
contact to the “mute all” connection. The contact must be “potential
free”, i.e. a relay or switch contact that does not carry any voltage.
Alternatively, activate the “vox” circuitry by turning the vox control
until you hear an audible “click”. Now turn the vox control up
while playing music until the vox circuit is activated. The vox and
the mute all switch have the same function: they will mute all other
sources, and will wake up the unit from standby (auto standby and
front button standby). The emergency level can be set with the
volume control. If the clip led lights up when the emergency signal
is present, lower the level of the emergency signal at the source to
avoid distortion. Activating the emergency input will also activate the
priority output (11).
2. Paging mic input: connect your paging mic here: the input accepts
microphone level signals on balanced euroblock, line level signals
on balanced euroblock or RCA. Set the mic/line switch accordingly.
Adjust the gain control so that the clip led does not light up when
the signal is at its highest level. Then set the volume control as
desired. When the paging contact is closed, all other sources (except
emergency input) will be muted, and the chime will sound. Set the
chime level as desired. The paging contact will also activate the
priority output (11). To test the chime level, a chime test button is
present.
MA120 / MA240 Instruction manual
3. MIC A input: connect a microphone here: the euroblock accepts
balanced microphone or line level signals and RCA. Set the mic/line
switch accordingly. Phantom power (48 V) can be applied to the
balanced euroblock by pushing the phantom power switch. The led
beneath the switch will be lit when phantom power is present. Adjust
the gain control so that the clip led does not light up when the signal
is at its highest level. If necessary, activate the vox circuitry by turning
the vox level control until you hear an audible “click”. Now turn the
vox potmeter up until the vox circuit is activated. The MIC A volume
can be set using the front panel potmeter (2). MIC A can be activated
by pressing the MIC A select switch on the front panel (3). The vox
circuit, when activated, will attenuate (30 dB attenuation) all lower
priority sources (Mic B, input 1-4). MIC A has its own lo and hi eq
controls. MIC A input is compatible with the local input panel that
requires phantom voltage.
4. MIC B input: connect a microphone here: the euroblock accepts a
balanced microphone signal and RCA. The led beneath the switch
will be lit when phantom power is present. Adjust the gain potmeter
so that the clip led does not light up when the signal is at its highest
level. The MIC B volume can be set using the front panel potmeter
(9). MIC B can be activated by pressing the MIC B select switch on
the front panel (10). When selected, the MIC B signal will be mixed
together with a signal present on line input 1-4. MIC B has its own lo
and hi eq controls.
5. Input 1: line level input on RCA connectors. Adjust the gain control
so that the clip led does not light up when the signal is at its highest
level.
6. Input 2: line level input on RCA connectors. Adjust the gain control
so that the clip led does not light up when the signal is at its highest
level.
7. Input 3: line level input on RCA connectors. Adjust the gain control
so that the clip led does not light up when the signal is at its highest
level.
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Mixing amplifiers
8. Input 4: line level input on RCA connectors. Adjust the gain control
so that the clip led does not light up when the signal is at its highest
level.
9. Input 1-4 eq: lo and hi controls for line inputs 1-4.
10. Auto standby: set the switch to “enabled” to enable auto standby.
The amplifier will go to auto standby after 10 minutes if no signal is
present current selected inputs.
11. Priority out: this connector will supply 24 VDC, max 500 mA when
priority is activated. Priority will be activated by the emergency switch
or emergency vox, or by the paging contact on the paging mic input.
Typically, 24 volt priority is used to override volume controllers present
on speaker lines.
12. Speaker out: speaker output connector on euroblock. Use the 4
ohm, or the 70 volt or the 100 volt output. Never use more than one
output at the same time.
13. Pre-outs: the preamp output carries the same line level signal that is
being fed to the power amplifier and is taken after the front panel
volume control (6) and the front panel mic level controls (2). The rec
out carries the same signal as the line out, but it is not influenced
by the position of the front volume button and the front mic level
buttons.
14. Main input connector and power switch: connect the mains power
cord here. Switch on the power switch to power up the unit. The
mains fuse is also located here.
Note: emergency vox or emergency switch and the paging contact will
mute all lower priority input signals. MIC A vox will attenuate all lower
priority input signals by 30 dB. This is also known as “voice over circuit”.
MA120 / MA240 Instruction manual
The chime can only be activated by closing the paging contact on the
paging mic.
As long as the chime sounds, the paging message will be muted, even if
the chime level is set to the minimum(off) level.
Do not use the priority output continiously at full power (24V, 0.5A).
IMPORTANT!
This amplifier relies on convectional cooling. In normal situations,
overheating will not occur due to the class D amplifier topology. Since
there are no cooling fans in the amplifier, make sure the convectional
cooling system can work properly. The unit can be built in a 19 inch rack
system using the included 19 inch brackets, but the ventilation holes
should never be blocked. Therefore, it is absolutely necessary to allow
at least one free rack space or 44 mm above the amplifier. Make sure
the ambient temperature is between 0 and 40°C. Operating the unit
beyond its normal limits may cause overheating. If necessary, use a forced
ventilation system in your mounting rack when the rack holds multiple
amplifiers.
The mains fuse is located in the mains inlet (14). When the fuse is broken,
replace it with a fuse of the same current and voltage rating:
- MA120: T 2 A L / 250 V.
- MA240: T 3.15 A L / 250 V.
For qualified personnel only!
Before using the amplifier for the first time, check the total impedance of
your speaker lines using an impedance meter: temporarily disconnect the
speaker line from the amplifier and measure the speaker line. Minimum
load impedance @ 100 volt must be 41.7 ohms or more. This value
corresponds to 240 watts @ 100 volt.
Minimum load impedance @ 70 volt must be 20.4 ohms. Do not use more
than 1 speaker output at the same time.
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Mixing amplifiers
Operation
1
2
3
4
5
6
7
8
1. O
n / Standby button and led: switch the standby ON / OFF with
this button. Please note that the main power switch at the rear
of the unit (14) must be switched on. Read more about standby
below. When the unit is on, the on/standby button led will light
up steadily. When the unit is in standby, the led will fade in /
fade out.
2. M
IC A/B volume control: this control determines the output
volume of MIC A/B.
3. M
IC A/B on/off switch: use this button to turn MIC A / B on
and off.
4. N
ame field: here you can attach the name stickers and the
name fields supplied with the unit.
5. Input 1 – 4 selection buttons: by pressing these buttons, you
can toggle between inputs 1 to 4, or switch off the selected
input by pressing the button that is lit. You can only select one
input at a time.
6. V
olume control: turn the control button clockwise to increase
the volume, counterclockwise to decrease. The volume control
sets the output volume of the selected input 1 – 4 only.
MA120 / MA240 Instruction manual
7. Status leds: Protect led lights up when an overload of the
amplifier occurs. The amplifier will be muted until the condition
is normal again. Emergency led will light up to indicate that an
emergency message is coming through. The paging led lights
up when the paging contact is closed. Vox MIC A will light up
to indicate that the vox circuit of MIC A is active. The vox circuit
will only be active if MICA is selected (front button 3).
8. O
utput VU meter leds: this led bar indicates the output level.
Avoid hitting the red zone!
Standby
The auto standby function can be enabled/disabled via a switch (10)
at the rear of the unit. The power/standby control led will slowly
fade in/out to indicate that standby is activated.
Basically, there are 2 standby modes:
• manual standby: activated by pushing the power button on the
front.
• auto standby: activated by the auto standby circuitry.
The unit will go to auto standby after 10 minutes when the
following requirements are fulfilled:
• Auto standby is enabled
• No audio signal is present on the SELECTED INPUT or MIC*
(or when no input is selected)
• No emergency signal is present and the vox is active or the
emergency contact is not closed
• The paging contact is not closed
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Mixing amplifiers
The unit will wake up from manual standby by any of the
following:
• Pressing the standby / power button.
• Activating the emergency input by the emergency vox or the
emergency mute all.
• Cycling the power using the rear power switch
(or a mains power interruption).
• Pushing any front panel button.
The unit will wake up from auto standby by any of the
following:
• Activating the previously selected sound source
(i.e. signal present on the previously selected input**).
• Pushing any front panel button.
• Activating the paging contact.
• Activating the emergency input by the emergency vox or the
emergency switch.
• Cycling the power using the rear power switch (or a mains
power interruption).
*Note: when the audio cable at the selected input is long and noisy,
the unit will not go to auto standby mode.
**The minimum required signal level required to wake up the unit
from auto standby is 2-10 mVrms for line inputs and
0.1 - 0.5 mVrms for microphone signals.
MA120 / MA240 Instruction manual
Practical example
Connecting the speakers
Example: 100 volt speaker line.
Connect the speaker line wires
as shown.
The 4 ohm and 70 volt connectors are not used. Connect the
common or speaker line ground wire to the COM connector.
Connect the 100 volt line to the 100 volt connector.
The minimum speaker line impedance is 83.3 / 41.7 ohms
(120 / 240W). Check the impedance with an impedance meter
before connecting the speaker line to the amplifier.
Note: never use more than one output at a time! Do not overload
the speaker output. In 70 and 100 volt speaker lines, the power of
all speakers in the chain must be added. The total power MUST be
lower than or equal to the amplifier’s output power. For example:
on a 240 watt 100 volt amplifier, you can connect 4 x 60 watt
100 volt speakers in parallel: 4 x 60 = 240 watts.
Always measure the speaker line with an impedance meter or
loudspeaker line watt meter
The loudspeaker out terminal is for class 3 wiring and presents a risk
of electric shock or a fire risk. The wiring must only be connected and
installed by a qualified person, the National wiring rules for installation of
class 3 wiring must be followed.
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Mixing amplifiers
Practical example
Connecting and setting up a paging microphone
1.Connect the microphone wire as shown in the picture.
The + - GND is used for the balanced signal of the microphone.
The paging contact closure is indicated in the picture.
mic signal
paging
contact
2.Set the mic / line
button to “MIC”.
3.Close the paging
contact.
MA120 / MA240 Instruction manual
4.While speaking in the microphone as loud as possible, turn the
gain control slowly clockwise until the clip led lights up at the
highest peaks. Now turn the control back a little. Open the
volume control until the paging message sounds as loud as
desired. Watch the output VU meter on the front of the unit
and make sure meter never hits the red zone.
5. Open the paging contact.
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Mixing amplifiers
6.Turn the chime potmeter about halfway, push the “test”
button to hear the chime and adjust the chime volume as
desired using the chime potmeter.
Note: the paging mic and chime levels are independent from the
position of the big volume control on the front of the unit.
The paging contacts must be potential free, i.e. no voltages should
be present on these connectors.
MA120 / MA240 Instruction manual
Practical example
Connecting a line source (tuner, CD player, ...) to input 1
1.Connect the output of
the line source to the
cinch connectors of
input.
2.While the line source is
playing, turn the gain
control on input 1 slowly
clockwise until the clip led
lights up at the highest
signal peaks. Now turn the
control back a little.
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Mixing amplifiers
3.Select “INPUT 1” on the front panel. Turn up the big volume
control on the front panel to hear the selected source through
the speaker(s).
Note: use the gain control also to equalize the level differences
between sources. For example, if the CD player plays “louder” than
the radio, turn the gain control of the CD player a little lower to
compensate for the difference in output level.
When a stereo source is connected, the signals of the left and right
inputs will be mixed to mono.
warranty info
Warranty claims and claims for hidden defects can be considered only if the
defects appear within the warranty period of 24 months and are notified
within 8 days following their appearance per registered letter. The warranty
is not valid in case of an incident, wear, for moving parts, power surges,
inadequate packing or shipping, improper use or storage and the disregard of
recommendations of Apart Audio. The warranty only concerns the spare parts
and not the involved labor, transportation or any other costs. The product
must be returned in the original packaging with the proof of purchase by an
Apart-Audio authorized reseller.
The general terms and conditions can be found here:
http://www.apart-audio.com/conditions/General_Terms_and_Conditions_
Apart_Audio.pdf
MA120 / MA240 Instruction manual
Technical specifications
Product name
MA120
MA240
Emergency input
Nominal input sensitivity
0 dBV (1 Vrms)
THD+N @ -6dB (pre-out)
< 0.5%
Frequency response (-3dB)
45 Hz – 20 kHz
Input impedance
5 kohms
Paging mic
Nominal input sensitivity bal. mic
(gain max)
-50 dBV (3 mVrms)
Nominal input sensitivity bal. line
(gain max)
-12 dBV (250 mVrms)
Nominal input sensitivity unbal. line
(gain max)
-12 dBV (250 mVrms)
THD+N @ -6dB (pre-out)
< 0.4 %
Frequency response (-3dB)
bal mic: 165 Hz – 20 kHz
unbal, bal line: 20 Hz – 20 kHz
Gain
-15 to +15 dB
Length chime
2s
Input impedance
2 kohms
Mic A / Mic B
Nominal input sensitivity bal. mic
(gain max)
-50 dBV (3 mVrms)
Nominal input sensitivity bal. line
(gain max)
-12 dBV (250 mVrms)
Nominal input sensitivity unbal. line
(gain max)
-12 dBV (250 mVrms)
THD+N @ -6dB (pre-out)
< 0.2%
Frequency response (-3dB)
bal mic: 165 Hz – 20 kHz
unbal, bal line: 20 Hz – 20 kHz
LO EQ
+-10 dB @ 100 Hz
HI EQ
+-10 dB @ 10 kHz
Phantom
Voltage: 48 V
Vox attenuation MicB, Input 1-4
30 dB
Input impedance
2 kohms
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Mixing amplifiers
Product name
MA120
Input 1-4
Nominal input sensitivity unbal. line
(gain max)
THD+N @ -6dB (pre-out)
Frequency response (-3 dB)
LO EQ
HI EQ
Input impedance
MA240
-12 dBV (250 mVrms)
< 0.1%
20 Hz – 20 kHz
+-10 dB @ 100 Hz
+-10 dB @ 10 kHz
10 kohms
Priority output
Voltage
Max current
24 V
0.5 A
RMS output power (1% THD)
Dynamic power
SNR (1% THD)
THD+N @ -6 dB
Cooling
Amplifier protection
Nominal output level
Amplifier output
120 W
150 W
> 90 dB
< 0.5 %
240 W
280 W
> 90 dB
< 0.5 %
convection
temperature, overcurrent, overvoltage, undervoltage
PRE-out / REC-out
0 dBV (1 Vrms)
0 dBV (1 Vrms)
Power supply
Max power consumption
160 W
Idle power consumption
12.5 W
15 W
Standby power consumption
0.5 W
0.5 W
Power supply
320 W
100 V - 240 VAC (+-10%) / 50-60 Hz
Standby
Input trigger sensitivity to wake up
- 43 dBV (7 mVrms ± 10%)
Line 1 - 4
Mic A, Mic B, RCA
- 50 dBV (3 mVrms ± 10%)
Mic A, Mic B, Balanced (mic) (vox off)
- 74 dBV (0.2 mVrms ± 10%)
Emergency in (vox max)
- 46 dBV (5 mVrms ± 10%)
Time to auto standby
approx. 10 min
General
Dimensions amplifier (l x d x h)
43 x 29 x 8.9 cm
43 x 29 x 8.9 cm
Weight amplifier
5 kg
6 kg
Accessories
rack ears, power cable, manual, euroblock connectors,
sticker paper, feet
developed
by
Apart Audio nv
Industriepark Brechtsebaan 8 bus 1
2900 Schoten - Belgium
Company names, product names and trademarks are property of their
respective owners.
Apart-Audio specifications are subject to change without notice.
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