Features & Installation
03
Installation
IMPORTANT:
As with any electrical device that produces heat, it is very important that the unit is located in a position where it will receive adequate
ventilation. Under no circumstances should the ventilation slots at the top and rear of the unit be obstructed. If the unit is to be
mounted in a cabinet, ensure that cool air can circulate when the doors are closed. Ventilation slots or holes should be provided at
the top of any enclosed compartments enabling warm air to be expelled. The minimum requirements for the internal enclosure
dimensions are 500mm wide by 300mm high by 500mm deep.
Before placing the MRA-4 or MRA-2 on a shelf, ensure that the shelf can support the total weight of the equipment on it. Each MRA
amplifier weighs nearly 12kg and may need to be placed on a separate shelf if using more than one unit. It is also not recommended
to stack any more than three Systemline components, S4.3 or MRA units on top of one another.
MRA-4
AMPLIFIER 1
SIGNAL
SPEAKER
PAIR
SPEAKER
SWITCHING
TREBLE
BASS
LEVEL
POWER
2
1
M U L T I R O O M A M P L I F I E R
SPEAKER
SWITCHING
TREBLE
BASS
LEVEL
SPEAKER
PAIR
2
1
SIGNAL
POWER
AMPLIFIER 2
LINE IN
L I N E O U T
A M P 1
LINE IN
L I N E O U T
A M P 2
AMP 1 SPEAKERS
PA I R 1
PA I R 2
R
L
A M P 2 S P E A K E R S
PA I R 1
PA I R 2
R
L
MADE IN ENGLAND
SERIAL NO -
MRA4
MULTI CHANNEL ROOM AMPLIFIER
230V
50Hz
POWER CONSUMPTION 600W MAX
I M P O R TA N T: K E E P A L L V E N T S C L E A R O F O B S T R U C T I O N
R
L
BASS & TREBLE PRESETS
FOR SETTING THE BASS & TREBLE TO MATCH SPEAKERS
N.B.
FACTORY ADJUSTED FOR FLAT RESPONSE
LEVEL CONTROL
FOR PRE-SETTING THE MAXIMUM VOLUME LEVEL
SPEAKER SWITCHING
ALLOWS SWITCHING BETWEEN PAIR 1, PAIR 2 OR BOTH
POWER CONNECTION
COOLING FAN COVER
AMP 1 - LINE IN
FOR CONNECTION TO SYSTEMLINE CONTROLLER
AMP 1 - LINE OUT
FOR CONNECTION TO AN
ADDITIONAL AMPLIFIER
WHEN MANY PAIRS OF
SPEAKERS ARE REQUIRED
BFA SPEAKER CONNECTIONS
FOR SPEAKER PAIR 2
BFA SPEAKER CONNECTIONS
FOR SPEAKER PAIR 1
AMP 2 - LINE IN
FOR CONNECTION TO
SYSTEMLINE CONTROLLER
AMP 2 - LINE OUT
FOR CONNECTION TO AN ADDITIONAL AMPLIFIER
WHEN MANY PAIRS OF SPEAKERS ARE REQUIRED
MUSIC SENSING
COM-INPUT
I M P E DA N C E- 4 - 1 6
Ω
I M P E DA N C E- 4 - 1 6
Ω
230V T4AH 250V
110V T6AH 250V
ON/OFF
MRA-2
STEREO
SIGNAL
SPEAKER
SWITCHING
TREBLE
BASS
LEVEL
POWER
2
1
M U L T I R O O M A M P L I F I E R
AMPLIFIER
SPEAKER
PAIR
S P E A K E R S
PA I R 1
PA I R 2
LINE IN
L I N E O U T
A M P
R
L
R
L
MADE IN ENGLAND
SERIAL NO -
MRA2
STEREO ROOM AMPLIFIER
POWER CONSUMPTION 300W MAX
230V
50Hz
I M P O R TA N T: K E E P A L L V E N T S C L E A R O F O B S T R U C T I O N
BASS & TREBLE PRESETS
FOR SETTING THE BASS & TREBLE TO MATCH SPEAKERS
N.B.
FACTORY ADJUSTED FOR FLAT RESPONSE
LEVEL CONTROL
FOR PRE-SETTING THE MAXIMUM VOLUME LEVEL
SPEAKER SWITCHING
ALLOWS SWITCHING BETWEEN PAIR 1, PAIR 2 OR BOTH
POWER CONNECTION
COOLING FAN COVER
LINE IN
FOR CONNECTION TO SYSTEMLINE CONTROLLER
LINE OUT
FOR CONNECTION TO AN ADDITIONAL AMPLIFIER
WHEN MANY PAIRS OF SPEAKERS ARE REQUIRED
BFA SPEAKER CONNECTIONS
FOR SPEAKER PAIR 2
BFA SPEAKER CONNECTIONS
FOR SPEAKER PAIR 1
MUSIC SENSING
I M P E DA N C E- 4 - 1 6
Ω
230V T3.15AH 250V
110V T5AH 250V
ON/OFF
POWER SWITCH
POWER SWITCH
LEVEL CONTROL
FOR PRE-SETTING THE MAXIMUM VOLUME LEVEL
MUSIC
SENSING SELECTOR
MUSIC SENSING &
COMMON INPUT SWITCH
MRA-2 & MRA-4 Installation Manual
Configuration and Set-up
06
Using the MRA-4 and MRA-2 with non Systemline sources
The MRA-4 and MRA-2 have been designed for all custom install applications where high performance and features are demanded. Both
units will interface to most line level outputs from audio sources and source control products. If required it is even possible to connect
sources such as a CD player directly to the LINE IN sockets and have a fixed volume, or if the CD player has a variable output or is connected
via a Pre-Amplifier then variable volume is possible.
S P E A K E R S
PA I R 1
PA I R 2
LINE IN
L I N E O U T
A M P
R
L
R
L
MADE IN ENGLAND
SERIAL NO -
MRA2
STEREO ROOM AMPLIFIER
POWER CONSUMPTION 300W MAX
230V
50Hz
I M P O R TA N T : K E E P A L L V E N T S C L E A R O F O B S T R U C T I O N
MUSIC SENSING
I M P E DA N C E- 4 - 1 6
Ω
230V T3.15AH 250V
110V T5AH 250V
VARIABLE OUTPUT CD
OUT
S P E A K E R S
PA I R 1
PA I R 2
LINE IN
L I N E O U T
A M P
R
L
R
L
MADE IN ENGLAND
SERIAL NO -
MRA2
STEREO ROOM AMPLIFIER
POWER CONSUMPTION 300W MAX
230V
50Hz
I M P O R TA N T : K E E P A L L V E N T S C L E A R O F O B S T R U C T I O N
MUSIC SENSING
I M P E DA N C E- 4 - 1 6
Ω
230V T3.15AH 250V
110V T5AH 250V
PRE-AMP
OUT
OR
CD
MRA
MRA
FIXED OUTPUT CD
OUT
ON/OFF
ON/OFF
R
L
R
L
R
L
IN
R
L
CD player connected to Amp
LINE IN Right & Left Inputs
