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© Monitor Audio 2005 Rev 2
Frequency
Response
Nominal
Impedance
Sensitivity
(1w@1m)
Maximum
SPL
Power
Handling Full
Range
(R.M.S)
System
Power
Handling
(R.M.S)
Recommended
Amplifier
Requirements
120 Hz –
22 KHz
8Ω 87dB 101dBA 25W 50W 5-25 W
Bass
Alignment
Drive U
nit
Complement Bass
Drive unit
Complement
Tweeter
External
Dimensions
(cm)
Weight Kg
(each)
Sealed
Cabinet
1 x 3” MMP 2 (Second
generation metal matrix
polymer)
1 x 20mm C-
CAM gold dome
tweeter. Rear
firing.
9.5 H x 9.5 W
x 9.5 D
0.95
Technical Specification
Positioning
The Radius 45 can be positioned on a shelf by fitting the rubber feet provided to
the underside of the speaker to stop vibrations. Alternatively, you can choose to fix
the Radius 45 to a wall by using the high-quality metal alloy wall bracket provided.
A specially designed Floor Stand can be purchased from your local authorised
Monitor Audio dealer for placement in free space (available soon). To fix your
speaker to the wall when using the wall bracket, please refer to the ‘Wall Bracket
Fixing Instructions’ in the wall bracket carton.
Configuration
The uniquely designed, ultra compact Radius 45 has been primarily designed as a
satellite speaker for use in a multi-channel audio or video system. Combined with
the Radius 360/720 subwoofer, the Radius 45 forms an extremely discreet system
that can be wall or stand mounted to fit in with a modern lifestyle environment. The
rear firing gold C-CAM tweeter is able to spread the sound around the room to
create a wide sound-stage, giving the apparent performance of a much larger
speaker system. Please refer to the section; ‘System Wiring Configurations’ on
page 14. NOTE: When used with an A/V receiver amplifier or processor the
speaker setting should be set to ‘small’ and the crossover frequency set to 120Hz.
If the receiver only has a 80/100 Hz setting it must be noted that the overall power
handling and maximum sound pressure level will be reduced.
NOTE: The Radius 45 is fitted with a PTC device. This protects the drive unit and
tweeter from being over driven. The PTC is a thermal device. When too much
current is passed through it, it gets hot and trips out. If the sound should suddenly
cut out, please turn your system off and allow the PTC to cool down. After a short
while you can then turn your system back on again. If the PTC does trip, turn the
volume down slightly to help prevent it happening again.
Grille Fitment
To help the Radius 45 fit into any life-style environment we include a choice of
silver and black grilles (silver and white with white Radius 45) as standard. You will
find the spare grille enclosed within the polystyrene packaging end caps.
If you wish to change the grille colour, you can do this by carefully removing the
grille, using your fingers to gradually pull the existing grille off the cabinet. To fit a
grille, ensure the badge is correctly orientated and gently press the grille into place.