Monitor audio RADIUS owners Manual
Contents
Page
Contents/ Introduction 1
Important Safety Instructions 2
Radius 45 3
Radius 90 4
Radius 180 5
Radius 45/90/180 Wall Bracket Fixing 6
Radius 225 7
Radius 250 8
Radius 225/250 Wall Bracket Fixing Instructions 9
Radius 270 10
Radius 360 & Radius 720 11
Fine Tuning & Trouble Shooting the Radius 360 & 720 14
System Wiring Configurations 15
Ancillary Equipment/ Guarantee & Service 16
Claims Under this Guarantee 17
Introduction
Congratulations on purchasing Monitor Audio loudspeakers. We are confident they
will provide a reliable, high performance sound for many years as only quality
components have been used throughout.
Monitor Audio are a highly respected member of the ‘Guild of Master Craftsmen’
with over 30 years of experience in the art of traditional wood working techniques
and leading edge drive unit technology. This blend of experience and technology
brings you the Radius Series.
Please follow this user manual carefully as it contains important information about
positioning and set up procedures. For further advanced information on system
set-up, FAQ’s and multi-lingual support please refer to our website at:
www.monitoraudio.co.uk
©Monitor Audio 2005 Rev 3
1
Important Safety Instructions
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus with water.
6. Clean only with a dry cloth. Great care and attention has gone into the
materials chosen to produce the Radius loudspeakers. A gentle wipe with a
dry, clean cloth is all that is required to remove any dust. Treat them as you
would a fine piece of furniture because that is how they have been designed.
7. Do not block any ventilation openings. Install in accordance with the
manufacturers instructions.
8. Do not install near any heat source, such as radiators, heat registers,
stoves, or other apparatus (including amplifiers) that produce heat.
9. Do not defeat the purpose of the polarised or grounding type plug. A
polarised plug has two blades with one wider than the other. A grounding
type plug has two blades and a third grounding prong. The wider blade or the
third prong are provided for your safety. If the provided plug does not fit your
outlet, consult an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particularly at
plugs, convenience receptacles, and the point where they exit from the
apparatus.
11. Only use attachments/ accessories specified by the manufacturer
12. Use only with the cart, stand, tripod, bracket, or table specified by the
manufacturer or sold with the apparatus. When a cart is used, use caution
when moving the cart/ apparatus combination to avoid injury from tip-over.
13. Unplug this apparatus during lightening storms, or when unused for long
periods of time.
14. Refer all servicing to qualified service personnel. Servicing is required
when the apparatus has been damaged in any way, such as power supply
cord or plug is damaged, liquid has been spilled or objects have fallen onto
the apparatus, the apparatus has been exposed to rain or moisture, does not
operate normally or has been dropped.
15. This apparatus shall not be exposed to dripping or splashing water and that
no object filled with liquids such as vases shall be placed on the apparatus.
16. This exclamation point within an equilateral triangle is intended to alert the
user to presence of important maintenance (servicing) instructions in the
literature accompanying the appliance.
©Monitor Audio 2005 Rev 3
2
nit
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 15. 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.
Frequency
Response
120 Hz –
22 KHz
Impedance
Bass
Alignment
Sealed
Cabinet
Nominal
8Ω 87dB 101dBA 25W 50W 5-25 W
Sensitivity
(1w@1m)
Drive U
Complement Bass
1 x 3” MMP 2 (Second
generation metal matrix
polymer)
©Monitor Audio 2005 Rev 3
Maximum
SPL
Drive unit
Complement
Tweeter
1 x 20mm C-
CAM gold dome
tweeter. Rear
firing.
3
Power
Handling Full
Range
(R.M.S)
Dimensions
9.5 H x 9.5 W
External
(cm)
x 9.5 D
System
Power
Handling
(R.M.S)
Recommended
Weight Kg
(each)
0.95
Amplifier
Requirements
Positioning
Technical Specification
The Radius 90 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 90 to a wall by using the high-quality metal alloy wall bracket provided,
or by purchasing the specially designed bespoke Radius Floor Stand from your
local authorised Monitor Audio dealer. To fix your speaker to the wall, please refer
to the ‘Wall Bracket Fixing Instructions’ in the wall bracket carton. When using the
wall bracket, we do not recommend connecting the loudspeaker using 4mm plugs
into the ends of the terminals. Instead the connection can be made by unscrewing
the terminal cap and using the through hole. The terminal cap can be retightened
to provide a secure connection.
Configuration
The Radius 90 is extremely versatile and can be used in a number of system
configurations. It is fully magnetically shielded and can be positioned as close to a
TV as you wish. On it’s own it can be used in a two-channel stereo system for use
in a small room, or to provide background music in a kitchen or bedroom.
Alternatively the Radius 90 can be used as part of a Home Theatre system or
multi-channel audio set-up. The Radius 360 or 720 subwoofers can be used with
the Radius 90 to provide deep, powerful bass. Please refer to the section; ‘System
Wiring Configurations’ on page 15.
Grille Fitment
To help the Radius 90 fit into any life-style environment we include a choice of
silver and black grilles (silver and white with white Radius 90) as standard. You will
find the spare grilles 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.
Frequency
Response
85 Hz –
25 KHz
Nominal
Impedance
Bass
Alignment
Rear
ported
bass reflex
8Ω 87dB 105dBA 60W 100W 10-100 W
Sensitivity
(1w@1m)
Drive Unit
Complement Bass
1 x 4” MMP 2 (Second
generation metal matrix
polymer)
©Monitor Audio 2005 Rev 3
Maximum
SPL
Complement
1 x 25mm C-
dome tweeter
Drive unit
Tweeter
CAM gold
4
Power
Handling Full
Range
(R.M.S)
Dimensions
19 H x 12 W
External
(cm)
x 14 D
System
Power
Handling
(R.M.S)
Recommended
Weight Kg
(each)
2
Amplifier
Requirements
Positioning
Technical S
pecification
The Radius 180 can be positioned vertically (portrait) or horizontally (landscape).
The Radius 180 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 180 to a wall by using the high-quality metal alloy wall bracket provided,
or by purchasing the specially designed bespoke Radius Floor Stand from you
local authorised Monitor Audio dealer. To fix your speaker to the wall, please refer
to the ‘Wall Bracket Fixing Instructions’ in the wall bracket carton. When using the
wall bracket, we do not recommend connecting the loudspeaker using 4mm plugs
into the ends of the terminals. The connection can be made by unscrewing the
terminal cap and using the through hole. The terminal cap can be retightened to
provide a secure connection.
Configuration
The Radius 180 is extremely versatile and can be used in a number of system
configurations. It is fully magnetically shielded and can be positioned as close to a
TV as you wish. On it’s own it can be used in a two-channel stereo system as part
of a multi-channel audio/ Home Theatre system. The Radius 360 or 720
subwoofers can be used with the Radius 180 to provide deep, powerful bass.
Please refer to the section; ‘System wiring configurations’ on page 15.
Grille Fitment
To help the Radius 180 fit into any life-style environment we include a choice of
silver and black grilles (silver and white with white Radius 180) as standard. You
will find the spare grilles 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.
Frequency
Response
60 Hz –
25 KHz
Nominal
Impedance
Bass
Alignment
Front
ported
bass reflex
Sensitivity
(1w@1m)
8Ω 87dB 105dBA 60W 100W 10-100 W
Drive Unit
Complement Bass
1 x 4” MMP 2 (Second
generation metal matrix
polymer)
Maximum
SPL
Complement
1 x 25mm C-
dome tweeter
Drive Unit
Tweeter
CAM gold
Power
Handling Full
Range
(R.M.S)
Dimensions
35 H x 12 W
External
(cm)
x 9.5 D
System
Power
Handling
(R.M.S)
Recommended
Weight Kg
(each)
2.3
Amplifier
Requirements
5
©Monitor Audio 2005 Rev 3
Radius 45/90/180 Wall Bracket
WARNING: For safety reasons do not attempt to fix these speakers to your wall
if you are unsure of your ability to provide a secure and safe fixing. You will need to
determine where to fit the bracket and the structure of the wall. If unsure, please
obtain the services of a competent qualified tradesperson.
WARNING: Ensure that there are no water pipes, or electricity cables running
behind where the wall bracket is going to be secured. Work from secure steps and
avoid trailing wires.
To fix your radius product to it’s bespoke wall bracket please refer to the fixing
instructions found in the Wall Bracket Carton. These instructions give a well
detailed approach on fixing the bracket. A template is also provided for assistance.
NOTE: The bracket is NOT ceiling mountable
©Monitor Audio 2005 Rev 3
6
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