Cyrus Power User manual

UserInstructions
CyrusPower

Cyrus Power Amplifier
1English

INTRODUCTION Cyrus Power Amplifier
English 2
Congratulations on the purchase of your
Cyrus Power. This piece of equipment is a precision
manufactured state-of-art product, constructed to the
highest standards and specifications. This manual contains
installation and operating instructions to enable you to
connect up and operate the amplifier correctly, ensuring
the greatest satisfaction and long term use. This
instruction manual is divided into seven sections.
•
••
•Cautions
•
••
•Installation
•
••
•Operation
•
••
•Additional Information
•
••
•Trouble Shooting
•
••
•Specifications
•
••
•Guarantee
To enable you to make full use of the comprehensive
facilities of the amplifier we suggest that you read these
sections which will explain the fundamental operations of
the unit.
CAUTION
POLARISED CONNECTOR (115V PRODUCTS ONLY)
To prevent electrical shock, match wide blade of plug to wide
slot and fully insert
Attention: Pour éviter les chocs électriques, introduire la lame la
plus large de la fiche dans la borne correspondante de la prise et
pousser jusqu'au fond.

Cyrus Power Amplifier CAUTIONS
3English
Your Cyrus Power is factory set to operate from a fixed
mains supply voltage, which is marked on a label at the
rear of the unit. Before connecting, check that this voltage
is the same as your mains supply, i.e.
230V Products Voltage Range 220V-240V
115V Products Voltage Range 110V-120V
UNPACKING
Always follow the instruction handbook and retain it in a
safe place for future reference.
Before proceeding with installing the Cyrus Power, ensure
that the following items are included in the accessory box:
•Instruction Manual with Guarantee Card
•Power Cable
•4 Loudspeaker Plugs
After removing these items, please retain the packing for
future use.
LOCATION
Install the amplifier in a well ventilated location where it
will not be exposed to high temperature or humidity.
Avoid installing the Cyrus Power in a location which is
exposed to direct rays of the sun, or near to hot appliances
or radiators. Placing and using the amplifier for long
periods on heat-generating sources will affect
performance and may damage the cabinet. Installation in a
damp or dusty environment may result in a malfunction or
an accident.
RE-LOCATION
The Cyrus Power is supplied ready for use in your
location. Care has been taken to ensure that the power
supply requirements are correctly set. Consult your
Mission distributor to arrange for conversion of your
Cyrus Power should you move to another area with a
different mains voltage supply.
PRECAUTIONS REGARDING INSTALLATION
It is important not to allow any liquid or foreign object fall
into this unit. When routing the power cord avoid running
it over or near sharp objects.
If the amplifier is not to be used for a long period of time,
unplug the unit from the mains power supply.
This unit contains no user serviceable parts, therefore
never remove any panels from the unit or attempt to
service the unit. In the unlikely event of failure, please
refer to qualified service personnel.

INSTALLATION Cyrus Power Amplifier
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Fig.1 Amplifier (rear view)
1. -MBLOC Speaker output
2. Right Speaker output (Stereo)
3. STEREO/MBLOC Selector
4. Chain Output
5. RCA Input
6. RCA/BAL Input Selector
7. BAL Input
8. MC-BUS System Connection
9. Left Speaker output (Stereo)
10. +MBLOC Speaker output
11. Power switch
12. Mains Fuse
13. Power Inlet
14. PSX-R Connection

Cyrus Power Amplifier INSTALLATION
5English
POSITIONING THE UNIT
The Cyrus Power may be positioned as a free standing
unit or alongside another piece of audio equipment. Never
stand the Cyrus Power under another unit. This may
adversely affect the efficient cooling of the Cyrus Power.
Never place the Cyrus Power on a carpet or similar
material which may hamper normal ventilation.
CONNECTING THE UNIT
The Mains Supply
The moulded IEC connector of the mains lead supplied
should be plugged in to the power inlet 13 on the rear of
the unit.
The mains fuse 12 is located on the rear panel next to the
power switch. It must only be replaced with the following
types:
U.K. / Europe - 230V T1A/20mm
N. America / Far East - 115V T2A/20mm
In the U.K., the Cyrus Power comes with the mains plug
fitted. In the unlikely event that the plug fuse should need
replacing ensure that it is only replaced with a 3 Amp
Fuse.
IMPORTANT
NOTE TO USERS OF PSX-R WITH Cyrus Power
In order to use a PSX-R regulated power supply with the
Cyrus Power, certain internal adjustments must be made
to the Cyrus Power which can only be carried out by an
authorised Mission distributor or his agent. Connection
of the PSX-R to a Cyrus Power which is not correctly
adjusted will result in fault condition display on the
Cyrus Power. The Cyrus Power fault indication system
is fully described in the Cyrus Power handbook.
Connecting a PSX-R Power Supply (Optional)
If a PSX-R is to be used with the Cyrus Power, proceed to
connect the umbilical cord of the PSX-R to the 5-pin
Cannon input socket of the Cyrus Power. When correctly
fitted, the connector will latch into place in the socket.
Note that when a PSX-R is in use, both the PSX-R power
supply and the Cyrus Power will require mains power.
Note:
For more details on the PSX-R, please refer to the Cyrus
PSX-R Instruction Manual.

INSTALLATION Cyrus Power Amplifier
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STEREO AND DUAL MBLOC MODES
The Cyrus Power can be configured as either a stereo
50W per channel amplifier or as a single channel 100W
Mbloc mono amplifier. In Mbloc mode not only is there
an increased power advantage but also complete left and
right channel separation. The Cyrus Power is factory set
for stereo operation.
Note: In Mbloc mode a Cyrus PSX-R regulated power
supply is required for each amplifier, in Stereo mode the
PSX-R is an optional upgrade. Before connecting a PSX-R
power supply to the Cyrus Power, be sure to have your
amplifier converted by your dealer or an authorised Cyrus
service organisation.
Caution: When the Cyrus Power is installed for Mbloc
operation, connect the loudspeaker cable to the -MBLOC
1and +MBLOC 10 speaker terminals. Loudspeaker
switch boxes and other equipment should not be
connected to the output of the Cyrus Power in Mbloc
mode.
Refer now to the following section if the Cyrus Power is
to be used in a Stereo installation or to page 8 for Mbloc
system connections.
Note: Ensure all equipment is turned off before any
connections or disconnection's are made.
CONNECTION FOR STEREO SYSTEMS
Stereo Input connection options
Both RCA and balanced input connectors are available to
link the Cyrus Power to a Preamplifier. Recommended
connection options are shown to follow-
1. Bi-amplification with a Cyrus III- use a quality RCA
phono interconnect.
2. Installed next to a Cyrus Pre Preamplifier- use a
quality RCA phono interconnect.
3. Installed with a Cyrus Pre Preamplifier, but placed
next to the speakers- Use Balanced XLR interconnects.
4. Power amplifier for a Cyrus AV system- use a quality
RCA phono interconnect.
Note: In a system which supports both connection options
(such as Cyrus Pre/Cyrus Power), the above are
recommendations only and the final choice is made at
the discretion of the user.
Input Connection to the Cyrus Power using RCA
phono cables
Set the STEREO/MBLOC selector switch 3to Stereo
and the input selector switch 6to RCA. Connect a stereo
phono interconnect from the output of the preamplifier to
the Cyrus Power's RCA inputs 5.Be sure to observe

Cyrus Power Amplifier INSTALLATION
7English
colour coding of the plugs to keep left and right channels
correctly ordered.
Input Connection to the Cyrus Power using Balanced
XLR cables
Set the STEREO/MBLOC selector switch 3to Stereo
and set the input selector switch 6to BAL. Connect two
Balanced XLR interconnects, one each from left and right
Balanced outputs of the preamplifier to the Cyrus Power's
BAL inputs 7 .Ensure that left and right channels are
identified and connected at each end.
Connecting Loudspeakers for stereo operation
The left and right loudspeakers are connected to the rear
panel sockets 9and 2of the Cyrus Power respectively
using the plugs provided. First, fit the plugs to the
loudspeaker cables. Carefully note that the cable carries
marking or colours for polarity (+ and -) and may also be
marked for direction with an arrow. For correct operation,
it is essential that the (+ and - ) terminals of the amplifier
are connected to the corresponding (+ and -)
terminals of the loudspeakers. When fitting the plugs to
the cables be sure to line up (+ and -) at each end using the
red plug for the '+' and the black plug for the '-'. The
loudspeaker plugs can now be plugged into the amplifier
sockets.
Rear view of a typical Cyrus Pre &
Cyrus Power stereo system. Connect
either the RCA phono (black) or XLR
Balanced input connections (dark grey),
but never both together. Bi-wired
speaker connections are also shown
(light grey).

INSTALLATION Cyrus Power Amplifier
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CONNECTION FOR MONOBLOC SYSTEMS
Special considerations for Mbloc operation
For Mbloc operation, two Cyrus Powers are required, one
each for left and right channels. Two Cyrus PSX-R
regulated power supplies must also be installed, one for
each Cyrus Power. It is therefore essential to ensure that
both Cyrus Powers have been adjusted by your dealer for
PSX-R operation before installation. Note also from the
diagram opposite- In Mbloc mode, the Mbloc input socket
is also the left channel input of both Cyrus Powers and
that the right channel inputs are not used.
Connecting the PSX-R Power Supplies
It is advisable to connect the PSX-R power supplies before
making further connections to the power amplifiers.
Proceed therefore to connect the umbilical cords of the
PSX-Rs to each 5-pin Cannon input socket of the two
Cyrus Powers. When correctly fitted, the connector will
latch into place in the socket. Note that both the PSX-R
power supplies and the Cyrus Powers will require mains
power.
Mbloc Input connection options
Both RCA and balanced input connectors are available to
link the Cyrus Power to a Preamplifier.
Recommended connection options are shown to follow-
1. Mbloc Power amplifiers installed next to a Cyrus Pre-
use a quality RCA phono interconnect.
2. Mbloc Power amplifiers, installed with a Cyrus Pre,
but placed next to the speakers- use Balanced XLR
interconnects.
3. High power installation using Cyrus III as a
Preamplifier- use a quality RCA phono interconnect.
4. Power amplifier for a Cyrus AV system- use a quality
RCA phono interconnect.
Note: In a system which supports both connection options
(such as Cyrus Pre/Cyrus Power Mblocs), the above are
recommendations only and the final choice is made at the
discretion of the user.
Input Connection to Mbloc Cyrus Powers using RCA
phono cables
Set the STEREO/MBLOC selector switch of the left
Cyrus Power 3to MBLOC and set the input selector
switch 6to RCA. Connect a single phono interconnect
from the left output of the preamplifier to the MBLOC
RCA input of the left channel Cyrus Power 5. Repeat
this sequence to set the switches and connect the right
channel output from the preamplifier to the MBLOC RCA
input of the right channel Cyrus Power.

Cyrus Power Amplifier INSTALLATION
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Input Connection to Mbloc Cyrus Powers using
Balanced XLR cables
Set the STEREO/MBLOC selector switch of the left
Cyrus Power 3to MBLOC and set the input selector
switch 6to BAL. Connect a Balanced XLR interconnect
from the left Balanced output of the preamplifier to the
MBLOC Balanced input of the left channel Cyrus
Power 7. Repeat this sequence to set the switches and
connect the right channel output from the preamplifier to
the MBLOC Balanced input of the right channel Cyrus
Power 7.
Loudspeaker connection for Mbloc operation
Connect the left loudspeaker to the left Cyrus Power using
only the red panel sockets 1and 10 . First, fit the plugs
to the loudspeaker cables. Carefully note that the cable
carries marking or colours for polarity (+ and -) and may
also be marked for direction with an arrow. For correct
operation, it is essential that the (+MBLOC and -
MBLOC) terminals of the amplifier are connected to the
corresponding (+ and -) terminals of the loudspeakers.
When fitting the plugs to the cables be sure to line up (+
and -) at each end using the red plug for the '+' and the
black plug for the '-'. The loudspeaker plugs can now be
plugged into the amplifier sockets. Repeat for the right
channel Cyrus Power.
Rear view of a typical Cyrus Pre &
Cyrus Power mbloc system.
Connect either the RCA phono
(black) or XLR balanced input
connections (dark grey), but never
both together. Bi-wired loudspeaker
connections are also shown (light
grey).