Cyrus aPA7.5 Mono Istruzioni per l'utente - Pagina 4
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User Instructions
Welcome to the world of Cyrus!
Congratulations on your choice of Cyrus Hi-fi products. Our state-of-the-art design
technology and outstanding quality of manufacture has won countless awards
around the world. We are confident that you will derive great pleasure from
owning a product from one of the most recognised and respected
manufacturers of hi-fi equipment.
Please read these instructions carefully before commencing installation. They
provide full guidance to help you install your aPA7.5 Mono safely and
correctly.
Preparations for Installation
Before installing the aPA7.5 Mono check that the following items are included
in the accessory box.
•
Power Cable
•
4 Loudspeaker plugs
•
2 MC-Bus cables
After removing these items, please retain the packaging.
Install the aPA7.5 Mono in a well ventilated location away from sources of high
temperature, dust or humidity. Never stand the aPA7.5 Mono under another
unit or on any surface likely to hamper its cooling or ventilation.
INSTALLATION
Key to the rear panel drawing (Fig.1):
1.
+ Speaker Outputs
2.
- Speaker Outputs
3.
Cooling Fan
4.
Balanced (BAL) Input
5.
RCA (phono)/BAL Input Selector 11
6.
Unbalanced RCA (phono) Input
Connecting to the AC Mains Supply
Connect the socket on the AC Power cable to the Power inlet i on the rear panel of
the aPA7.5 Mono. Now connect the cable to a suitable AC power point.
The mains power switch 1) on the rear panel of the aPA7.5 Mono should be
left on for normal operation, except when left unattended for a long period
when it should be switched off or disconnected from the AC supply.
Identifying System Channels
Each aPA7.5 Mono drives a single speaker. In a stereo system two aPA7.5
Monos are necessary, in an AV system, up to 5 aPA7.5 Mono amplifiers will
be necessary. Before proceeding to connect your amplifiers, take some time
to organise your system so that you can easily identify which amplifier will be
connected to each speaker.
Connecting a Pre-Amplifier or Surround Decoder
Phono (RCA) f and Balanced input connectors d are available to link the
aPA7.5 Mono to a pre-amplifier or surround decoder.
Phono (RCA) connections are recommended unless the aPA7.5 Monos are a
long distance from the pre-amplifier/decoder, or beside a loudspeaker, then
balanced XLR connections d may give improved performance.
All aPA7.5 Mono's must use the same method of input connection.
Input Connection via phono (RCA) interconnects
Set the input selector switch e to RCA. Connect a single phono interconnect
from the phono input f of each aPA7.5 Mono to the corresponding output of
the pre-amplifier/decoder.
In the system illustration Fig.4a, a Cyrus Pre aCA7.5 preamplifier is connected
to two aPA7.5 Mono amplifiers, one for the left channel and one for the right
channel. Input connections are shown using phono interconnects.
GB
GB
7.
Chain Output
8.
MC-Bus connections
9.
IEC Power Inlet
10. Mains Fuse Holder
Power Switch
Input Connection using Balanced XLR cables
Set the input selector switch e to BAL. Connect a 3-pin XLR cable from the
balanced input d of each aPA7.5 Mono to the corresponding XLR output of
the pre-amplifier/decoder.
Connecting Loudspeakers
Fitting the loudspeaker plugs
Check for polarity indicators (+ and -) on the loudspeaker cable and fit the
plugs provided. Observe any signal directionality markings indicated on the
cable. If an arrow is printed on the cable it should point toward the speaker.
If additional or replacement loudspeaker plugs are required for the aPA7.5
Mono ensure that the correct 'BFA' type are purchased.
Connecting the cables
After checking all the assembled cables for polarity they can be plugged into
the loudspeakers and amplifiers. The '+' and '-' terminals of each loudspeaker
must be connected to the matching '+' and '-' terminals of each amplifier as
follows-
Connect the left loudspeaker to the rear panel sockets a (red speaker plug)
and b (black speaker plug) of the left channel aPA7.5 Mono. Connect the right
loudspeaker to the rear panel sockets a red speaker plug) and b (black
speaker plug) of the right channel aPA7.5 Mono.
Dual outputs are provided for the convenient connection of bi-wiring speaker
cables. Fig.4a shows a wiring schematic for a bi-wired stereo system.
Chain Output
The Chain output g allows more than one aPA7.5 Mono to be connected to
each channel of a pre-Amplifier or decoder.
Note: The Chain output is operational whether phono (RCA) or Balanced XLR
input connection is made to the aPA7.5 Mono.
Bi-Amplification
The Chain facility can be used with two or more aPA7.5 Mono amplifiers per
channel, for Bi/Tri-amping by connecting the Chain output of the first aPA7.5
Mono to the phono inputs of the next aPA7.5 Mono. Such a bi-amplified
system provides the sonic benefits of totally separate power amplification for
the bass and treble units of the loudspeakers.
In the bi-amplified system illustration Fig.4b, a Cyrus Pre aCA7.5 preamplifier
is connected to four aPA7.5 Mono amplifiers - two for the left channel and two
for the right channel. Phono input connections are shown.
Note: The Chain output is operational whether phono (RCA) or Balanced XLR
input connection is made to the aPA7.5 Mono.
Gain Matching
All Cyrus power amplifiers, and all power amplifier stages in Cyrus integrated
amplifiers have the same voltage gain characteristics. This means that you
can use the aPA7.5 Mono in conjunction with any Cyrus amplifier for bi-
amping, etc. without any set-up adjustments being required.
MC-Bus System Connection (Optional)
Connecting the MC-Bus sockets h of the aPA7.5 Mono in an MC-Bus system
provides unified system power control. An MC-Bus loop is established by
connecting single phono cables from the MC-Bus output of one unit to the MC-
Bus input of another in a daisy-chain. Complete the loop by returning the MC-
Bus output of the final component to the MC-Bus input of the first (see
example system connections in Fig.3).
With MC-Bus established you can control the power function of the system
from the front panel or remote control of the main Cyrus amplifier or Surround
Processor.
Cyrus aPA7.5 Mono
2