Pre Amplier C31
Power Amplier P35
Power Amplier P1
C31/P35/P1
E-3
English
Safety guidelines
RISQUE DE CHOC ELECTRIQUE
NE PAS OUVRIR
ATTENTION
CAUTION
RISK OF ELECTRIC
SHOCK DO NOT OPEN
CAUTION: To reduce the risk of electric shock, do not remove cover (or back). No user serviceable parts inside. Refer servicing
to qualied service personnel.
WARNING: To reduce the risk of re or electric shock, do not expose this apparatus to rain or moisture.
The lightning ash with an arrowhead symbol within an equilateral triangle, is intended to alert the user to the presence of uninsulated
‘dangerous voltage’ within the product’s enclosure that may be of sufcient magnitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance
(servicing) instructions in the literature accompanying the product.
CAUTION: In Canada and the USA, to prevent electric shock, match the wide blade of the plug to the wide slot in the socket
and insert the plug fully into the socket.
Important safety instructions
These products are designed and manufactured to meet
strict quality and safety standards. However, you should
be aware of the following installation and operation
precautions:
1. Take heed of warnings and instructions
You should read all the safety and operating instructions
before operating these products. Retain this handbook for
future reference and adhere to all warnings in the handbook
or on the product itself.
2. Water and moisture
The presence of electricity near water can be dangerous. Do
not use these appliances near water – next to a bathtub,
washbowl, kitchen sink, in a wet basement or near a
swimming pool, etc.
3. Object or liquid entry
Take care that objects do not fall and liquids are not spilled
into the enclosure of a unit through any openings. Liquidlled objects such as vases should not be placed on these
products.
4. Ventilation
Do not place these units on a bed, sofa, rug or similar
soft surface, or in an enclosed bookcase or cabinet, since
ventilation may be impeded. We recommend a minimum
distance of 50mm (2 inches) around the sides and top of
the each unit to provide adequate ventilation.
5. Heat
Locate these products away from naked ames or heat
producing equipment such as radiators, stoves or other
appliances (including other ampliers) that produce heat.
6. Climate
These products have been designed for use in moderate
climates.
7. Racks and stands
Only use a rack or stand that is recommended for use with
audio equipment. If the equipment is on a portable rack it
should be moved with great care, to avoid overturning the
combination.
8. Cleaning
Unplug a unit from the mains power supply before cleaning.
The cases should normally only require a wipe with a soft,
damp, lint-free cloth. Do not use paint thinners or other
chemical solvents for cleaning.
We do not advise the use of furniture cleaning sprays or
polishes as they can cause indelible white marks if the unit
is subsequently wiped with a damp cloth.
9. Power sources
Only connect an unit to a power supply of the type
described in the operating instructions or as marked on the
product itself.
The primary method of isolating these products from the
mains supply is to remove the mains lead from the rear of
the unit. These products must be installed in manner that
makes this disconnection possible.
These are Class 1 devices and must be earthed.
10. Power-cord protection
Power-supply cords should be routed so that they are not
likely to be walked on or pinched by items placed upon or
against them. Pay particular attention to cords and plugs,
and the point where they exit from the unit.
11. Grounding
Ensure that the grounding means of these products is not
defeated.
12. Power lines
Locate any outdoor antenna/aerial away from power lines.
13. Non-use periods
When using the stand-by function, a small amount of
current will continue to ow into the unit. Unplug the power
cord of a unit from the outlet if it is to be left unused for a
long period of time.
14. Abnormal smell
If an abnormal smell or smoke is detected from a unit, turn
the power off immediately and unplug the unit from the
wall outlet. Contact your dealer for further advice.
15. Servicing
You should not attempt to service these products beyond
that described in this handbook. All other servicing should
be referred to qualied service personnel.
16. Damage requiring service
These products should be serviced by qualied service
personnel when:
A. the power-supply cord or the plug has been damaged,
or
B. objects have fallen, or liquid has spilled into the
appliance, or
C. the appliance has been exposed to rain, or
D. the appliance does not appear to operate normally or
exhibits a marked change in performance, or
E. the appliance has been dropped or the enclosure
damaged.
Safety compliance
These products have been designed to meet the IEC 60065
international electrical safety standard.
C31/P35/P1
E-2
Using this handbook
Thank you for buying this quality Arcam product.
This handbook covers the following items:
C31 pre-amplier;
<
P35 power amplier;
<
P1 power amplier.
<
This handbook is intended to give you all the information
you need to install and use these products. The C31 is
described rst, followed by the P35 and the P1. Use of
the CR-389 remote control supplied with the C31 is also
described.
If your ampliers have been installed and set-up by an
authorised Arcam dealer, you may wish to go directly to
the sections on how to use this equipment. Otherwise we
recommend reading carefully the installation instructions
for your products before proceeding.
Safety
Safety guidelines are set out on page 2 of this handbook.
Many of these items are common-sense precautions but,
for your own safety and to ensure that you do not damage
the unit, we recommend that you read them.
Contents
Safety guidelines................................................ E-2
Important safety instructions..........................E-2
Safety compliance.........................................E-2
Using this handbook ...........................................E-3
Safety .........................................................E-3
Installation: C31 pre-amplier..............................E-4
Positioning the unit .......................................E-4
Connecting to other equipment....................... E-4
Connecting to a power supply......................... E-5
Switching the C31 on ....................................E-6
Changing the volume ....................................E-6
Selecting an audio source ..............................E-6
Using your C31 pre-amplier ...............................E-6
Recording an audio source .............................E-7
Listening using headphones ...........................E-7
Product conguration ....................................E-7
Conguring your C31 pre-amplier .......................E-8
Introduction .................................................E-8
Adjusting listening settings ............................E-8
Using the remote control ..................................... E-9
Installation: P35 and P1 power ampliers ............E-10
Positioning your power amplier ...................E-10
Connecting to other equipment..................... E-10
Remote switching .......................................E-11
Connecting loudspeakers .............................E-12
Connecting to a power supply....................... E-13
Using your power amplier ................................ E-14
Technical specications ..................................... E-15
Remote-control codes ....................................... E-16
Troubleshooting ............................................... E-17
Guarantee ....................................................... E-17
On-line registration ..................................... E-17
English
Environmental matters:
This handbook is printed in the U.K. on recycled paper,
and is itself fully recyclable and biodegradeable.
The paper used is from the ‘Revive’ range of papers,
manufactured in the U.K. by Robert Horne. In Revive,
75% of the paper is de-inked post-consumer waste, with
the remaining 25% being mill broke and virgin bre.
The recycled pulps used in the production of this paper
are a combination of Totally Chlorine Free (TCF) giving
zero AOX and Elemental Chlorine Free (ECF) giving a
resultant AOX level of less than 0.5Kg per 1000Kg of
pulp.
C31/P35/P1
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C31/P35/P1
E-4
C31/P35/P1
E-5
Engl ish
Positioning the unit
<
Place your ampli er on a level, rm surface.
<
Avoid placing the unit in direct sunlight or near sources of heat or damp.
<
Ensure adequate ventilation. Do not place the unit in an enclosed space such as a bookcase or
cabinet as both of these will impede air- ow through the unit.
Connecting to other equipment
The connections on the rear of the C31 fall into four groups:
1. dedicated audio inputs;
2. recording loops;
3. connections for power-ampli ers;
4. remote control and trigger connections.
These groups are described below.
General advice on connecting to other equipment
<
We recommend the use of high-quality interconnect cables to and from your ampli er to ensure the
best sound quality; cheap ‘bell-wire’ interconnects may seem to be a good alternative, but they will
reduce the overall quality of your system, and are a false economy.
<
Make sure that audio and power cables are kept as far apart from each other as possible. This
reduces the risk of ‘noise’ from the power cables bleeding into those for audio.
<
Cables should be kept as short as is practical.
<
For each of the audio inputs/outputs that you wish to use, connect the terminal labelled L or
LEFT (on the device to be connected) to the terminal labelled L for that input/output on the C31.
Similarly, the terminal labelled R or RIGHT on the device should be connected to the R-terminal on
the C31.
Conventionally, stereo-phono leads have plugs that are coloured red for the right channel and white
or black for the left channel, to aid channel identi cation.
Audio inputs
bl
DVD – This input is intended for use with a DVD-player. Connect the stereo audio outputs of your
DVD player to these sockets.
bm
AV – This input is intended for use with general audio-visual equipment, such as a VCR,
digital TV/satellite receiver, or Nicam tuner. Connect the analogue audio outputs of the
device to this input.
bn
TUNER – Intended for use with a radio tuner.
bo
CD – Intended for use with a CD-player.
bp
AUX – As with the ‘AV’ input, this is intended for general use. Connect the audio outputs of
any unit with a line-level output (tape deck, tuner, etc.), to this input.
bq
PHONO (if tted) – As standard, no phono input is tted to the C31.
Phono inputs are provided on a separate plug-in module which your Arcam dealer or
distributor can supply and t. This module is compatible with most high-output moving-coil
and moving-magnet cartridges (MM) and low-output moving-coil cartridges (MC). Once the module
is tted, MM or MC is selected via the MM/MC back panel switch.
Why is this useful?
The phono module (or an external phono ampli er) is required if you wish to connect a record
player to the C31. This is because the low-voltage output of a record player requires a preampli cation stage before the signal can be used.
If you have already an external phono ampli er that you wish to use, connect this to one of the
line-level inputs, such as the ‘AV’ input.
Installation: C31 pre-ampli er
LR
PHONO
POWER INLET
PRE OUT
BUFFERED
L
R
L
R
L
R
VOLTAGE
SELECT
RECORD
OUT
PLAY
IN
TAPE/PROC
RECORD
OUT
PLAY
IN
VCR/TAPE 2 DVD AV TUNER CD AUX
MM
MC
REMOTE
IN
TRIG
OUT
115/230V
DIRECT
With the exception
of the ‘PHONO’ input,
although these inputs
are labelled for speci c
devices, all have the
same characteristics and
each may be used with
any line-level product.
Recording loops
The C31 is equipped with two recording loops, for use with recording devices (such as cassette decks,
MiniDisc players, VCR’s etc.)
TAPE/PROC RECORD OUT – Connect these output sockets to the input sockets of your recording
7
device (usually labelled RECORD or IN).
TAPE/PROC PLAY IN – Connect the output sockets of your recording device (usually labelled PLAY
8
or OUT) to these inputs.
If you do not have a recording device, you can use this input for other (line-level) equipment, such
as a CD-player, tuner, VCR, etc.
VCR/TAPE2 RECORD OUT – These output sockets can be connected to the input sockets of a
9
second recording device.
VCR/TAPE2 PLAY IN – Connect the output sockets of your second recording device to these
bk
inputs. Alternatively, this input may be used for other (line-level) equipment such as a CD-player,
tuner, etc.
Power-amplier connections
PRE OUT – The recommended connection between the C31 pre-amplier and your power
456
amplier depends on both the distance between the two and the type of power amplier that you are
using. There are three options:
1. If the cables to be used to connect the C31 to the power amplier are less than 3m long, we
recommend connecting the DIRECT sockets 6 to the input sockets of your power amplier. On the
P35 and P1, connect to the socket(s) labelled AUDIO IN.
If the cables to be used to connect the C31 to the power amplier are 3m or longer, then the connection
to use depends on the type of power amplier you have.
2. If your power amplier does not have balanced inputs (such as the P35), use the
BUFFERED outputs
3. If your power amplier provides balanced inputs (such as the P1), use the balanced outputs 4. On
the P1, connect to the sockets labelled BALANCED AUDIO IN.
The buffered and balanced outputs are designed to drive longer cables than the direct output, but you
cannot damage either your C31 or your power amp. by using the “wrong” connection type.
. On the P35, connect to the sockets labelled AUDIO IN.
5
Engl ish
Other connections
Phono earth terminal – For connecting your turntable earth lead (if required). Note that this terminal
must not be used as a safety earth.
TRIG OUT and REMOTE IN (12V in and out) – These connections are intended for use in multi-
3
room installations.
TRIG OUT: This output provides a 12V signal whenever the unit is switched on (i.e.,
<
not off or in stand-by). This signal can be used to switch on power ampliers (or other
equipment) connected to the C31, as they will come on when the C31 is activated. This is
useful if the power amplier is remote from the C31, or otherwise difcult to access.
REMOTE IN: This allows remote-control signals to be received by the C31 if the remote
<
sensor is covered (or otherwise not ‘visible’ to the remote-control). An external sensor
(such as the Xantech ‘Dinky Link’™) is used to receive the signals from the remote-control,
which are then fed to the C31 (into this input) using a suitable cable.
In normal use there is no need to make any connections to either of these sockets.
Connecting to a power supply
Mains lead
The appliance is normally supplied with a moulded mains plug already tted to the lead. Check
that the plug ts your supply and that your mains supply voltage agrees with the voltage
setting (115V or 230V) indicated on the rear panel of the unit 2 before plugging in.
If your mains supply voltage or mains plug is different, please consult your Arcam dealer
immediately.
Plugging in
Push the IEC-plug of the power cable into the socket POWER INLET 1 in the back of the unit,
making sure it is pushed in rmly.
Stand-by power
For remote stand-by operation, the amplier’s control power-supply is kept powered up all the time the
unit is connected to the mains supply. The front-panel power-switch powers all other circuitry down and
power consumption in this mode is less than 2W.
This means that even though the power-switch is off, it may be possible to hear a slight residual hum
coming from the mains transformer inside the amplier. This is perfectly normal. If the unit is to be left
unused for an extended period, however, we recommend that it is disconnected from the mains supply.
The 12V-trigger uses
a 3.5mm mono jack
plug, wired as follows:
Sleeve: Ground
<
Tip: Active
<
When the C31 is
powered-on, the tip
carries 12V, currentlimited to 30mA; otherwise the tip carries 0V.
The remote-in also uses
a 3.5mm mono jack
plug, wired as above.
Remote control signals
must be in modulated
RC5 format, with a
voltage level of 5–15V.
Note that the remote
receiver will require its
own power-supply.
Details of the
Xantech ‘Dinky Link’
can be found at
www.xantech.com, or
ask your dealer.
C31/P35/P1
E-5
C31/P35/P1
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C31/P35/P1
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Engl ish
Using your C31 pre-ampli er
Switching the C31 on
The power button bm switches the unit on and off; alternatively, the unit can be switched in and out of
stand-by mode by pressing the 2 button on the remote control handset.
The power light (next to the “C31 Pre-Ampli er” text) indicates the state of the ampli er:
1. a red light means that the ampli er is in stand-by mode;
2. when you switch your ampli er on, the power light glows amber for a few seconds; during this time
the outputs are muted;
3. the light changes to green when the ampli er is ready for use.
The power light may ash if a fault has occurred – the fault type is shown on the display. See page 16,
“Troubleshooting,” for help in resolving fault situations. If the fault cannot be cleared, unplug your
ampli er and contact your Arcam dealer.
Changing the volume
Use the control knob 7 in the centre of the display to change the volume. Turn the
knob clockwise to increase the volume, anti-clockwise to reduce it.
The output of the C31 can be muted by pressing MUTE 1. Press MUTE for a second
time (or change the volume) to release the muting.
Selecting an audio source
A source-selection button 8 is used to select the source that is connected to the
input corresponding to the button. A light above the relevant button indicates which
input is selected and this information will also be shown on the display.
TAPE
To listen to the device connected to the tape input, press the TAPE button.
Note that two source lights will be illuminated when the TAPE button is pressed: the
tape light itself, together with an indicator to show which source is being routed to
the tape outputs for recording purposes. To change this recording source, please
see below.
To de-select the tape input, press the TAPE button for a second time.
C31 PRE-AMPLIFIER
REF TRIM POWERPHONES
PHONO
CD TUNER AV DVD
VCR TAPE
ENTER
MUTE RECORD SELECT
BALANCE DISPLAY
AUX
It is important to realise that the
volume indication on the display
may not an accurate indication of
the ‘percentage’ of the ampli er
power in use. Your power ampli er
may deliver its full power long
before the volume control reaches
its maximum position, particularly
when listening to ‘loud’ inputs,
such as CD’s. In contrast, lowerlevel inputs, such as tuners and
cassette decks, will sound quieter
for the same shown volume level.
To compensate for this (to make
all inputs the same ‘loudness’ for
a given value on the display), the
input levels of each source may
be adjusted. This is done using
the product con guration menu,
described on page 8.
Recording an audio source
The C31 allows listening to and recording from the same source, or listening to one source whilst
recording another. The signal to be recorded is sent to both the TAPE and VCR output sockets.
Selecting the source for recording
The recording outputs can be congured in two ways:
1. to allow recording of the source being listened to;
2. to allow recording of a particular (specied) source, regardless of what is being listened to.
To record the source being listened to, press the RECORD button 2 repeatedly until the display
shows ‘Record source’. After a few seconds the display reverts to showing the volume level, and you are
ready to record.
In this conguration, selecting a different input changes the source that is routed to the recording
outputs.
To record one source whilst listening to another, press RECORD again until the display shows
‘Record’ followed by the name of an input (e.g., ‘Aux’, ‘CD’, ‘Tuner’, etc.). Now press the source-selector
button on the front-panel for the source you wish to record. Your selection is shown on the display for a
few seconds, after which the display reverts to showing the volume level. You are now ready to record.
Pressing a different source-selection button changes the source that you are listening to, but does not
alter the source that is routed to the recording outputs.
Tape-to-tape copying (dubbing)
You can perform tape dubbing from VCR to TAPE, but not from TAPE to VCR.
For example, to copy from a cassette recorder connected to the VCR socket to a cassette recorder
connected to the TAPE socket, rst use the RECORD button as explained above and select ‘Record VCR’.
This routes the VCR signal to the TAPE output.
Listening using headphones
The headphone socket bl accepts headphones with an impedance rating between 8Ω and 2kΩ,
tted with a 6.5mm stereo jack plug. The pre-amp. outputs are muted when headphones are
plugged in.
The headphone socket is always active, unless the volume has been muted.
Product conguration
The C31 has a conguration menu that allows various performance and behaviour aspects to be
altered. This menu is described in detail on the next page. Buttons have been provided on the
front-panel to allow direct access to the most important conguration menu items:
BALANCE - gives direct access to the “Balance” menu item.
4
DISPLAY - this changes the display brightness. There are three brightness levels to chose
5
from: ‘on’, ‘dimmed’ and ‘off’. If the C31 is switched off while the display is set to ‘off’, the
display will be set to ‘dimmed’ when the C31 is switched on again.
REF - this toggles the volume display mode between ‘Standard’, ‘Fine’, and ‘Reference’ (these are
9
described on the next page. When the ‘Reference’ volume display is selected, the light above the
Ref button is illuminated.
TRIM - gives direct access to the “Trim” menu item.
bk
Engl ish
Did you know: the
original 6.5mm (or
1/4”) head-phone jack,
dates from 1878 for use
in manual telephone
exchanges – making
it possibly the oldest
electrical connector
standard on earth.
Source: en.wikipedia.org
C31/P35/P1
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C31/P35/P1
E-8
C31/P35/P1
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Engl ish
Con guring your C31 pre-ampli er
Introduction
The C31 allows you to customise various features of the ampli er to t your system. Use this diagram
to help you navigate through the available con guration options.
In the diagram below, the ENTER and SELECT buttons from the front panel are represented by the
symbols and respectively.
The control knob is shown as .
Adjusting listening settings
Normally, the display shows the current volume and the control knob is used
to adjust this.
Press SELECT once to enter the con guration menu, then press it repeatedly
to cycle through the menu items. When you have found the setting that you
wish to adjust (the setting is shown on the display), it can be adjusted by
using the control knob. Press ENTER to store the change you have made and
return to default (volume) mode, or press SELECT again to move to the next
setting.
Note that the menu will time-out after a short period of inactivity, with the
display reverting to the current volume.
The following items are available for adjustment:
Volume Resolution – There are three volume-display options to chose from:
‘Standard’, ‘Fine’ or ‘Reference’. Standard and Fine represent different
levels of volume-control sensitivity; the Reference setting gives absolute
increments in 0.5dB steps.
Input Trims – Input trims are used to compensate for variations in
output levels of different source equipment. If, for example, your CD
player is louder at a given volume display value than other inputs, you
can attenuate it by using this setting so that it matches your other
components.
Use the source-select buttons to select the input you wish to adjust, then
the control knob to set (increase or decrease) the input volume for that
source.
Max. ‘On’ Volume – This can be used to limit the maximum volume the
ampli er operates at when it is rst switched on: the C31 comes on at
the (reduced) “Max. On Volume” level if the last-used volume exceeds
this value.
If this item is set to ‘Disabled’, the C31 always comes on at the last used
volume, even if this is very loud.
Processor Mode – Processor mode enables you to x the gain (volume
setting) of your C31. The C31 (in combination with a power amp.) can
then be used to drive the front left and right speakers of a surroundsound system, when fed from a separate processor. The volume of the
entire system can then be controlled using the processor.
Feed the sound from the processor into the TAPE input, then set the gain
of the C31 to match the ampli ers that drive your other loudspeakers.
Reset – this restores all ampli er settings to their factory defaults.
C31/P35/P1
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Engl ish
Using the remote control
NOTE: Remember to install the two AAA batteries
supplied before trying to use your remote control.
Do not place anything in front of the FMJ badge on
the top left of the C31 (where the IR receiver is
located), or the remote control may not work.
CR-389 Remote Control
The CR-389 remote control gives access to all functions
available on the front panel of the C31. It also has
controls to operate Arcam CD players and tuners.
FM DAB
PROG DISP
RPT
MODE BAND
1-9 2-10 3-11
FM
DAB
SEL
TUNER
CR-389
CD
AMPLIFIER
VCRDVD TAPEAV
TUNERCDAUXPHONO
ENTER
SP1
SP2
DISP
MENU DISP
4-12
5-13 6-14 7-15 8-16
* +
(UP and DOWN)
These buttons are used in the con guration menu
and have the same effect as turning the control
knob. Pressing * is the same as turning the
control knob clockwise, + is the same as turning
the knob anticlockwise.
SEL (Select)
Performs same function as the SELECT button on
the front panel. It allows you to use the remote’s
volume switch in the same way you use the
control dial on the front panel – to adjust various
ampli er settings (see page 8).
Pressing + corresponds to turning the control knob
clockwise, – to anticlockwise.
Source selection buttons
These operate in the same way as the source
selectors on the front panel of your C31.
Power/Stand-by
Toggles the C31 between stand-by mode and full
power mode. The power indicator light on the front
panel is red if the C31 is in stand-by, amber while
it is powering-up (this takes only a few seconds)
and green when the C31 is operational.
SP1 and SP2
These buttons are for use with the P35 ampli er,
to allow you to select and deselect the main (SP1)
and secondary (SP2) sets of speakers attached to
it (see page 14 for further information).
DISP (display)
Cycles through the settings ‘Off’, ‘Dimmed’ and
‘Bright’. Turning the display ‘Off’ may give a slight
improvement in sound quality.
Volume and - (mute)
Press + to increase volume or – to decrease the
output volume of the ampli er.
Press - to mute the pre-amp outputs of the
C31. Note that both recording outputs will remain
active. Mute is disabled by either pressing again, or adjusting the volume.
CD controls
These offer basic control of Arcam CD players.
If you wish to use the same
remote control for both your C31
and your DT91 tuner, please use
the CR-389D remote control shipped
with the tuner (instead of the
remote control described here).
TUNER
These buttons are used to control Arcam tuner
functions.
Note that the FM/DAB lights indicate into which
mode you are switching the remote control. The
lights only illuminate for ve seconds to conserve
battery power.
If neither light is illuminated this does not mean
that the remote control is not working.
ENTER
Performs the same function as the ENTER button
on the front panel (see page 8).
C31/P35/P1
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C31/P35/P1
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Engl ish
Installation: P35 and P1 power ampli ers
Positioning your power ampli er
<
Place your ampli er on a rm, level surface.
<
Avoid placing the unit in direct sunlight or near sources of heat or damp.
<
Ensure adequate ventilation. Do not place the your ampli er in an enclosed space, such as a
bookcase or cabinet, as both of these will impede air- ow through the unit (which is necessary for
cooling).
In most situations, there are two choices for getting signals from the P35 to the speakers: the P35 can
be situated remotely from the speakers and longer speaker cables used, or the P35 can be situated
locally to the speakers by using longer line-level cables (from the pre-ampli er). Over long distances
(5m+), the sound quality will generally be better using the low-current line-level (pre-ampli er) cabling
than high-current speaker (post-amplifer) cabling, due to otherwise high losses in the speaker cabling.
Connecting to other equipment
The P35 and P1 ampli ers provide the following connections:
AUDIO IN (P35)
AUDIO IN and BALANCED AUDIO IN (P1)
Connect the output sockets of your pre-amp. (or the PRE OUT sockets of an integrated ampli er) to one
of these inputs. Please read the information on page 5 “Power-ampli er connections”, which details the
type of connection that should be used.
Mono Link (P35)
The P35 can be adapted to provide two mono loudspeaker outputs from a single input. Pull out
the link supplied on the back panel (labelled ‘link’) and use it to connect the L and R AUDIO OUT
sockets together. Using one power ampli er per loudspeaker will enable you to bi-amplify bi-wireable
loudspeakers (as described on the following page).
Follow the instructions given below for bi-wiring, using the SP2 connections of the P35 for the highfrequency speaker and the SP1 connections for the low-frequencies. See also the section on “Remote
switching”.
Input Selector Switch (P1)
This switch allows either unbalanced signals (through the phono connector) or balanced signals
(through the XLR connector) to be selected. The switch should be pressed-in to select the phono inputs
and out to select the XLR connector. Note that only one type of input connector will be switched to the
input of the ampli er; if you select (for example) the XLR connector, then you will not be able to hear
signals connected to the phono inputs.
+ R/CH1 –
SP1
SP2
POWER INLET
OUTIN
L
R
VOLTAGE
SELECT
230V
4 – 16 OHMS
+ L/CH2 –
+ R/CH1 –
+ L/CH2 –
AUDIO
LINK
REMOTE
IN
TRIG
OUT
POWER INLET
OUT
VOLTAGE
SELECT
230V
GAIN
XLR/
PHONO
TRIG
OUT
REMOTE
IN
4 – 16 OHMS
–
+
SPEAKERS
–
+
AUDIO
IN
P1
ARCAM
XLR
PHONO
BALANCED AUDIO
OUT
IN
The mono link fitted
Amplier Gain Switch (P1)
This switch is to allow the gain of the P1 amplier to be changed to suit your system requirements.
With the switch in, the gain is set to standard ARCAM gain of 31.5dB. This is the normal setting,
which allows the P1 to be used in systems where there are other ARCAM power ampliers (excluding
the Arcam P7).
With the switch out, the gain is set to ‘THX standard gain’. Use this setting if your P1 is to be used in
systems containing ampliers with THX gain (for example, the Arcam P7).
Daisy chaining
Both the P35 and the P1 can be connected to further power ampliers to drive more speakers (e.g.,
those in other rooms, tri-amplied speakers, etc). This technique is called ‘Daisy chaining’.
Connect the AUDIO OUT sockets on the P35/P1 to the pre-amp. input of the next amplier in series, left
to left, right to right.
Remote switching
By making a connection from the TRIG OUT socket of the C31 pre-amp. to the REMOTE IN socket of
your P35/P1, you can use the C31 to switch the power amplier on and off. If congured in this way,
the front panel POWER button of the C31 (or the POWER button on the remote control) switches both
ampliers on and off together. This facility allows you to position your power amplier in a remote
location (such as close to the speaker it is amplifying), yet still control it.
The connecting cable to use is a 3.5mm jack lead, wired as given on page 5. It is possible to connect
several power ampliers to a C31 by ‘daisy chaining’ from the TRIG OUT of one power amplier into the
REMOTE IN of the next.
Engl ish
C31/P35/P1
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C31/P35/P1
E-12
C31/P35/P1
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Engl ish
Connecting loudspeakers
Wiring strategies
There are three different wiring strategies that can be employed to connect your ampli er to your
speakers. The choice will be limited by what your speakers can support.
<
Single wiring
Single wiring is the conventional wiring method of running a single cable per channel between the
ampli er and the speaker. This is the easiest technique.
<
Bi-wiring
Bi-wiring is running two separate cables between the ampli er and each speaker, with one cable
carrying the low-frequency information, the other the higher-frequency signals. The P35 and P1
are designed to allow easy bi-wiring, but speakers support it only if separate connection terminals
are provided for the two cables (the speaker will have two pairs of terminals on the back, one pair
labelled ‘HF’ or ‘High Frequency’, the other pair labelled ‘LF’ or ‘Low Frequency’).
Why is this useful?
Bi-wiring improves the sound of your system because the separation of high- and low-frequency
signal currents into separate speaker cables avoids distortions caused by the different currents
interacting with one-another within a single cable, as occurs in single-wired systems.
<
Bi-amping
Bi-amping is the separation of the ampli cation of low- and high-frequency signals over two
ampli ers. You will require two ampli ers to do this.
Why is this useful?
The performance of your system is enhanced over bi-wiring by extending the signal separation
principle to use separate ampli cation for the low and high frequency drivers in each speaker.
Single wiring
Both the P35 and the P1 are designed for bi-wiring, which
is why there are duplicate speaker terminals on the back.
Both amps are quite happy with single-wiring, however; we
recommend that you use the lower sets of speaker terminals
(labelled ‘SP1’ on the P35) in this case. Similarly, if your
speaker has more than one pair of connecting terminals, use
the terminals labelled ‘LF’ or ‘Low Frequency’ on the speaker.
For the P35, connect the positive terminal of the right
speaker connection on the ampli er (coloured red and
labelled ‘+R’) to the positive terminal of your right speaker.
Similarly, connect the negative terminal of the ampli er
(coloured black and labelled with ‘R–’) to the negative
terminal of your speaker. Repeat the process for the left
speaker, using the ampli er terminals labelled ‘+ L –’.
For the P1, connect the positive speaker terminal (coloured
red and labelled ‘+’) to the positive terminal of the speaker to be driven. Similarly, connect the negative
terminal of the ampli er (coloured black and labelled ‘–’) to the negative terminal of the same speaker.
Repeat the process for your other P1 and speaker.
If your speakers support bi-wiring, then there is a strip of metal on the speakers connecting the lowfrequency terminals to those for the higher-frequencies; this must not be removed in a single-wired
system.
Bi-wiring
Bi-wiring is performed in the same way as single
wiring except that, for each speaker, a pair of cables
are used to connect the ampli er to each speaker.
Follow the instructions given for single wiring; then
perform the same actions, this time connecting the
second set of speaker terminals (labelled “SP2” on
the P35) to the speaker terminals labelled ‘HF’ or
‘High Frequency’. Please refer to the illustration.
Speakers that support bi-wiring have a strip of
metal on the speakers connecting the low-frequency
terminals to those for the higher-frequencies; this
must be removed in a bi-wired system.
A P35 connected to speakers using bi-wiring.
A P35 connected to speakers using single wiring.
C31/P35/P1
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Engl ish
Bi-amping
Bi-amping requires the use of a two ampli ers per
channel: either two P35’s or four P1’s in a stereo
system. One P35 (or two P1’s) is/are used to drive
the high-frequency (treble) speakers, the other is
used for the lower (bass) frequencies.
For the P35’s, connect one P35 to the speakers
as described for single wiring, with the exception
that the P35 should be connected to the speaker
terminals labelled ‘HF’ or ‘High Frequency’. Then (in
the same way), connect the second P35 to the lowfrequency terminals. Please refer to the illustration.
For the P1’s: four P1 ampli ers are required for
bi-amping two speakers. Two of the P1’s are used
to drive high-frequency (treble) and two are used
for the lower (bass) frequencies. Decide which
ampli er is to drive which speaker element, then
connect the ampli er to the speaker following the
instructions given for single wiring.
Note that the strip of metal on the speakers
connecting the lower terminals to the upper
terminals must be removed. Failure to do so will
result in damage to both ampli ers, which will not
normally be covered under warranty.
Notes on making speaker connections
<
Do not make any connections to any ampli er while it is switched on. We recommend that your
ampli er is completely disconnected from the mains supply before starting.
<
Before switching your ampli er(s) on for the rst time after connecting to speakers, please check
all connections thoroughly. Ensure that bare wires or cables are not touching each other or the
ampli er’s chassis (which could cause short circuits), and that you have connected positive (+) to
positive and negative (–) to negative. Be sure to check the wiring for both the ampli er and the
speaker.
<
After making connections: switch the ampli er(s) on, select a source signal, then gradually increase
the volume to the required listening level.
<
If you are unsure as to how your system should be connected, or need advice on bi-wiring or bi-
amping, please contact your Arcam dealer who will be happy to help you.
Connecting to a power supply
Mains lead
Your ampli er is normally supplied with a moulded mains plug already tted to the lead. Check that the
plug ts your supply and that your mains supply voltage agrees with the voltage setting (115V or 230V)
indicated on the rear panel of the unit before plugging in.
If your mains supply voltage or mains plug is different, please consult your Arcam dealer immediately.
Plugging in
Push the IEC-plug of the power cable into the socket POWER INLET on the back of the unit, making sure
it is pushed in rmly.
Stand-by power
For remote stand-by operation, the ampli er’s control power supply is kept powered-up all the time the
unit is connected to the mains supply. The front-panel power-switch powers down all other circuitry and
power consumption in this mode is less than 2W.
This means that even though the power switch is off, it may be possible to hear a slight residual hum
coming from the mains transformer inside the ampli er. This is perfectly normal. If the unit is to be left
unused for an extended period, however, we recommend that it is disconnected from the mains supply.
A P35 connected to speakers using bi-amping.
C31/P35/P1
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C31/P35/P1
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Engl ish
Using your power ampli er
P35 POWER AMPLIFIER
SP1 SP2 POWER
P1 POWER AMPLIFIER
POWER
POWER button
Switches the unit on and off. The light indicates the status of the ampli er.
When you switch your ampli er on, the light glows amber for a few seconds, during which time the
speakers are disconnected. The light changes to green when the ampli er is ready for use. A red light
means the ampli er is in stand-by mode.
The power light may ash if a fault has occurred, with the colour of the ashing light indicating the
nature of the fault:
<
green – a D.C. offset fault has occured (see info. box);
<
amber – a thermal fault has occured (the ampli er is too hot). Ensure that your
ampli er has adequate ventillation;
<
red – a short-circuit fault has occured. This can happen if the speaker cables
are not connected correctly and are making contact with each other or with the
chassis;
<
red and amber – more than one fault has occured.
Except for a thermal fault, if one of the above faults is detected by your ampli er
the unit waits for six seconds before checking to see if the fault has cleared. If
the fault clears within six seconds, the unit continues operation; otherwise the
unit shuts itself down. In the case of a thermal fault, the unit waits until its sensor
temperature lowers before resuming operation.
If the ampli er has shut itself down, you should unplug the ampli er and leave it
for a few minutes before reconnecting. If the fault cannot be cleared in this way,
unplug your ampli er and contact your Arcam dealer.
SP1 and SP2 (P35 only)
These buttons allow you to select and deselect the main (SP1) and secondary (SP2)
sets of speakers attached to your ampli er. An indicator light shows which set of
speakers are currently selected.
Note that if both lights are out then the ampli er will appear not to work, as all speakers are switched
off.
A “DC offset fault” is not an
ampli er fault, but a speaker
protection mechanism. If the
ampli er is supplied with a DC
voltage (rather than the expected
AC voltage) for an extended length
of time, the coils in the attached
speakers will eventually burn out
(or, in extreme cases, catch re).
Your Arcam ampli er can detect this
condition, and cut the current to the
speakers.
DC offset faults can occur
intermittently in all set-ups,
particularly if a tuner or satellite
receiver is connected. If it occurs
frequently or predictably, please
contact your dealer for advice.
Technical specications
C31 P35 P1
Continuous power output (20Hz—20kHz at 0.5% THD), per channel
Both channels, 8Ω, 20Hz—20kHz 100W
Single channel, 8Ω, 20Hz—20kHz 150W 170W
Both channels, 4Ω, 20Hz—20kHz 140W
Single channel, 4Ω, at 1kHz 200W 250W
Three channels, 8Ω, 20Hz—20kHz 90W
Harmonic distortion, 80% power, 8Ω at 1kHz 0.005% 0.003%
Inputs
Phono cartridge:
Input sensitivity 2.7mV (MM); 270µV
(MC)
Input impedance 47kΩ (MM); 300Ω
(MC)
Signal/noise ratio (CCIR) –79dB (MM); –73dB
(MC)
Overload margin 35dB
Line and tape inputs:
Nominal sensitivity 250mV—2V 800mV
Input impedance 22kΩ 22kΩ
Signal/noise ratio (CCIR) –113dB –110dB
Power amplier input
Nominal sensitivity 800mV 906mV (Arcam gain)
Input impedance 22kΩ 22kΩ
Gain 31.5dB 31.5dB (Arcam gain)
Preamplier output
Nominal output level 700mV
Maximum output level 8V RMS
Output impedance <50Ω
Headphone output
Maximum output level into 600Ω 5V
Output impedance 4.7Ω
General
Mains voltage 115V or 230V 115V or 230V 115V or 230V
Power consumption (maximum) 30VA 800VA (950VA for
Power consumption (standby) 2VA 2VA 2VA
Dimensions W x D x H (including feet) 430 x 370 x 110mm 430 x 350 x 110mm 430 x 350 x 110mm
Weight (net) 9.3kg 9.5kg (10.5kg for
Weight (packed) 11.5kg 12.5kg (13.5kg for
Supplied accessories mains lead
CR-389 remote control
2 x AAA batteries
E&OE
Engl ish
800VA
P35/3)
12.5kg
P35/3)
15.5kg
P35/3)
mains lead mains lead
NOTE: All specication values are typical unless otherwise stated.
Continual improvement policy
Arcam has a policy of continual improvement for its products. This means that designs and
specications are subject to change without notice.
C31/P35/P1
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C31/P35/P1
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Engl ish
Remote-control codes
The following tables give the IR-commands accepted by the C31.
Power commands Menu navigation commands
Command Decimal Code Command Decimal Code
Power toggle 16–12
Power-on 16–123
Power-off 16–124
Source selection commands
Command Decimal Code Display control commands
PHONO select 16–1
AV select 16–2 Display 16–59
TUNER select 16–3
DVD select 16–4 Volume control commands
TAPE select 16–5
VCR select 16–6 Mute 16–13
CD select 16–7 Volume up 16–16
AUX select 16–8 Volume down 16–17
The following tables give commands accepted by the P35.
Power commands Speaker control commands
Command Decimal Code Command Decimal Code
Power toggle 16–12 Speaker 1 toggle 16–35
Power-on 16–123 Speaker 2 toggle 16–39
Power-off 16–124 Speaker 1 on 16–43
UP
DOWN
SELECT
ENTER
Command Decimal Code
Command Decimal Code
Speaker 1 off 16–44
Speaker 2 on 16–45
Speaker 2 off 16–46
16–32
16–33
16–37
16–87
The following table gives commands accepted by the P1.
Power commands
Command Decimal Code
Power toggle 16–12
Power-on 16–123
Power-off 16–124
Note that the C31 also responds to code 20–53 (the PLAY command for an Arcam CD player). The C31
swiches automatically to CD input on receiving this command.
C31/P35/P1
E-16
Troubleshooting
If you are having trouble with your amplier, check the following items.
No sound
Check the following:
Both the pre- and power-ampliers are switched on.
<
The pre-amp. is not muted (indicated on the C31 by “Muted” being shown on the front-panel).
<
The selected source is generating audio (e.g., if CD is selected, then the CD is playing).
<
The tape input is not selected on the C31 (indicated by the light above the TAPE button being
<
illuminated), instead of the expected source. In this case, press TAPE again to de-select the tape
input.
The speaker outputs are enabled on the P35, as indicated by the lights above the SP1 and/or SP2
<
buttons (as appropriate) being illuminated.
Sound cuts-out unexpectedly
If the temperature of the internal heatsink rises above a safe level, then a thermal cut-out inside
the amplier will operate. During this time, the power indicator on the front panel ashes and the
protection system temporarily removes the power to the speakers. The system will reset itself as the
heatsink cools down.
With two pairs of low-impedance speakers connected (6Ω or less), overloads are more likely.
<
Overloading the amplier may cause it to shut down because of overheating.
Note that, due to the high output voltage from a CD player, it is possible to drive your amplier at
<
full power even though the volume is not set at maximum. See page 6.
Amplier does not switch back on
All the ampliers detailed in this handbook have a protection mechanism which is activated if you
switch the unit on immediately after turning it off. If this mechanism activates, wait 30 seconds then try
again to switch the unit on.
Engl ish
Guarantee
Worldwide Guarantee
This entitles you to have the unit repaired free of charge, during the rst two years after purchase, at
any authorised Arcam distributor provided that it was originally purchased from an authorised Arcam
dealer or distributor. This period can be extended to ve years if the completed registration card is
returned to Arcam. Arcam can take no responsibility for defects arising from accident, misuse, abuse,
wear and tear, neglect or through unauthorised adjustment and/or repair, neither can they accept
responsibility for damage or loss occurring during transit to or from the person claiming under the
guarantee.
The warranty covers parts and labour costs for two years from the purchase date (ve years upon
registration). After this time you must pay for both parts and labour costs. The warranty does not
cover transportation costs at any time.
Claims under guarantee
This equipment should be packed in the original packing and returned to the dealer from whom it was
purchased, or failing this, directly to the Arcam distributor in the country of residence. It should be
sent carriage prepaid by a reputable carrier – not by post. No responsibility can be accepted for the
unit whilst in transit to the dealer or distributor and customers are therefore advised to insure the unit
against loss or damage whilst in transit.
For further details contact Arcam at:
Arcam Customer Support Department,
Pembroke Avenue, Waterbeach, CAMBRIDGE, CB5 9QR, England.
Problems?
Always contact your dealer in the rst instance.
If your dealer is unable to answer any query regarding this or any other Arcam product please contact
Arcam Customer Support at the above address and we will do our best to help you.
On-line registration
You can register your Arcam product on-line at: www.arcam.co.uk.
C31/P35/P1
E-17
PEMBROKE AVENUE, WATERBEACH, CAMBRIDGE CB5 9QR, EN GL AN D
www.arcam.co.uk
Issue 1 SH163
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