Arcam Pre Amplifier P35 - Manual (Page 11)

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CONNECTING TO OTHER EQUIPMENT
The P35 and P1 amplifiers provide the following connections:
AUDIO IN (P35)
AUDIO IN and BALANCED AUDIO IN (P1)
Connect one of these inputs to the output sockets of your pre-
amplifier or the
PRE OUT sockets of an integrated amplifier. Please read
the notes on page 5, which give information on the type of connection
that should be used to connect your pre-amplifier and power amplifier
together.
MONO LINK (P35) – The P35 power amplifier can be adapted to
provide two mono loudspeaker outputs from a single input. Pull out
the link supplied and use it to connect the
L and R AUDIO OUT sockets
together. Using one power amplifier per loudspeaker will enable you
to bi-amplify bi-wireable loudspeakers. This is particularly beneficial
for top quality stereo installations with a separate pre-amplifier, or
where amplifiers are provided for the left, centre and right channel
loudspeakers in a five speaker Dolby Pro Logic or Dolby Digital
system.
If you wish to take advantage of this feature, please contact your Arcam
dealer for more information.
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 amplifier; if you select (for example) the XLR
connector, then you will not be able to hear signals connected to the
phono inputs.
AMPLIFIER GAIN SWITCH (P1) – This switch is to allow the gain
of the P1 amplifier to be changed to suit your system requirements.
Two settings are available: with the switch in the IN position the gain is
set to standard ARCAM gain of 31.5dB. This allows the P1 to be used
in systems where there are other ARCAM power amplifiers. When the
switch is set to
OUT then the gain is set to ‘THX standard gain’. In this
mode it can be used in systems containing amplifiers with THX gain (for
example, the P7).
DAISY CHAINING
Both the P35 and the P1 can also be connected to further power
amplifiers to drive more speakers (e.g., those in other rooms or tri-
amplified speakers, etc). This technique is called ‘
Daisy chaining’.
To daisy chain power amplifiers, connect the AUDIO OUT sockets on the
power amplifier to the input of the extra power amplifier – left to left
and right to right.
CONNECTING LOUDSPEAKERS
The red and black terminals on the back of the amplifiers are used to
make the connections to the loudspeakers. It is possible to connect two
pairs of speakers; the pair designated “speaker 1” (
SP1 ) are connected
to the lower set of terminals, while the pair designated “speaker 2” ( SP2 )
are connected to the upper set of terminals.
When connecting the speaker terminals of the amplifier with the
terminals on the speakers make sure that like polarities are matched
(i.e., match “
+” with “+” (usually red) and “–” with “–” (usually black)).
Mismatching of polarities will result in a weak central sound, unclear
orientation of the instruments and the sense of direction of the stereo
being impaired.
There are two options for connecting the speaker cable to the
amplifier:
USING BARE WIRE ENDED LEADS:
1. Strip back the insulation on the wire to reveal about 2cm of
conductor (the metal inside the cable).
2. If the conductor is stranded, twist the strands together tightly to
avoid loose strands making contact with the adjacent terminals
or the back panel.
3. Loosen the terminal by turning it anti-clockwise
4. Insert the twisted wire through the hole in the terminal.
5. Tighten by turning clockwise.
When making connections with stranded bare ended wires, take great
care that no individual strands of wire come into contact with the
adjacent terminals or with the back panel. If this should happen, it will
cause a short circuit on the output of the amplifier and could damage
the amplifier.
USING SPADE TERMINALS:
1. Loosen the terminal by turning it anti-clockwise
2. Insert the spade connecter under the terminal.
3. Tighten by turning clockwise.
REMOTE SWITCHING
By making a connection from the TRIG OUT socket of the C30 pre-
amplifier to the REMOTE IN socket of the P35/P1 power amplifier, you
can use the C30 to switch the power amplifier on and off. If configured
in this way, the front panel
POWER button of the C30 (or the POWER/
STANDBY button on the remote control) switches both amplifiers on
and off together. This facility allows you to conceal the power amplifier
yet still control it.
The connecting cable required is a 3.5mm to 3.5mm jack lead (stereo
or mono) and it is possible to connect several power amplifiers to C30
by ‘daisy chaining’ from
TRIG OUT of one P35/P1 into the REMOTE IN of
the next.
THREE CHANNEL OPTION (P35 ONLY)
The P35 power amplifier can be upgraded from stereo to three
channels by adding a “third channel module”. (If this is performed, the
model is called the P35/3.)
The module offers extra loudspeaker terminals together with a third
set of
AUDIO IN and OUT phono sockets and converts the P35 into
a 3 x 90W (RMS per channel into 8Ω) amplifier suitable for Home
Cinema or multi-channel audio use (such a unit may be used to amplify
left, right and centre channels in a multi-channel system, for example).
If you wish to take advantage of this feature, please contact your Arcam
dealer for more information.