Arcam Amplifer A70 - Manual (Page 10)

A70
E-10
Before you start
WARNING: Do not make any connections to your
amplifier while it is switched on or connected to the
mains supply.
Before switching on please check all connections
thoroughly, making sure bare wires or cables are not
touching the amplifier chassis (which could cause short
circuits) and you have connected positive (+) to positive
and negative (–) to negative.
Always ensure that the volume control on your amplifier
is set to minimum before starting these procedures.
Bi-wiring your loudspeakers
Bi-wiring improves the sound of your system because it
divides the high and low frequency signal currents into
separate speaker cables. This avoids signal distortions
arising from the high and low frequency currents interacting
with one another within a single cable, as in conventionally
wired systems.
You will need:
Speakers – with four input terminals each: these will be
marked
HF (High Frequency) and LF (Low Frequency).
Loudspeaker cables – two pairs of cables per loudspeaker
(which may be joined at the amplifier end if your amplifier
has only one pair of output terminals per channel), or a
suitably terminated cable set (a loom, probably prepared by
your dealer and capable of being used for bi-amping in one
length).
How to bi-wire loudspeakers
1. Remove the terminal links on the rear of your
loudspeakers
WARNING: This step is essential or damage to
your amplifier may result which is not covered
under warranty.
2. Connect the cables as shown in the diagram below,
ensuring correct polarity at all times.
Bi-amping your system
The performance of your system can be further enhanced
over that achieved with bi-wiring, by extending the principle
one stage further to include separate amplification for the
low and high frequency drive units in each loudspeaker
enclosure.
Connect the integrated amplifier to the high frequency
(
HF ) terminals and connect the power amplifier to the low
frequency ( LF ) terminals.
You will need:
Speakers – with four input terminals each (as with bi-
wiring): these will be marked
HF (High Frequency) and LF
(Low Frequency).
Two amplifiers – one of these would be the A70 and the
other an Arcam power amplifier (e.g. P90).
Loudspeaker cables – two pairs of cables per loudspeaker
or a suitably terminated cable set (a loom, probably
prepared by your dealer and capable of being used for bi-
amping in one length).
Interconnect cables – one pair of high quality
interconnect cables.
How to set up a bi-amped system
1. Remove the terminal links on the rear of your
loudspeakers.
WARNING: This step is essential or damage to
your amplifier may result which is not covered
under warranty.
2. Connect the cables as shown in the diagram below,
ensuring correct polarity at all times.
3. Use the interconnect cables to connect the PRE OUT
sockets of the A70 to the corresponding AUDIO IN
sockets of the power amplifier.
Bi-wiring and bi-amping loudspeakers
Bi-wiring using one set of connections on amplifier Recommended bi-amping configuration
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