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For remote standby operation, the amplifier’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.
Power consumption in this mode is less than 2.5W.
This means that even though the power switch is off, it may be possible to hear a slight hum coming
from the mains transformer inside the amplifier. This is perfectly normal. If the unit is to be left unused
for an extended period, we recommend that it is disconnected from the mains supply by switching it off
at the wall socket, or by disconnecting the power lead.
Connecting to other equipment
The use of high quality interconnect cables to and from your amplifier is recommended to ensure the
best sound quality. Sockets marked L (and R) on your amplifier should only be connected to sockets
marked L (and R) on other equipment. All the line inputs have the same sensitivity and may be used
with equipment other than that labelled, if needed.
– Connect this output to the audio inputs of any unit with a line-level input, e.g., tape
– Connect these output sockets to the input sockets of your cassette deck
(usually labelled RECORD).
– Connect these input sockets to the output sockets of your cassette deck
(usually labelled PLAY). If you do not have a cassette deck you can use this input for other (line level)
equipment, such as a CD player, tuner, VCR, etc., but not a turntable.
– Connect this input to the audio outputs of a DVD player.
– Connect this input to the audio outputs of audiovisual equipment such as a VCR, laserdisc
player, satellite or Nicam tuner.
– Connect this input to the audio outputs of your radio tuner.
– Connect this input to the audio outputs of your CD player or DAC (digital to analogue
– Connect this input to the audio outputs of any unit with a line level output, e.g. tape deck,
– Connect this input to the output of your record player. This input provides RIAA
equalization and is compatible with most high output moving magnet (MM) cartridges.
Phono earth terminal – For connecting your turntable earth lead (if fitted). Note that this terminal
must not be used as a safety earth.
TRIG OUT and REMOTE IN
(12V in and out) – Each socket accepts a 3.5mm Mono Jack, with
Tip=signal, Sleeve=ground. The connections are intended for use in multi-room installations.
TRIG OUT – This output provides a 12V signal whenever the unit is switched on (i.e., not off or
in standby). This signal can be used to switch on automatically power amplifiers (or other
equipment) connected to the A70, as they will come on when the A70 is activated. This is useful if
the power amplifier is remote from the A70, or otherwise difficult to access. If you are bi-amping
with a power amplifier and wish to power both units on or off simultaneously, see page 10.
REMOTE IN – This allows remote control signals to be received by the A70 if the remote sensor is
covered (or otherwise not ‘visible’ to the remote control). An external sensor is used to receive
the signals from the remote control, which are then fed to the A70 (into this input) using a
suitable cable. Remote control signals acceptable to the A70 must be in modulated RC5 format,
with a voltage level of between 5V and 15V.
Note that in normal use there is no need to make any connections to these sockets. If you would like to
make use of these features, please contact your dealer for more advice on how to make the connections
and on what type of cable to use.
Pre/power amplifier connections
If you wish to use your A70 as a power amplifier, please consult your Arcam dealer.
– To use your amplifier as a pre-amplifier, connect the PRE OUT sockets to the input
sockets of your power amplifier. With a power amplifier of the correct gain (e.g. an Arcam P90 power
amplifier) you can bi-amplify (‘bi-amp’) suitable loudspeakers, giving significant improvements in sound
quality (see page 10).
The different output types
The distinction between PRE OUT, LINE OUT and RECORD OUT output types is subtle but important.
PRE OUT: This is the output that should be connected to your power amplifier. The output level varies
with the volume control.
LINE OUT: This output is taken before the volume control, i.e., the source being listened to is routed
directly to this output. If you wish, this output may be connected to a recording device, such
as a cassette recorder. Under no circumstances should this output be connected to a power
RECORD OUT: The output from the RECORD OUT connectors is dependent on the configuation of
the amplifier. Full instructions for this output are given on page 7; briefly, if the amplifier
is configured to ‘REC SOURCE’, then this output will carry the same signal as the LINE OUT
connection. If the amplifier is configured so that you are recording a different source than the
one you are listening to, then the RECORD OUT connections will carry the source being recorded.
3.5mm Mono Jack