Arcam Delta 110 User Manual

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Delta 110 digital pre-amplifier

Introduction

amplifier, the Delta 120, have been designed to meet the requirements of
the most demanding listener Combining excellent sound quality with
modern but restrained styling, the Delta 110 and 120 will provide the
heart of any high quality sound system.

inputs. These accept signals from a turntable, tuner two tape inputs and
an AV component, such as a stereo VCR or the Arcam Delta 150 Nicam
stereo TV tuner

signal directly from the digital output of a compact disc player, such as
the Arcam Delta 170 transport, or DAT player

and 'record'functions, allowing the user to listen to one programme at
the same time as recording another from an entirely separate source.

110 is provided with an infra red remote control handset, which

operates the input selection, mono, mute and volume controls.

best results from your pre and power amplifiers. Remember your dealer is

there to help you. He has full technical and service information for all
Arcam products and considerable experience of their use in a variety of
systems. If, however, he is uhable to answer your query, then do not
hesitate to contact us here directly.

The Arcam Delta 110 pre-amplifier and its matching power

The Delta 110 pre-amplifier has five switchable analogue

The Delta 110 also has two digital inputs which accept the

The switching system of the Delta 110 offers separate 'listen'

To increase further its versatility and ease of use, the Delta

Please study this manual carefully to ensure that you get the

Delta no digital pre-amplifier

Installing and using your Delta 110 pre-amplifier

Mains Supply

_ The Arcam Delta 110 may be supplied to work on any of the

following AC voltages: 110V/220V and 120V/240V (1OOV units can be
supplied to special order). Check that your local mains supply voltage
agrees with the voltage setting indicated on the back panel of the Delta

110. If not, please contact the factory or your national distributor for

details of how to proceed further

A detachable mains lead is supplied with the Delta 110. The

cores of this lead are coloured in accordance with the following code:

Green and yellow - Earth
Blue ^Neutral
Brown - Live

Note: Export units for certain markets have moulded mains

plugs fitted as standard.

As the colours in the mains lead may not correspond with
the coloured markings identifying the terminals in your plug, proceed
as follows:

The wire which is coloured green and yellow must be
connected to the terminal on the plug which is marked by the letter E or
to the safety earth symbol, or to the terminal coloured green or green
and yellow. The wire which is coloured blue must be connected to the
terminal which is marked by the letter N or coloured black or blue. The
wire which is coloured brown must be connected to the terminal which

marked by the letter L or coloured red or brown.

Fuses

If the mains plug is fused, fit a 3 amp fuse.

The AC supply inlet to the Delta 110 uses a standard lEC
chassis mounting plug.

The lEC line socket on your mains lead and the lEC plug on
the Delta II0 are a tight fit; before first using the Delta 110 it is therefore
important to ensure that the socket is firmly pushed home into the
chassis plug.

Under no circumstances should the Delta 110 cover be
removed unless the supply is disconnected at the wall socket.

Notice

1. Please retain the carton and all packaging materials
provided with this equipment so that it may be repacked correctly
if it ever becomes necessary to transport the unit or to return it
for service.

2. If servicing is required then the equipment should be
properly packed and returned to the dealer from whom it was
purchased. It is essential to include a covering letter giving your
name and address and a brief but thorough description of the fault.

Connections and warming up

There are two points that should be noted before using your

Delta no.

Firstly, it is advisable that your system is switched off before
connecting it up to the Delta 110. This will avoid possible damage to
your loudspeakers. At the very least ensure that the volume control on
the amplifier is turned down, or an unused input is selected.

Secondly, although the Delta 110 will play music within
seconds of switching on, in common with other audiophile products its
internal circuits take some time to stabilise fully. We have found that the
very best sound quality may not be obtained until the unit has had some
time, possibly up to twelve hours or more, to warm up.

Delta no digital pre-amplifier

Rear panel connections

All analogue audio inputs and outputs are via RCA phono
connectors. All the phono sockets on the Delta 110 are marked 'L' for the
left channel and 'R' for the right channel, with the left channel nearer
the top of the cabinet. Your connecting leads will be marked either 'L' or
'R', or will have a white or black plug for the left channel and a red plug
for the right.

Disc input

For the purposes of playing records, the Delta 110 can accept
both moving magnet and moving coil cartridges. For either type of
cartridge, the plugs on your turntable lead should be connected to the
disc input sockets on the rear panel of the unit. A switch just to the side
of these sockets allows the selection of either MM or MC input.
The switch should be left out for use with MM and high output MC
cartridges, and depressed for use with low output (normal)
MC cartridges.

If your turntable has a separate earth lead then this should
be firmly attached to the earth terminal to be found on the rear of the
amplifier, just above the MM/MC selector

Note

Never operate the MC/MM selector on the rear of the
amplifier with the volume control turned up, as the resultant electrical
surge may damage your loudspeakers.

A/V input

This is a line input of 200mV sensitivity. It is suitable for use
with many A/V and normal audio products, such as the Arcam Delta 150
Nicam Stereo TV tuner, the audio output of a VCR, or the analogue
output of a CD player or laser disc player

Tuner input

The tuner input is suitable for use with almost any AM or FM
tuner Connect your tuner to the pre-amplifier using the phono sockets
marked 'tuner'.

Tape inputs/outputs

The Delta 110 has the facility to connect two tape recorders,“
and is suitable for use with almost any cassette deck, open reel deck or
stereo VCR.

1. Connect the 'record'(or'line in') sockets of your tape deck
to the phono sockets marked 'out' on the rear of the Delta 110, using
phono-phono leads.

Delta 110 digital pre-amplifier

2. Connect the 'playback' (or 'line out') sockets of your tape
deck to the phono sockets marked 'in' on the rear of the Delta 110, using
phono-phono leads.

Outputs

The Delta 110 is equipped with two identical line outputs
compatible with power ampiifiers requiring inputs in the range of
500mV to 2V for full power output.

Both pairs of outputs may be used simultaneously if required.

The outputs are short-circuit proof, and are also
automatically muted at switch-on and switch-off.

The output impedance of the Delta 110 is sufficiently low at
25 ohms to allow for runs of audio cable up to about 20 metres to be
used without any serious degradation of sound quality.

Note

A pair of good quality pre to power amplifier interconnect
cables is provided as standard with the Delta 110, but please refer to
'Connecting cables' on page for further information on this
important topic.

Digital inputs

The Delta 110 incorporates an advanced Push-Pull Bitstream
digital to analogue converter

This will accept the digital output signals from compact disc
piayers or domestic DAT recorders that conform to the S/PDIF standard
(Sony/Philips digital interface). Optical and 75ohm co-axial inputs are

'■ovided. Both inputs will switch automatically between the CD

„ jmpling rate (44.1 kHz) and the DAT sampling rate (48kHz).

Both 75ohm co-axial and Toslink type optical interconnects

of approximately 0.75m length are supplied. These make connecting

your CD player or DAT player to the Delta 110 very straightforward.

If longer cables are required, they should be of the correct

type - for example, regular audio phono-to-phono cables are generally

not suitable. A 75ohm co-axial (aerial or video) cable terminated with
phono plugs should be used.

We particularly recommend AudioQuest video cables (Video
X and Video Z) obtainable from your Arcam dealer or, in case of difficulty,
directly from the factory in the U.K.

Digital monitor output

The digital monitor output is a phono-type co-axial socket
which provides an exact duplicate of the digital input seiected on the
front panel.

For example, if the co-axial input is selected, and it is
connected to your CD player, that digital signal can be fed via 75ohm
co-axial cable into the digital input of a DAT player in order to record
(assuming that the DAT player is compatible with the 44.1 kHz
sampling rate).

The digital monitor output can also be used to 'daisy chain' a
digital signal to a further outboard D/A converter or digital processor.

Note

Because the digital monitor output socket duplicates an
input signal, it cannot change the sampling frequency i.e. a 44.1 kHz
input is sent on as a 44.1 kHz signal.