Chord Etude User manual

Chord Electronics
Product Communication | English
The Pumphouse, Farleigh Lane, East Farleigh, Kent, ME16 9NB. Great Britain.
[phone]
[e-mail]
chordelectronics.co.uk
Étude
Manual
-
V.1.0

Chord Electronics
Étude | Manual
_
2 // 26
Contents 0.0
1.0 Safety instructions 03
1.1 Introduction 04
1.2 Protection against liquids & heat 05
1.3 Dismantling & Radio 06
frequency interference
1.4 Connecting your equipment 07
2.0 Warranty 08
2.1 Warranty period & registering 09
your purchase
2.2 Making a claim & warranty exclusions 10
0.0 Contents
3.0 Getting to know Étude 17
3.1 Getting to know Étude 18
3.2 The front panel 19
3.3 The top panel 20
3.4 The rear panel 21
4.0 Setting up Étude 23
4.1 Placement 24
4.2 Connecting Étude to 25
ancillary equipment
4.3 Line level inputs 26
4.4 Audio outputs 27
4.5 Power-on sequence 28
4.6 Earthing issues in Europe 29
5.0 Special features 31
5.1 Bridged operation & set-up 32

Chord Electronics
Étude | Manual
_
1.1 Introduction
1.2 Protection against liquids & heat
1.3 Dismantling & Radio Frequency interference
1.4 Connecting your equipment
1.0 Safety
instructions
Safety instructions 1.0
3 // 26

Chord Electronics
Étude | Manual
_
4 // 26
Introduction 1.1
Étude is an incredibly
dynamic next-generation
power amplifier which
uses a brand new analogue
amplifier topology, Chord
Electronics’ first all-new design
since its inception.
Before operation, we strongly
advise that you read this user
manual thoroughly, storing it in a
safe place along with your original
receipt of purchase, in case you
should require assistance in the
future.
1.1 Introduction
1.2 Protection against
liquids & heat
1.3 Dismantling & radio frequency
interference
1.4 Connecting your equipment

Chord Electronics
Étude | Manual
_
Protection against
liquids & heat
1.2
The Étude is not
protected against liquids
of any kind. Never place
containers of liquid on Étude.
Never allow Étude to come
into contact with moisture or
liquids; doing so could result in
electrocution or damage to the
Étude’s internal circuitry.
Be aware that liquids, including
water that has dried, can leave
minerals that can aect the
PCB and other components,
which could eventually lead to
oxidisation and short-circuiting.
If the Étude comes into contact
with moisture or liquids,
immediately disconnect from
the mains power supply, and
connected equipment, and
contact Chord Electronics for
further advice.
The Étude has internal
thermal protection which
will increase the speed
of the cooling fans if excessive
temperatures are being reached.
Should this occur then check that
Étude has adequate ventilation
and/or reduce the volume level
until Étude has cooled and the
fans slowed.
Never operate the Étude near
sources of heat or naked flames
as this will decrease the lifespan
of the internal components. It is
advised that you do not operate
the Étude in an area of direct
sunlight or on top of significant
heat- producing devices.
Please be aware that it is entirely
normal for the Étude to become
warm during use, particularly
within a stacked configuration.
If you are concerned about the
temperatures, please switch
the device o and consider a
dierent placement.
1.1 Introduction
1.2 Protection against
liquids & heat
1.3 Dismantling & radio frequency
interference
1.4 Connecting your equipment
5 // 26

Chord Electronics
Étude | Manual
_
6 // 26
There are no user-
serviceable components
within the Étude or
its power supply. Dangerous
voltages/currents exist within
the Étude and its power
supply, posing a severe risk of
electrocution and/or fire.
Never attempt to
open, dismantle or
apply internal third-
party devices to it or insert
anything other than the listed
interconnects or speaker cables
within this user manual.
If the Étude develops a fault or
the casework becomes damaged,
immediately disconnect from
the mains power supply and
connected equipment and
contact Chord Electronics for
further advice.
1.1 Introduction
1.2 Protection against
liquids & heat
1.3 Dismantling & radio frequency
interference
1.4 Connecting your equipment
Dismantling & radio
frequency interference
1.3
With a thick, solid aluminium
chassis, Étude’s casework
largely protects the sensitive
internal circuitry from radio
frequency interference. However,
for optimal performance, it is
recommended that the following
points are observed:
1.Consider placing the
Étude away from
wireless routers.
2.Separate the
Étude from
amplifiers using
toroidal transformers.
3. Operate mobile
phones at a distance
to avoid interference.
Although the Étude
is largely shielded, it
can generate radio
frequency interference that
may have an eect on radio
and television reception. If this
occurs, please reconsider your
placement.

Chord Electronics
Étude | Manual
_
Before connecting the Étude
to any equipment, consult the
manufacturer’s user guide to
confirm compatibility.
When connecting the Étude to
any equipment, make sure that
all devices are o, including the
Étude. Once connected, switch
all equipment on starting with
the source and ending with the
amplification. Initially, operate
the Étude with your preamp/
device on its lowest gain setting
and lowest volume setting, gently
increasing to a comfortable
listening level. Never operate the
Étude at excessive sound levels;
permanent hearing damage and
loss can occur.
Étude is supplied with its own
grounded 10A-rated mains
IEC cable and it is important
that the amplifier is earthed at
all times via this cable, or an
appropriate alternative. Failure
to do this could be hazardous
in the unlikely event of a fault.
Étude employs an auto-sensing
mains input voltage circuit and
will adjust to suit your region’s
supply; Étude will operate
between 120V AC and 240V
AC -50Hz - 60Hz. Étude is
fully protected in the event of
a short circuit or fault and will
automatically shut down.
Étude’s supplied region-specific
10A mains IEC cable can be
supplemented for an alternative
power cable, however, please
make sure that it has an earth. If
any cable becomes damaged you
must discontinue use and replace
it immediately to avoid the risk of
electrocution.
Étude must be permanently
connected to a source of power.
The included mains lead simply
plugs into the Étude’s IEC mains
socket. If the mains lead is
prematurely disconnected Étude
may still remain active for up to
15 minutes.
1.1 Introduction
1.2 Protection against
liquids & heat
1.3 Dismantling & radio frequency
interference
1.4 Connecting your equipment
Connecting your equipment 1.4
WARNING: Never
disconnect the
power cable during
operation. Only disconnect
when Étude is o. If the
power cable is disconnected
during operation there is a
risk of damage to connected
equipment.
7 // 26

Chord Electronics
Étude | Manual
_
2.1 Warranty period & registering your purchase
2.2 Making a claim & warranty exclusions
2.0 Warranty
Warranty 2.0
8 // 26

Chord Electronics
Étude | Manual
_
9 // 26
2.1 Warranty period & registering
your purchase
2.2 Making a claim & warranty
exclusions
Warranty period & registering
your purchase
2.1
At point of sale, Chord
Electronics Ltd. provides the
Étude with a comprehensive
five-year warranty* which
covers defects in materials and
workmanship through fair wear
and tear.
*The warranty is transferable
with proof of purchase,
however is not available on ex-
demonstration products.
Please use the form
below to record the
details of your purchase
in the event that these are
required at a later date, we
further advise that all purchases
are registered with Chord
Electronics at: chordelectronics.
co.uk/register-product/
RETAILER:
PURCHASE PRICE:
UNIT COLOUR:
DATE OF PURCHASE:
TRANSACTION ID:

Chord Electronics
Étude | Manual
_
In the unlikely event of a
claim, you must provide Chord
Electronics with the details of
the claim, including your original
proof of purchase and serial
number in order to validate the
nature of the repair.
Upon receipt, Chord Electronics
will make an assessment within
30 days and provide a reasonable
solution.
All warranty repairs must be
carried out by Chord Electronics
or an approved service centre to
guarantee the quality and safety
of the repair.
WARRANTY EXCLUSIONS: The
warranty does not cover connected
equipment, personal injury or
development natural patina of the
metalwork and will be null and void
if the following is applied: wilful
neglect; modification or tampering
of the product; improper use of the
product; acts of God; damage caused
by a connected device; mechanical
shock; fire or application of excessive
heat or repair/modification by a non-
authorised third-party vendor.
2.1 Warranty period & registering
your purchase
2.2 Making a claim & warranty
exclusions
Making a claim
& warranty exclusions
2.2
10 // 26

Chord Electronics
Étude | Manual
_
3.1 Getting to know Étude
3.2 The front panel
3.3 The top panel
3.4 The rear panel
3.0 Getting to know
Étude
Getting to know
Étude
3.0
11 // 26

Chord Electronics
Étude | Manual
_
Étude is an incredibly dynamic
next-generation power amplifier
which uses a brand new
analogue amplifier topology,
Chord Electronics’ first all-new
design since its inception.
Before operation, we strongly
advise you read this user manual
thoroughly, storing it in a safe
place along with your original
receipt of purchase, should you
require assistance in the future.
3.1 Getting to know Étude
3.2 The front panel
3.3 The top panel
3.4 The rear panel
Getting to know Étude 3.1
12 // 26

Chord Electronics
Étude | Manual
_
Étude has no user-controlled
buttons on the front panel and
simply features a ventilation
system integrated into the
casework.
3.1 Getting to know Étude
3.2 The front panel
3.3 The top panel
3.4 The rear panel
The front panel 3.2
13 // 26
WARNING: You must
keep all vents clear.

Chord Electronics
Étude | Manual
_
Similar to the front panel, the
top panel of the device also has
no user-controlled buttons and
simply features two ventilation
systems integrated into the
casework.
3.1 Getting to know Étude
3.2 The front panel
3.3 The top panel
3.4 The rear panel
The top panel 3.3
14 // 26
WARNING: You must
keep all vents clear.

Chord Electronics
Étude | Manual
_
The rear panel oers a
comprehensive connectivity
suite, featuring both balanced
and unbalanced inputs for
connection to preamps and
audiophile-grade 30-amp
loudspeaker binding terminals,
suitable for use with banana- and
spade-type speaker plugs.
3.1 Getting to know Étude
3.2 The front panel
3.3 The top panel
3.4 The rear panel
The rear panel 3.4
15 // 26
WARNING: You must
keep all vents clear.
Mains input
On/o switch
Left channel positive
speaker terminal
Left channel negative
speaker terminal
Right channel negative
speaker terminal
Right channel positive
speaker terminal
Left channel balanced
XLR input
Right channel balanced
XLR input
Left channel unbalanced
RCA input
Right channel unbalanced
RCA input
Phase
toggle R/L
The rear panel also features the
IEC mains input for use with the
supplied power cable, an on/o
single analogue rocker switch
and a phase toggle switch for
each channel.

Chord Electronics
Étude | Manual
_
4.1 Placement
4.2 Connecting Étude to ancillary equipment
4.3 Line level inputs
4.4 Audio outputs
4.5 Power-on sequence
4.6 Earthing issues in Europe
4.0 Setting up
Étude
Setting up
Étude
4.0
16 // 26

Chord Electronics
Étude | Manual
_
Whilst Étude will operate
normally within a stack of
other Chord Electronics Choral
components within the Choral
Ensemble stand/floor system, it
is recommended that the device
is allowed to ‘breathe’ with 10cm
of space around it to convection-
cool during operation.
For this reason we recommend
the Chord Electronics Ensemble
stand, as shown.
4.1 Placement
4.2 Connecting Étude to
ancillary equipment
4.3 Line level inputs
4.4 Audio outputs
4.5 Power-on sequence
4.6 Earthing issues in Europe
Placement 4.1
17 // 26

Chord Electronics
Étude | Manual
_
When connecting the Étude to
equipment within the signal path,
ensure all devices are switched
o. It is recommended that
once all equipment is properly
connected, that the volume
setting is operated to its lowest
setting, before slowly being
raised to a comfortable listening
level. Always observe partnering
manufacturers’ guidelines.
4.1 Placement
4.2 Connecting Étude to
ancillary equipment
4.3 Line level inputs
4.4 Audio outputs
4.5 Power-on sequence
4.6 Earthing issues in Europe
Connecting Étude to ancillary
equipment
4.2
18 // 26

Chord Electronics
Étude | Manual
_
Étude is equipped with a stereo
pair of unbalanced (single-
ended) RCA inputs and a stereo
pair of balanced XLR inputs.
Étude has no ability to switch
between the inputs, therefore,
only one must be used. Connect
the left and right line input
channels on Étude with the
corresponding line outputs
on your preamp or device and
double-check.
4.1 Placement
4.2 Connecting Étude to
ancillary equipment
4.3 Line level inputs
4.4 Audio outputs
4.5 Power-on sequence
4.6 Earthing issues in Europe
Line level inputs 4.3
19 // 26
Étude also features a phase
toggle switch for each channel.
In normal stereo mode where
one power amplifier is being
used, both toggle switches
should remain in the same
‘down’ position. The amplifier
can also be used in bridged
mode, requiring an alternative
phase switch position; details on
this and bridging mode can be
found further on under Special
Features.
WARNING: Étude
must be connected
to a dedicated
preamplifier, or a device
capable of attenuating its
output. Failure to attenuate
the volume before it enters
Étude could result in
irreversible hearing damage,
speaker damage and could
void the warranty.
Left channel balanced
XLR input
Right channel balanced
XLR input
Left channel unbalanced
RCA input
Right channel unbalanced
RCA input
Phase
toggle R/L

Chord Electronics
Étude | Manual
_
Étude supports a single stereo
output. In order to connect Étude
to loudspeakers, use high-quality
loudspeaker cable terminated
with 4mm banana plugs or 6mm
spades. Bare wire can be used,
but it is not recommended.
4.1 Placement
4.2 Connecting Étude to
ancillary equipment
4.3 Line level inputs
4.4 Audio outputs
4.5 Power-on sequence
4.6 Earthing issues in Europe
Audio outputs 4.4
20 // 26
Connect the black (negative)
terminal from Étude to the
negative terminal on your
loudspeaker and the red
(positive) terminal from Étude to
the red positive terminal on your
loudspeaker. Repeat for each
channel.
Left channel positive
speaker terminal
Left channel negative
speaker terminal
Right channel negative
speaker terminal
Right channel positive
speaker terminal