Acurus A2002 Manuale utente
A2000-Series Amplier User Guide
2, 5 and 7-channel models
Document No. 1000571
2A2000-SERIES AMPLIFIER USER GUIDE ©2012 Indy Audio Labs, LLC all rights reserved / Revision20120420
Document No. 1000571
1. Read Instructions – All safety and operating instructions should be
read before operating the device.
2. Retain Instructions – The safety and operating instructions should be
retained for future reference.
3. Heed Warnings – All warnings on the device and in the operating
instructions should be adhered to.
4. Follow instructions – All operating and safety instructions should
be followed.
5. Attachments – Do not use attachments not recommended by the
product manufacturer as they may cause hazards.
6. Water and Moisture – Do not use this product near water (for
example, near a bath tub, wash bowl, kitchen sink, or laundry tub;
in a wet basement; or near a swimming pool; and the like).
7. Ventilation – Slots and openings in the cabinet are provided for
ventilation and to ensure reliable operation of the product and to
protect it from overheating, and these openings must not be blocked
or covered. The openings should never be blocked by placing the
product on a bed, sofa, rug, or other similar surface. This product
should not be placed in a built-in installation such as a bookcase
or rack unless proper ventilation is provided or the manufacturer’s
instructions have been adhered to.
8. Heat – This product should be situated away from heat sources
such as radiators, heat registers, stoves, or other products that
produce heat.
9. Power Sources – This product should be operated only from the
type of power source indicated on the marking label. If you are not
sure of the type of power supply in your home, consult with your
product dealer or the local power company. For products intended
to operate from battery power, or other sources, refer to the
operating instructions.
10. Grounding – This product is equipped with a three-wire grounding-
type plug, a plug having a third (grounding) pin. This plug will only
fit into a grounding-type power outlet. This is a safety feature. If you
are unable to insert the plug into the outlet, contact your electrician
to replace your obsolete outlet. Do not defeat the safety purpose of
the grounding-type plug.
11. Power Cord Protection – Power supply cords should be routed
so that they are not likely to be walked on or pinched by items
placed upon or against them, paying particular attention to cords
at plugs, convenience receptacles, and the point where they exit
from the product.
12. Overloading – Do not overload wall outlets, extension cords, or
integral convenience receptacles as this can result in a risk of fire
or electrical shock.
13. Lightning and Periods of Non-Use – For added protection for this
product during a lightning storm, or when it is left unattended and
unused for long periods of time, unplug it from the wall outlet and
IMPORTANT SAFETY INSTRUCTIONS
CAUTION:
RISK OF ELECTRIC SHOCK!
DO NOT OPEN!
CAUTION! To reduce the risk of electric shock and fire, do not remove the cover or back plate of the device
enclosure. There are no user serviceable parts inside. Refer servicing to an Acurus authorized service center.
CAUTION! The international symbol of a lightning bolt inside a triangle is intended to alert the user to
uninsulated “dangerous voltage” within the device enclosure. The international symbol of an exclamation
point inside a triangle is intended to alert the user to the presence of important operating, maintenance and
servicing information in the manual accompanying the device.
WARNING! To reduce the risk of fire or electrical shock, do not expose this equipment to rain or moisture.
disconnect the antenna or cable system. This will prevent damage
to the product due to lightning and powerline surges.
14. Cleaning – Unplug this product from the wall outlet before cleaning.
Do not use liquid cleaners or aerosol cleaners. Use a damp cloth
for cleaning.
15. Object and Liquid Entry – Never push objects of any kind into this
product through openings as they may touch dangerous voltage
points or short-out parts that could result in a fire or electric shock.
Never spill liquid of any kind on the product.
16. Damage Requiring Service – Unplug this product from the wall
outlet and refer servicing to qualified service personnel under the
following conditions:
a) When the power supply cord or plug is damaged,
b) If liquid has been spilled, or objects have fallen into the product,
c) If the product has been exposed to rain or water,
d) If the product does not operate normally by following the
operating instructions. Adjust only those controls that are covered
by the operating instructions as an improper adjustment of other
controls may result in damage and often will require extensive
work by a qualified technician to restore the product to its
normal operation,
e) If the product has been dropped or damaged in any way, or
f) When the product exhibits a distinct change in performance – this
indicates a need for service.
17. Replacement Parts – When replacement parts are required, be sure
the service technician has used replacement parts specified by the
manufacturer or that have the same characteristics as the original
parts. Unauthorized substitutions may result in fire, electric shock,
or other hazards.
18. Safety Check – Upon completion of any service or repairs to this
product, ask the service technician to perform safety checks to
determine that the product is in proper operating condition.
19. Servicing – Do not attempt to service this product yourself as
opening or removing covers may expose you to dangerous voltage
or other hazards. Refer all servicing to qualified service personnel.
If this unit is purchased outside of the U.S., please contact your
local dealer or distributor for service center information. If purchased
inside the U.S. and dealer service is not available, contact Acurus
Customer Service for a return authorization (RA) number before
shipping. For further service information, contact:
ACURUS CUSTOMER SERVICE
phone: 1-866-781-7284
email: support@acurusav.com
5225 EXPLORATION DRIVE
INDIANAPOLIS, IN 46241
3
A2000-SERIES AMPLIFIER USER GUIDE
©2012 Indy Audio Labs, LLC all rights reserved / Revision20120420
Document No. 1000571
2
Important Safety Instructions
5
Becoming Familiar with Your
New Acurus Amplifier
Front Panel
Exterior Surfaces
Rear and Bottom Panel
9
Operation
Standby Mode
Normal Operation
Acurus’ Proprietary Enhanced
Ethernet Control (E2C)
Amplier Control and
Status using E2C
18
Design Notes
3
Contents
7
Placement and Setup
Shelf Mounting
Rack Mounting
14
Problem Resolution
Troubleshooting Table
Obtaining Additional Help
19
Warranty
U.S. and Canada
Applicable Territories
4
Congratulations
Unpacking
Outer and Inner Carton
Package Contents
Retain your Packaging
Register your Product
Record your Unit Information
8
System Planning and Optimizing
Making System Connections
Speaker Outputs
Audio Inputs
Pre-amp On/Off Control
Mains (AC) Power
Control Networks
16
Technical Specifications
A2002 Architects and
Engineering Specications
A2005 Architects and
Engineering Specications
A2007 Architects and
Engineering Specications
20
About Acurus and
Indy Audio Labs
contents
4A2000-SERIES AMPLIFIER USER GUIDE ©2012 Indy Audio Labs, LLC all rights reserved / Revision20120420
Document No. 1000571
congratulations
Congratulations on your purchase of an Acurus A2000-
series 2, 5 or 7-channel amplier. Each Acurus A2000
series amplier is a state-of-the-art component featuring
high-end audio performance combined with unprec-
edented control and connectivity. Years of dedicated
research, extensive testing, and engineering renement
went into the creation of this product. Since 1993, Acu-
rus has been delivering high-value, high-performance
electronics. Just like the rst Acurus amps to roll off the
assembly line nearly 20 years ago, your Acurus was
designed, hand-assembled and tested with pride by
engineers, technicians and skilled assemblers in the
United States of America. You should expect years of
trouble-free operation from your product investment.
Acurus components offer unparalleled performance and
control exibility for the most discriminating listener. Your
A2000-series amplier incorporates many advanced
design and construction features combined
in a superbly crafted amplier.
unpacking
Outer and Inner Carton
Using a sharp object such as a knife or scissors, care-
fully open the outer single-walled (brown) shipping car-
ton and inner double-walled (white) packaging cartons
along their top seams.
Your Acurus amplier is wrapped in a protective poly
bag and sandwiched between 100% recycled foam
bumpers. Carefully lift the amplier out of the package
with the foam bumpers attached.
TEAM LIFT! - To Avoid injury, lift with
someone else - your amplifier is very heavy!
Package Contents
Inside the box you should nd the following:
1. Acurus amplifier
1. Foam Bumpers (2)
1. Power Cord
1. User Guide
1. Warranty Card
In the unlikely event of any of the above items
missing, immediately contact your dealer or
Acurus Customer Service:
ACURUS CUSTOMER SERVICE
phone: 1-866-781-7284
email: support@acurusav.com
5225 EXPLORATION DRIVE
INDIANAPOLIS, IN 46241
Retain your Packaging
We highly recommend retaining your box and packag-
ing materials as these are the best way to protect your
amplier in transit. Should warranty service be required,
you MUST either use your original packaging materials
or request new packaging from Acurus Customer Serv-
ice (for a nominal fee).
Register your Product
In order to validate your purchase and qualify for the full
ve (5) year parts and labor manufacturer’s warranty on
your new Acurus product, you must have purchased it
from an authorized Acurus retailer AND you must return
the included warranty card completely lled out within
30 days of purchase.
Record your Unit Information
For future reference, we recommend recording your
product information here:
Model No.
Serial No.
Date of Purchase
Date Registration Sent
5
A2000-SERIES AMPLIFIER USER GUIDE
©2012 Indy Audio Labs, LLC all rights reserved / Revision20120420
Document No. 1000571
becoming familiar
with your new
acurus amplifier
Your Acurus amplier has been engineered to provide
years of trouble-free enjoyment when installed and used
according to this guide. This section will help you get fa-
miliarized with all the physical features of this component.
Front Panel
The front-panel design of your new Acurus was execut-
ed with beauty, simplicity and control condence as
the primary goals.
Power Button: To turn on your amplier, simply press the
power button. This custom-designed solid aluminum
push-button responds with positive feedback. For auto-
matic turn-on via an external pre-amp or pre-amp/proc-
essor, see section entitiled Pre-amp On/Off Control, p9.
Status Light: Our proprietary status light design consists
of a light ring surrounding the power button. This status
light is clearly visible at a wide range of angles and in
varying lighting conditions. It indicates amplier status
as shown below:
indication meaning
unlit No power input
steady red Low-power (idle) mode
flashing red Amplifier circuits initializing
blue Amplifier ON
After pushing the power button, the light ring remains
red briey as the amplier circuits are initialized.
Once ready for audio, the light ring illuminates blue.
To adjust the brightness of the light ring indicator for
your particular environment via Acurus Enhanced Ether-
net Control (E2C), see section entitled Acurus’ Propri-
etary Enhanced Ethernet Control (E2C), p10.
Exterior Surfaces
The top and sides of your Acurus amplier are designed
for both style and function.
Top Cover: The brushed aluminum top cover contains
ventillation slots to allow convective air ow through the
internal chassis, drawing air from underneath to keep
the internal circuit cards and transformer running cooler.
Sides: The extruded aluminum sides include heat trans-
fer ns to direct heat away from the internal amplier
circuits to the ambient air. Unlike many other amplier
designs, Acurus A2000-series amplier ns are mounted
externally to achieve the most effective convective
cooling action for all channels in both cabinet-mount
and rack-mount installations.
6A2000-SERIES AMPLIFIER USER GUIDE ©2012 Indy Audio Labs, LLC all rights reserved / Revision20120420
Document No. 1000571
Rear and Bottom Panel
The rear panel of your Acurus amplier has been pains-
takingly designed for ease of installation.
Rear panel nish: The rear chassis features a durable
powdercoat nish to provide both scratch resistance
and high-contrast colors for installation in dimly-lit
environments. All labels are clear and concise utilizing
easy-to-read fonts.
Speaker Outputs: Speaker outputs are discrete, rug-
ged, 60-amp gold-plated binding posts with anti-touch
protective clear housings.
All posts are color-coded with red and black rings for
+ and - speaker polarity and are spaced in pairs to ac-
commodate dual banana jacks. All pairs are angled to
minimize tangling and strain on heavy gauge speaker
wire exits, particularly in rack installations.
Audio Inputs: Each audio input consists of a high-
conductivity, gold-plated, isolated RCA jack logically ar-
ranged near its corresponding output connection. Rear
panel graphics clearly indicate which inputs correspond
to which outputs.
AC Mains Inlet: The AC mains inlet is a removeable IEC-
320-style high-current appliance inlet with integral mains
fuse holder. This inlet is approved for international use.
Network Module: Your new Acurus ampler includes
built-in remote control and networking capabilities that
provide a wide array of options and ultimate installation
exibility. All these functions are provided in an upgrade-
able hardware card.
1 - External 12V Trigger Input Within the network
module section, a 3.5mm jack allows for connection to a
typical 5-24V trigger output from an external pre-amp or
pre-amp/processor via a stereo 3.5mm cable.
2 - System Controller (RS-232) Input The network mod-
ule section contains an RS-232 DB-9 connector for inter-
face to an external system controller. Contact Indy Audio
Labs for a list of veried control system manufacturers.
3 - Ethernet Network Active LED The Ethernet Network
Active LED illuminates green with an active network
connection between the Acurus amplier and a network
switch or router.
1 2 3 4
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A2000-SERIES AMPLIFIER USER GUIDE
©2012 Indy Audio Labs, LLC all rights reserved / Revision20120420
Document No. 1000571
4 - Ethernet Jack The Ethernet jack enables connection
to either an external system controller or to a standard
home Ethernet 10/100 network switch or router port.
Control and status monitoring of the amplier using any
device with a web browser is supported via the web
server embedded in the Acurus amplier.
Feet: Heavy-duty thermoplastic rubber feet ensure good
underside airow, isolate your amplier from external
vibration and protect the surface nish of AV furniture
underneath.
For rack-mount installations where other equipment is in-
stalled directly adjacent, these feet are easily removed.
placement
and setup
An enjoyable home entertainment experience always
begins with carefully planned placement and setup of
system components. This section will provide guidance
on how to best install your new Acurus amplier.
Shelf Mounting
When planning to mount on a shelf, be aware of the
physical dimensions of your Acurus amplier as outlined
in the section entitled Technical Specifications, p16.
It is ALWAYS advisable to:
1. Provide ample space above the unit (1-2 inches is
the minimum preferred)
2. Provide plenty of room (at least 1-2 inches) between
the sides of the unit at nearby surfaces or other
components
3. Locate the unit near an AC outlet or power condition-
er and avoid using extension cords or power strips
4. Locate the amplier as close as possible to the pre-
amp or pre-processor
5. Use as short length wire leads as practical, espe-
cially on the amplier inputs
6. Connect the amplier to the same mains circuit as
the pre-amplier
It is NEVER advisable to:
1. Enclose the unit in a cabinet without air ow or ad-
equate ventilation, particularly across the heat ns
along the side and back of the unit.
2. Place the unit near a source of moisture such as a
window or a live plant
3. Place other components in a stack on top of the
amplier
4. Place the amplier on a carpeted surface
5. Remove the safety ground connector from the AC
mains cord
Rack Mounting
Your Acurus amplier can easily be congured to mount
in a standard 19-inch rack cabinet with an optional
Acurus rack mount accessory kit. Hardware and
detailed installation instructions are included.
Contact your dealer or Acurus Customer Service with questions or
to request the rack mount kit designed specifically for your amplifier
model.
model acurus rack-mount kit part number
A2002 1000548
A2005 1000549
A2007 1000549
8A2000-SERIES AMPLIFIER USER GUIDE ©2012 Indy Audio Labs, LLC all rights reserved / Revision20120420
Document No. 1000571
system planning
and optimizing
In order to experience the best performance from your
amplier, the entire system needs to be planned and
components carefully selected to work together. Your
authorized Acurus dealer is trained to be able to help
you ensure your components work well together.
The following are some helpful guidelines to ensure your
Acurus amplier is well-matched to the other compo-
nents in your system.
1. Quality loudspeakers can have a dramatic impact
on overall sound quality in a system for a given
room environment. When planning or upgrad-
ing a system, as a rule of thumb, we recommend
budgeting for loudspeakers at or somewhat above
the price range of your amplier electronics. Your
Acurus dealer will be able to advise you on best
loudspeaker selection for your electronics, your
environment, and, most importantly, your listening
preferences.
2. Using higher-efciency loudspeakers (87dB/W/m or
greater) will reduce the average amount of amplier
power consumed to produce a target listening loud-
ness. This effectively helps reserve greater peak
amplier power when loud transient passages are
reproduced.
3. High-power ampliers (over 100W continuous into
8 ohms) are generally OK to pair with speakers with
slightly lower power ratings, particularly if subwoof-
ers are involved. Higher-power ampliers will tend
not to go into clipping distortion as readily as lower-
powered ampliers or receivers. Clipping is a type
of distortion that is prone to damage loudspeakers.
4. Preamps should be chosen with output voltage
swing capability equal to or greater than the ampli-
er sensitivity spec for full rated power output (for
example, 1.42V for full rated output). Similarly, an
ideal preamp choice has a noise spec less than or
equal to that of the power amplier.
5. Well-designed computer-based audio sources
should have isolated grounds in order to avoid
hum and buzz associated with connecting audio
systems with typical digital system power supplies.
Your Acurus dealer can recommend good quality
components that meet these criteria.
6. Systems with cable TV or sattelite source com-
ponents may need isolation transformers or other
ground isolation devices (such as the Modial
“MAGIC” box) in order to reduce or eliminate hum
due to ground loops.
making system
connections
Your Acurus amplier is designed for simple, reliable
connections in a variety of system congurations.
Following the instructions below will ensure optimal
performance from your amplier.
Speaker Outputs
Use a high-quality speaker cable with sufcient guage
wire for the loudspeaker run lead length. Be sure to
observe consistent speaker polarity connections (plus
(+) and minus (-) speaker leads) from amplier to
loudspeaker. The Acurus A2000 series ampliers are
non-polarity inverting.
Physical connection options supported include bare
wire, single banana post, dual banana post, spade con-
nector and wire lead.
Connect loudspeakers to their corresponding speaker
terminals as follows:
rear panel label loudspeaker position
LFront left
RFront right
CCenter
LR Rear surround left
RR Rear surround right
LB Back surround left
RB Back surround right
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A2000-SERIES AMPLIFIER USER GUIDE
©2012 Indy Audio Labs, LLC all rights reserved / Revision20120420
Document No. 1000571
Audio Inputs
We recommend using good quality RCA interconnects
to connect the preamp output to the amplier inputs.
Use the same connection scheme as in the table above.
Pre-amp On/Off Control
To enable an external 2-channel or surround preamp
to power on your Acurus amplier, connect the trigger
out from the preamp to the the 3.5mm jack labelled 12V
trigger on the Acurus. The jack is wired with its tip active
and will accept a stereo or mono plug.
NOTE: the front panel power button functions
normally even if the trigger input is used.
The Acurus amplifier will automatically
resume control sync with the external preamp
after the next time system power is cycled.
Mains (AC) Power
Your Acurus A2000 series amplier is equipped with a
high-quality 16 gauge, 3-conductor power cord. Plug
this cord into the back of the amplier and then into
a nearby AC outlet. Avoid using any extension cords
or plugging into other components with rear-panel
switched outlets. If using the amplier with a power con-
ditioner, ensure that the receptacle your amplier plugs
into is capable of providing the full current required by
the amplier. See section entitled Technical Specifica-
tions, p16 for a list of current requirements for each
model amplier in the A2000 series.
It is recommended practice to connect AC
power only after all other connections have
been made.
3.5mm stereo plug
1 – Ground
2 – Ground
3 – Trigger Voltage
Control Networks
Ethernet: In order to take advantage of Acurus En-
hanced Ethernet Control (E2C), connect the Ethernet
port to a 10/100 or faster home network router or switch
port via a standard CAT 5e or newer Ethernet cable. The
network activity indicator near the Ethernet jack illumi-
nates green when network activity is detected.
This port may also be directly connected to a system
controller utilizing Ethernet command protocols. Con-
tact your dealer or Acurus Customer Service in order to
verify compatibility with certain control systems.
RS-232: Connect this port to a system controller using a
9-pin RS-232 serial cable in order to control and monitor
the amplier remotely. Contact your dealer or Acurus
Customer Service in order to verify compatibility with
certain control systems.
operation
This section discusses the normal operation of your
Acurus amplier and highlights the control exibility
engineered into this component.
Standby Mode
When rst connected to AC power, your Acurus amplier
initializes in standby mode. This is indicated by a red
illuminated Status Light. Normally, the initialization proc-
ess takes a few seconds. Once the amplier is initial-
ized, it is ready to be powered on.
Before powering on, ensure that your preamp
volume level is not too high or else speaker
damage may occur.
Turn on the amplier by pressing the front panel power
button. If an external trigger input from a preamp is
used, turning on the preamp should automatically turn
on the amplier. The Status Light turns blue indicating
the amplier is active. Toggling the power button again
puts the amplier back into standby mode.
1 2 3
10 A2000-SERIES AMPLIFIER USER GUIDE ©2012 Indy Audio Labs, LLC all rights reserved / Revision20120420
Document No. 1000571
LAST ON, FIRST OFF! – To avoid potential
loud pops and/or hum, always turn on the
amplifer last after other components such
as pre-amps and sources and turn off the
amplifer first when powering down.
Normal Operation
Observe these simple guidelines during normal operation:
Source Material: Your Acurus amplier will sound only as
good as the source material it is amplifying. We recom-
mend CD-quality or higher bitrate sources in order to
experience the full capabilities of your new amplier.
You’ll probably nd that MP3 or other lossy, compressed
(less than 256Kbps bitrate) source audio lack the detail
and denition that your Acurus components are capable
of delivering.
Break In Period: While we burn-in each unit at the fac-
tory before it is shipped, we recommend playing your
amplier a minium of 24 hours before performing any
critical listening.
When not in Use: We do not recommend leaving the
amplier on continuously as a means of somehow
improving it’s long-term reliability or sonics. As with
prior Acurus designs, we’ve designed the A2000 series
ampliers to come up to operating temperature in a few
short minutes and have chosen components that can
handle temperature cycles well beyond the intended life
of the product.
We can minimize electric utilization and preserve our
global environment by taking advantage of the low-pow-
er standby mode these ampliers offer.
Acurus’ Proprietary Enhanced
Ethernet Control (E2C)
Enhanced Ethernet Control allows the user or installer to
quickly and easily control and monitor the status of Acu-
rus components over a home network. For the A2000
series ampliers, this capability provides a useful setup
and diagnostic tool.
Setting up Enhanced Ethernet Control (E2C): To enable
E2C, the amplier must be connected directly to a net-
work router or switch as indicated by the green network
activity LED on the rear panel of the amplier. After a
couple minutes connected to the network, the amplier
network module will be initialized and the amplier will
be controllable as a network device.
Any networked computer, smartphone or tablet con-
nected to the local network and running up-to-date web
browser software may be used to control and monitor
the amplier. To access the control page of the amplier,
the amplier’s IP address must be typed in the browser
URL line of the controlling device.:
Because most network routers default to allow DHCP
(service running on the router) to automatically assign
IP addresses to network devices, it is necessary rst to
discover the specic IP address assigned to the ampli-
er by the network router. There are a few common
methods to accomplish this.
Manual Network Discovery: Below are several methods
that can be used to discover an Acurus A2000 series
amplier on a local network. The critical information
for identifying the Acurus component is that the A2000
series mac address always is formatted with the rst 3
pairs of numbers constant as:
MAC Address 00:03:75:XX:YY:ZZ
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