Acurus A2002 - Page 8

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A 2 0 0 0 - S E R I E S A M P L I F I E R U S E R G U I D E
©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
amplier, 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 amplier 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 amplier 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-efciency loudspeakers (87dB/W/m or
greater) will reduce the average amount of amplier
power consumed to produce a target listening loud-
ness. This effectively helps reserve greater peak
amplier power when loud transient passages are
reproduced.
3. High-power ampliers (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 ampliers will tend
not to go into clipping distortion as readily as lower-
powered ampliers 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 amplier.
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 amplier is designed for simple, reliable
connections in a variety of system congurations.
Following the instructions below will ensure optimal
performance from your amplier.
Speaker Outputs
Use a high-quality speaker cable with sufcient guage
wire for the loudspeaker run lead length. Be sure to
observe consistent speaker polarity connections (plus
(+) and minus (-) speaker leads) from amplier to
loudspeaker. The Acurus A2000 series ampliers 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
L
Front left
R
Front right
C
Center
LR
Rear surround left
RR
Rear surround right
LB
Back surround left
RB
Back surround right