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IMPORTANT SAFETY INSTRUCTIONS
safety-4v2.eps Aug 26/05
CAUTION
:
TO REDUCE THE RISK OF ELECTRIC SHOCK, DO
NOT REMOVE COVER (OR BACK).
NO USER SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
INSTRUCTIONS PERTAINING TO A
RISK OF FIRE, ELECTRIC SHOCK,
OR INJURY TO PERSONS
Read Instructions
The Owner’s Manualshould be read and understood
before operation of your unit. Please, save these instruc-
tions for future reference.
Packaging
Keep the box and packaging materials, in case the unit
needs to be returned for service.
Warning
When using electric products, basic precautions should
always be followed, including the following:
Power Sources
Your unit should be connected to a power source only of the voltage
specified in the owners manual or as marked on the unit. This unit has
a polarized plug. Do not use with an extension cord or receptacle
unless the plug can be fully inserted. Precautions should be taken so
that the grounding scheme on the unit is not defeated.
Hazards
Do not place this product on an unstable cart, stand, tripod, bracket or
table. The product may fall, causing serious personal injury and serious
damage to the product. Use only with cart, stand, tripod, bracket, or
table recommended by the manufacturer or sold with the product.
Follow the manufacturer’s instructions when installing the product and
use mounting accessories recommended by the manufacturer.
The apparatus should not be exposed to dripping or splashing water;
no objects filled with liquids should be placed on the apparatus.
Terminals marked with the “lightning bolt” are hazardous live; the
external wiring connected to these terminals require installation by an
instructed person or the use of ready made leads or cords.
No naked flame sources, such as lighted candles, should be
placed on the apparatus.
Power Cord
The AC supply cord should be routed so that it is unlikely that it will be
damaged. If the AC supply cord is damaged DO NOT OPERATE THE UNIT.
Service
The unit should be serviced only by qualified service personnel.
AVIS:
AFIN DE REDUIRE LES RISQUE DE CHOC ELECTRIQUE,
N’ENLEVEZ PAS LE COUVERT (OU LE PANNEAU ARRIERE)
NE CONTIENT AUCUNE PIECE
REPARABLE PAR L’UTILISATEUR.
CONSULTEZ UN TECHNICIEN QUALIFIE
POUR L’ENTRETIENT
INSTRUCTIONS RELATIVES AU RISQUE
DE FEU, CHOC ÉLECTRIQUE, OU
BLESSURES AUX PERSONNES
Veuillez Lire le Manuel
Il contient des informations qui devraient êtres comprises
avant l’opération de votre appareil. Conservez S.V.P. ces
instructions pour consultations ultérieures.
Emballage
Conservez la boite au cas ou l’appareil devait être
retourner pour réparation.
Attention:
Lors de l’utilisation de produits électrique, assurez-vous
d’adhérer à des précautions de bases incluant celle qui
suivent:
Alimentation
L’appareil ne doit être branché qu’à une source d’alimentation
correspondant au voltage spécifié dans le manuel ou tel qu’indiqué sur
l’appareil. Cet appareil est équipé d’une prise d’alimentation polarisée.
Ne pas utiliser cet appareil avec un cordon de raccordement à moins
qu’il soit possible d’insérer complètement les trois lames. Des
pré
cautions doivent êtres prises afin d’eviter que le système de mise à
la terre de l’appareil ne soit désengagé.
Risque
Ne pas placer cet appareil sur un chariot, un support, un trépied ou une
table instables. L’appareil pourrait tomber et blesser quelqu’un ou subir
des dommages importants. Utiliser seulement un chariot, un support,
un trépied ou une table recommandés par le fabricant ou vendus avec
le produit. Suivre les instructions du fabricant pour installer l’appareil et
utiliser les accessoires recommandés par le fabricant.
Il convient de ne pas placer sur l’appareil de sources de flammes
nues, telles que des bougies allumées.
L’appeil ne doit pas être exposé à des égouttements d’eau ou des
éclaboussures et qu’aucun objet rempli de liquide tel que des vases
ne doit être placé sur l’appareil.
Les dispositifs marqués d’une symbole “d’éclair” sont des parties
dangereuses au toucher et que les câblages extérieurs connectés à
ces dispositifs de connection extérieure doivent être effectivés par un
opérateur formé ou en utilisant des cordons déjà préparés.
Cordon d’Alimentation
Évitez d’endommager le cordon d’alimentation. N’UTILISEZ PAS
L’APPAREIL si le cordon d’alimentation est endommagé.
Service
Consultez un technicien qualifié pour l’entretien de votre appareil.
Introduction
Your new
Yorkville
A4.4
power amplifier is designed and built to provide years of trouble free performance.
The
A4.4
combines the field-proven reliability of our Audiopro amplifiers with customer requested features such as
switchable limiters, a
Mono/Stereo/Bridge
switch, and
SPEAKON™
output connectors (as well as binding posts).
The
A4.4
weighs an amazing 26 pounds, fits into two rack spaces, and reproduces music with over
4000 Watts of headroom. It will drive reactive phase shifted loads with no difficulty - even though it is fully
protected from accidental short circuits. Our design goal was to create an amplifier which would do exactly
what an amplifier should do: reproduce music with great power, complete reliability, and uncompromising
signal fidelity. We think you will agree that the
Yorkville
A4.4
does exactly that.
What Makes the A4.4 So Different?
Power supplies convert energy from AC wall sockets into voltage that the power amplifiers use to amplify
music. The
A4.4
incorporates the latest technology in power supplies; power factor corrected switch mode
power supply technology (SMPS). It reduces the weight of the
A4.4
by 40%, compared to conventional
amplifiers that use 60 Hz power transformers. Conventional amplifiers produce less than rated power when
the AC wall voltage sags below 120 volts AC. By using SMPS technology, the
A4.4
produce’s its rated
power even when the AC wall voltage drops to 90 volts! The type of switching power supply the
A4.4
uses
is called a “Power Factor Corrected.” “Power Factor Corrected” means that the
A4.4
’s power supply draws
its power more efficiently from the wall socket than a conventional amplifier. This reduces the nuisance
tripping of wall mounted circuit breakers when two amplifiers are connected to one wall socket.
1. Balanced Inputs
Either
XLR
or two–circuit
TRS (T
ip,
R
ing,
S
leeve) Stereo 1/4-
inch Phone cords may be used. Each channel’s
XLR
input is
internally paralleled with its phone input (The tip of the Channel
A Phone input is connected to pin 2 of its
XLR
input, the Ring is
connected to pin 3, and the sleeve is connected to pin 1
)
. Pin 2 is
in-phase, pin 3 is 180 degrees out-of-phase, and Pin 1 is ground.
We recommend using balanced lines for the best hum-free perfor-
mance, particularly when multiple amplifiers are used in a chain.
2. Unbalanced Inputs
Ordinary single circuit Standard 1/4-inch Phone plugs may be
used to connect unbalanced signals.
IMPORTANT NOTE:
Such plugs effectively connect the Ring terminal
to Sleeve ground, so they work correctly. However, if you use a Stereo
1/4-inch Phone plug on an unbalanced line, you MUST short the Ring
terminal to the Sleeve terminal, otherwise the sensitivity will be 6 dB
lower than is specified! (The same applies to the XLR input: To connect
an unbalanced source via the XLR input, you must connect the signal to
Pin 2 and ground BOTH Pin 1 and Pin 3).
3. Remote Referencing
You can approach balanced performance with unbalanced sources by using the
remote reference feature of the
A4.4
. Connect a balanced cable to the
A4.4
just
as you would if you were running a balanced line. At the other end, connect Pin 3
and Pin 1 together, (or connect ring to sleeve if you are using a Phone plug cable),
and plug this modified end into your unbalanced piece of equipment. This connec-
tion enables the
A4.4
’s input to look down the cable directly at the output jack of the
unbalanced equipment. Any hum voltage generated across the cable’s impedance will
be attenuated by the Common Mode Rejection of the
A4.4
.
