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2.2.3 Product Dimensions 

 

2.3 Proper Cooling Considerations 

Because the AV 25 regulates its temperature using convection cooling 
and no fans, the amplifier must be given adequate space to allow for 
proper airflow. Do not stack the amplifiers on top of each other or 
mount it in a way that other equipment will block airflow through the 
case.  

 

CAUTION: Inadequate airflow to the amplifier can cause the 
amplifier to overheat and potentially become damaged in 
the process. Be sure to provide plenty of air space to allow 
for convection cooling. 

AV Series

AV-25-2

4.35in

11.1cm

1.25in

3.2cm

1.25in

3.2cm

3.2in

8.1cm

Front

Side

2.4 Input Connections 

 
Your AV25-2 amplifier is provided with a 3-pin Phoenix connector for 
each input. This connector will accept both balanced or unbalanced 
connections, however some modifications must be made for an unbal-
anced connection. See the next two sections for instructions on con-
necting your amplifier to its input source. 
 
 

2.4.1 Balanced Connections 

 
When using a balanced input source and connector, you must ensure 
that the hot, cold, and ground pins of the connector are matched up to 
the +, -, and ground pins of the AV25-2’s Phoenix connector respec-
tively.  Diagrams have been provided for standard XLR and TRS con-
nectors. Please refer to the manual of your input source in case it does 
not follow the standard pin-out.

 

Male TRS

Input Connector

Ground

(Shield)

+

-

+

(Connector enlarged to show detail)

 

-   +      -  +

Female XLR

Input Connector

 

-   +      -  +

Summary of Contents for AV-25

Page 1: ...Owner s Manual AV 25 www stewartaudio com February 2010 AV Series AV 25 2 ...

Page 2: ...interfere with its proper ventilation For example the amplifier must not be placed on a rug bed sofa or similar surface that impedes airflow across the chassis Airflow through the ventilation openings should be unobstructed 4 This amplifier should not be used near water for example near a bathtub in a wet basement near a swimming pool etc This amplifier is intended to be operated in a controlled i...

Page 3: ...fier please take time to read this brief owner s manual and carefully follow the guidelines for connection and operation This manual provides you with the information necessary to safely in stall and operate your new AV Series amplifier in the most common scenarios If you find yourself requiring additional assistance please feel free to contact your Authorized Dealer or you may contact us di rectl...

Page 4: ...ount holes on both the top as well as the side of the unit which can be used with the AV Pole bracket available from Stewart Audio Part Number AV Pole 2 2 1 Universal Mount Installation The AV 25 also has a universal bracket available which allows the unit to be mounted against a wall or under a table Two screws are in cluded in the kit which will affix the bracket to the top or the side of the un...

Page 5: ...Input Connections Your AV25 2 amplifier is provided with a 3 pin Phoenix connector for each input This connector will accept both balanced or unbalanced connections however some modifications must be made for an unbal anced connection See the next two sections for instructions on con necting your amplifier to its input source 2 4 1 Balanced Connections When using a balanced input source and connec...

Page 6: ...ifier to the speakers Use the following table as a guideline when selecting your wire gauge Speaker leads connect by means of terminal block connectors supplied with the unit Strip speaker leads 1 4 and insert into connector ob serving proper polarity With a small flat blade screwdriver tighten the screw until the leads are held securely in place Inspect for possible shorts or broken wires Distanc...

Page 7: ...ween the amplifier and the input or output equipment Using equipment that is not capable of handling the output wattage may lead to permanent damage NOTE Stewart Audio will not be held responsible for damage to your AV 25 or connected equipment if the instructions in this manual are not followed 3 2 Controls Indicators and Connectors AV Series AV 25 2 2 SPKR 1 MUTE PWR LEVEL 2 1 ON CLIP SIG 2 INPU...

Page 8: ...muted when needed for such applications as muting during a fire alarm To do so 5 12VDC should be applied to the terminal block labeled MUTE on the rear of the AV 25 Polarity should be observed when connecting the triggering power source as the amplifier will not be muted if polarity is reversed 4 Troubleshooting Problem Power indicator does not turn on Procedure Check that the amplifier is plugged...

Page 9: ...io dealer and submitted by the original pur chaser This warranty is only valid in the country in which the amplifier was purchased 6 1 1 Eligibility Requirements Stewart Audio warrants against all malfunctions which come as a result of component or manufacturer defect The amplifier is also covered from all failures which arise during the warranty period 3 years from date of purchase that are not a...

Page 10: ...bility for damaged goods and or accessories that are sent with your unit 6 2 3 Packaging Instructions cont 1 Please write the RA number on three sides of the box Include the Stewart Audio RA number inside the box and a brief description of the problem 2 Do not ship any accessories manuals cords hardware etc with your unit These items are not needed to service your product Stewart Audio will not be...

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