3 proper cooling considerations, 4 input connections – Stewart Audio AV25-2 RS232 User Manual
Page 5

2.2.3 Product Dimensions
2.3 Proper Cooling Considerations
Because the AV25-2-RS232 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 oth-
er 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. 
AV25-2-RS232
4.25in
10.8cm
1.25in
3.2cm
1.25in
3.2cm
3.2in
8.1cm
Front
Side
2.4 Input Connections
 
Your AV25-2-RS232 amplifier is provided with a 3-pin Phoenix connect-
or for each input. This connector will accept both balanced or unbal-
anced connections, however some modifications must be made for an 
unbalanced connection. See the next two sections for instructions on 
connecting 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-RS232’s Phoenix connector 
respectively. Diagrams have been provided for standard XLR and TRS 
connectors. 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
- + - +
