AV25-2 User Manual Rev A
Page 7
Table of Contents
Top
6
Rear Panel
1.
Speaker Output Connectors
– 3.5mm Eurostyle connections to low impedance speakers (4/8Ω).
2.
Contact Closure Mute connectors
– 3.5mm Eurostyle mute connector. Short terminals to mute;
open to unmute.
3.
48VDC Power Conector
– Connect 48VDC output from in-line power supply shipped with unit.
There is no on/off switch; the amplifier is on whenever the power is applied.
Stewart Audio
recommends connecting the power to the amplifier
before
the in-line power supply is plugged
into the AC receptacle.
4.
Power Indicator
– This blue LED illuminates when DC power is applied. Note that this will dim
when the amplifier is in sleep mode (approximately 5 minutes with no input signal on either
channel).
5.
Clip Indicators
– These red LEDs illuminate when an excessive input signal levels are applied.
Reduce signal level to avoid distortion.
6.
Signal Present Indicator
– The green LED illuminates to indicate an input signal is present on
either channel.
7.
Input Connectors
– Connect audio sources via these 3.5mm Eurostyle connectors.
8.
Channel 1 Level Control
– Turn fully clockwise for maximum output on output 1. Note that the
input sensitivity of the AV25-2 is 0.5V
rms
. Do not overdrive the amplifier.
9.
Channel 2 Level Control
– Turn fully clockwise for maximum output on output 2.
In normal operation, the DC voltage on the speaker output connectors is approximately 24VDC.
Do not connect any speaker output to ground or to the amplifier chassis. Do not connect
speakers across speaker outputs. (Bridge mode is not supported.)
6.1
Operation
6.1.1
Input Connections
Your AV25-2 amplifier is provided with a 3-pin Phoenix connector for each input. This connector will
accept balanced or unbalanced 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.
③
①
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⑥
⑦
⑧
⑨
