5
S R 2 - 1 2 5 T W O - C H A N N E L A M P L I F I E R I N S T R U C T I O N M A N U A L
Front Panel
Power Switch
The power switch turns the amplifier on and off.
When the power switch is lit solid white, the amplifier has power, is
turned ON and ready to operate.
When the power switch is slightly dimmed the amplifier is in
standby mode.
When the power switch is blinking white, the amplifier power supply
is in thermal protection. The channel LEDs will also light red when
the power supply is in thermal protect mode.
NOTE: Upon initial power up there will be an approximately 9-12
second boot up cycle. This is normal.
Input/Output Lights
When each channel is active, the LED will light green as long as a
signal is present.
When the LED blinks red, this is an indication that the channel is
being overdriven.
When the LED lights are solid red this is an indication the amplifier
is in protect mode. While in protect mode the LED lights will
periodically light green to retest the output to determine if the short
has been removed. Protect mode could be caused by a short in the
wire, overheating of the amplifier or possibly an internal problem
with the amplifier.
NOTE: WHEN ANY OF THE LEDS ARE LIT RED TURN THE
AMPLIFIER OFF IMMEDIATELY. DETERMINE THE CAUSE OF THE
PROBLEM BEFORE TURNING THE AMPLIFIER ON.
Volume Level Control
Each channel on the amplifier has front panel recessed volume
controls that will adjust the output and turn on volume. The amplifier
must be powered on to make these adjustments.
Rear Panel
Inputs
The SR 2-125 amplifier has analog, coax and toslink LINE INPUTS
and loop OUTPUTS.
The analog loop outputs are non buffered. The maximum number
of amplifiers that can be looped together will depend on the output
capability of your source component. The digital outputs are
buffered and can support multiple amplifiers. Only one output can
be used at a time.
Speaker Connections
The removable block connectors used on the SR 2-125 amplifiers
will accept up to 12 gauge wire.
Follow the connection layout on the rear panel of the amplifier.
Make sure no bare wires come in contact with the amplifier chassis.
AC Fuse Holder
To replace the fuse, unplug the power cord from the Power Cord
Connector and use a screwdriver to remove the fuse holder.
SR 2-125 - 5 amp AC (T5-AL)
CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE,
REPLACE THE FUSE WITH ONLY THE SAME TYPE AND RATING.
Power Cord
The SR 2-125 amplifiers feature removable IEC power connectors.
Plug the female end of the power cord into the Power Cord
Connector on the amplifier rear panel and plug the male end into a
grounded wall socket.
DO NOT plug the amplifier’s power cord into a convenience outlet
on any other audio or video component. If you need to use an
extension cord, use only a heavy duty (14-GAUGE OR LARGER)
extension cord to avoid starving the amplifier of the current
necessary for full operation.
FIGURE 4: SR 2-125 AMPLIFIER FRONT PANEL VIEW
FIGURE 5: SR 2-125 AMPLIFIER REAR PANEL VIEW
