8
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
Protection Circuitry and LEDs
The SR 2-125 amplifiers have a multi-stage protection system to
prevent damage to your amplifier and speakers.
SR 2-125 Amplifier Channel Protection
If a channel encounters a short-circuit or an extremely low impedance
this will cause the affected channel outputs to automatically mute.
The output of the affected channel will remain muted until the fault
has been corrected. Only the affected channels output will mute, all
other channels will continue to operate normally.
SR 2-125 Amplifier Channel Protection Indication
On the front panel of the SR 2-125 amplifiers are dual color LEDs
that illuminate to indicate the current operating status of each
amplifier channel.
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.
IMPORTANT: ALLOWING THE AMPLIFIER TO OPERATE WITH
ONE OR MORE CHANNELS IN PROTECT MODE FOR AN
EXTENDED PERIOD OF TIME CAN DAMAGE THE AMPLIFIER.
SR 2-125 Amplifier Power Supply Protection
The amplifier also has protection for the power supply. If the power
supply heat sink temperature exceeds the design maximum the
protection circuit will activate disconnecting all channel outputs. This
is indicated by a blinking light on the front panel power switch.
IMPORTANT: ANY TIME THE PROTECTION CIRCUITS ARE
TRIGGERED, UNPLUG THE AMPLIFIER’S POWER CORD FROM
THE WALL OUTLET BEFORE TROUBLESHOOTING.
Rack Ear Installation SR 2-125
The SR 2-125 amplifier ships with two long rack ears for when the
amplifier is to be used alone in a 1U space. Unscrew the four Phillips
head screws (M4 x 0.7 pitch x 10mm long) found on each side of
the left and right forward section of amplifier. Use these screws to
connect the included rack ears to the amplifier (see Figure 12).
FIGURE 12: RACK EAR INSTALLATION SR 2-125
SIDE VIEW RIGHT
FRONT VIEW
Amplifier Stacking
The SR 2-125 amplifier is capable of being directly stacked with
the feet removed (see Figure 14) for use in low to moderate output
applications. For high-output applications, it is recommended to
leave at least 1U space between amplifiers for increased ventilation.
It is not recommended to stack more than three amplifiers high
without spacing.
Shelf Mounting
If shelf mounting, attach the four included feet by screwing them
into the threaded openings, no tool is required.
To place two SR 2-125 amplifiers in a single rack unit order:
Rack Mount Bracket for SR 2-125 SKU# 93098 (see Figure 13).
FIGURE 14: STACKED CONFIGURATION (3) SR 2-125
FIGURE 13: RACK MOUNT BRACKET FOR (2) SR 2-125
FRONT VIEW
FRONT VIEW
