Art SLA-2 User Manual page 13

MONO BRIDGE OPERATION
Be sure the amp is shut off. Press the Stereo/Mono switch (on the
back) to the "in" position. Connect an input signal to channel one.
Connect your speaker across the two red output binding posts on the
rear of your amplifier. Turn your equipment on – your amplifier should
be the last piece you turn on (be sure its volume is turned down). Apply
an input signal to your amplifier. Use channel one's attenuator to adjust
your amplifier output level.
PROTECTION
The SLA-2's output circuitry is fully protected from short circuits. An
ultrasonic network decouples RF from the output and helps keep the
amplifier stable with reactive loads.
The SLA-2's heatsinks do most of the work in getting heat away from
the amplifier, in normal studio operation. A very quiet, rear mounted
variable-speed fan provides extra cooling of the amplifiers internal
circuitry as needed. If, in the unlikely event the heatsink should reach
194 degrees Fahrenheit, the amplifier will mute, until it cools down.
The SLA-2 is fully protected from shorts, opens, over-current, and
over-voltage. A relay disconnects the outputs under any fault
conditions and automatically returns to normal operation once the fault
is removed.
The amplifier is stable into loads as low as 2 ohms (stereo mode), and
4 ohms (bridged mono mode).
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