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AR-15 VOLTAGE REGULATOR / POWER CONDITIONER
accidental connections to 208 or 240 VAC, by
shutting off the incoming power until the over
voltage condition is corrected.
LiFT (Linear Filtering Technology)
Unfortunately, traditional AC filter - condition-
ers have been designed for unrealistic labora-
tory conditions. Prior technologies, whether
multiple pole filter or conventional series
mode, could actually harm audio and video
performance more than they help, due to the
resonant peaking of their antiquated, non-lin-
ear designs. Under certain conditions, these
designs can actually add more than 10 dB of
noise to the incoming AC line! Furman’s SMP+
with LiFT takes another approach, ensuring
optimal performance through linear filtering
and no leakage to ground. With this exclusive
filtration technology, all connected equipment
will be free of noise and contamination and will
operate at optimum performance levels.
Extreme Voltage Shutdown Indicator
This LED is normally off. It monitors a hazard
common in the entertainment industry: wiring
faults – for example, accidental connection
to 220VAC where 120VAC is expected, or an
open neutral from a 208 or 240VAC feed. The
Series II SMP+ circuit senses voltages that
are so high that operation would be impossible
and shuts the power down before damage
can occur. Upon initially applying power to
these units, the Extreme Voltage indicator
LED will light if the input voltage is above the
extreme voltage cutoff, and power will not be
applied to the unit’s outlets. If the unit has been
operating with an acceptable input voltage
and subsequently that voltage exceeds 145-
150V, it will shut off power to the outlet and the
Extreme Voltage LED will light.
NOTE: If the mains power is above the high
cutoff voltage and has caused the unit to
remove power from its outlets, it cannot restore
power without the operator manually turning
the unit off, then on again. Avoid turning the
unit back on, without first checking the source
of the problem, and perhaps changing the AC
source.
Protection OK Indicator
Although the Furman SMP+ circuit assures
virtually protection from transient voltage
spikes and surges, nature has a way of
occasionally creating electrical forces that are
beyond the capabilities of any TVSS device to
absorb without some degree of damage. In
the rare instance that this occurs, the green
“Protection OK” LED indicator located on your
front panel will dim. If this happens some level
of protection from voltage surges will remain,
but the Furman’s clamping voltage rating will
be compromised. The unit must be returned
to Furman Sound, or an authorized Furman
Service center for repair.
FUSES AND CIRCUIT BREAKERS
There is one fuse and one circuit breaker in the
AR-Series. In the event that the unit appears to
be completely dead (neither the Power switch
nor any LED’s light up), unplug the power cord
and the load and check the breaker. If the cir-
cuit breaker is tripped, a white button will pop
up. Push it back in to reset it. The purposes of
these circuit protection devices are:
1. A fast-blow 15 amp circuit breaker is acces-
sible at the rear panel without removing the
unit from the rack. This breaker will trip if the
unit’s 15 amp capacity is exceeded at any
time.
2. A fast-blow 1/4 amp fuse is located inside
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