or less, excluding the power amplifiers) utilize one “Discrete” bank
per component. This will maximize performance by eliminating in-
ter-component AC noise contamination entirely! For systems uti-
lizing more componentry, high performance will still be achieved
with careful routing of component AC cords to the IT-Reference’s
four “Discrete” power banks. We recommend separating digital pro-
cessors, DVD’s, and CD transports from pre-amplifiers, tuners, and
tape machines. Further, video monitors should ideally be sepa-
rated from audio components.
Most audiophile and premium audio/video systems will have com-
bined
continuous
current demands far below 10 Amps. It is rare, in
fact, for relatively high current drawing units such as power amplifi-
ers to draw as much as 5 Amps continuously. However, for the
ultimate in performance, it is vital that an AC filter posses extraordi-
narily low impedance, and possess the capability to pass peak
current demands
far
in excess of the RMS (continuous) current rat-
ing. The IT-Reference was designed to
more than meet this de-
mand
. Additionally, our Power Correction Circuitry effectively cre-
ates a current reserve in excess of 8 Amps that is
cleaner and faster
than a dedicated line from your local power station. This benefits
audio and video performance dramatically.
When power correction technology is employed with even the
most sophisticated circuit breakers, it effectively adds to the
per-
ceived
current load. Though the IT-Reference was designed for
steady 20 Amp operation, and peak current demands many times
that, it is recommended that the total
continuous
current draw be
limited to 1500 Watts per IT-Reference employed. This is far in
excess of typical home demands. If you are unsure of your system’s
current draw, consult your Furman dealer or Furman service rep-
resentative. The total continuous current draw of most electronic
components is typically listed in Watts by their AC input cord or AC
connector. Watts ratings are simply added to determine the total
system RMS current draw. It should also be noted that the IT-
Reference’s correction circuitry has no actual effect on the power
drawn from your utilities’ power meter. The IT-Reference draws a
mere 8.5 Watts independent of other components.
Soft Start and Continuous Use
When power is first applied to the IT-Reference, the Soft Start
feature is activated. The extraordinarily low-impedance of the IT-
Reference’s proprietary transformer can draw as much as 200 Amps
for the first ¼ second power is applied. This creates a system ca-
pable of incredible instantaneous power demands without a trace
of the typical dynamic and transient compression common in many
other, inferior designs. Still, the circuit breakers in your service panel
could nuisance trip with such a
large toroid transformer when power
is applied. Furman’s Soft Start circuit eliminates this potential in-
convenience by absorbing the initial current surge, then bypassing
its circuitry within two seconds of energizing the IT-Reference. There
is an audible “clack” when the IT-Reference is first turned on or off.
This sound is produced by the Soft Start circuit’s massive 25 Amp
relay engaging or disengaging. It is best to avoid re-energizing the
IT-Reference from
turn-off mode
until the “clack” sound has occurred
(typically within two seconds).
There is nothing in the IT-Reference’s construction, design, or
componentry to wear over the life time of the product, and there is
no power draw from your electric service meter aside from the LED
power indicator, relay, and GFCI protection circuit. For this reason
the IT-Reference may be left with its power engaged permanently
at a cost of pennies per month. This is an added benefit, as many
audio/videophiles find performance improves significantly when
leaving low-powered components permanently charged (turned on).
Ground Fault Interrupter (GFCI)
The IT- Reference’s “Discrete Symmetrical Filtered AC outlets”
incorporate a balanced AC power output, whereby both the neutral
and positive leads of the AC cable run at 60 Volts AC in opposing
polarity, referenced to ground (0 Volts AC). This is but one of the IT-
Reference’s advantages over other AC-filter/protection designs.
Though virtually all domestically produced electronic equipment is
designed to detect electrical shorts and other potentially danger-
ous equipment problems in the positive lead referenced to its ground,
Suggested AC Connection: Example 2
SURROUND-SOUND
PROCESSOR
AUDIO PRE-
AMPLIFIER
MONOBLOCK
AMPLIFIER
MONOBLOCK
AMPLIFIER
V.C.R.
D.V.D.
POWERED
SUBWOOFER
VIDEO MONITOR
COMPACT DISC
TRANSPORT
DIGITAL/ANALOG
CONVERTER
