IT-REFERENCE 20 OWNER’S MANUAL
20 is connected should be adequate for use
at 20 Amps. Though the system may function
with a 15 Amp panel circuit breaker, nuisance
circuit breaker tripping could result at your
service panel. If your system includes multi-
channel audio power amplifi ers that require
more than modest power demands, a circuit
breaker with a rating of at least 20 Amps is
essential for optimum performance. If other
electrical loads are used on this same AC line,
and the continuous load from your equipment
is in excess of 10 Amps, we recommend a
30 Amp circuit breaker wired with #10 gauge
wire. For installations which must comply with
NEC codes, a dedicated 20 Amp circuit is the
minimum requirement. If in doubt, consult your
local electrician. In rare instances, two IT-
Reference 20’s may be required for the most
ambitious 5.1 and 7.1 Home theater systems
with continuous current draw in excess of
20 Amps (consult your sales professional, or
Furman Sound technical assistance).
Placement
The IT-Reference 20 is manufactured with
four rubber feet for placement on any table,
cabinet, shelf, or fl oor capable of supporting
its 83lbs weight. These rubber feet may be
easily removed with a standard Philips screw
driver when rack mounting adjacent to other
components. Because of the IT-Reference
20’s internal shielding, placement or proximity
to other components is not critical, and
the IT-Reference 20 does not produce any
appreciable heat under standard use. The
IT- Reference 20 may also be rack mounted
in a standard 19” rack by attaching the IT-
Reference 20 rack ears. These rack ears
(contained within the plastic rack kit package)
mount fl ush with the back portion of the IT-
Reference 20’s front panel. They are attached
to the chassis by removing the (3) countersunk
screws on each forward-side of the chassis
top cover. Each rack ear is installed with
pan-head Philips screws contained within the
IT-Reference 20 rack mounting kit. Due to
the weight of the IT-Reference 20 (83 lbs.), it
is recommended that placement be at or near
the bottom of your rack when choosing this
mounting option.
Connection:
AC Cable Routing
Once the IT-Reference 20 is placed, its AC
cord’s female end must be plugged into the
male IEC connector located on the lower left
hand side of the rear panel (when facing the
rear panel). Next the male Edison plug must
be connected to an appropriate socket (see
current rating recommendation above). This
AC cord will carry substantial unbalanced AC
current, so it should be dressed away from
critical signal-carrying cables, or at the very
least, cross them at a 90 degree angle. The
same is true of the power amplifi er AC cords
when plugged into the IT- Reference 20’s “High
Current - Amplifi er Power” AC fi ltered outputs.
All other components plugged into “Discrete
Symmetrical Power” outlets (A) through (D)
have symmetrical balanced AC current and
will radiate virtually no fi eld; as a result of this
technology, their placement is not critical.
Connecting Components to the
Symmetrical Power Banks
The IT-Reference 20’s “Symmetrical
Power Outlets” should be employed for all
components other than receivers, power
amplifi ers, powered subwoofers, or powered
loudspeakers. Each “Discrete” bank (A)
through (D) contains two parallel outputs, that
are symmetrically balanced, fi ltered, and totally
isolated from adjacent output banks or the
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