Furman Sound IT-1220 - Manual

BALANCED ISOLATION
TRANSFORMERS, 10/20/30 A
Furman Sound, Inc. ● 1997 South McDowell Blvd. ● Petaluma, CA 94954 USA
Phone: (707) 763-1010 ● Fax: (707) 763-1310 ● http://www.furmansound.com
MODELS IT-1210, IT-1220, IT-1230
FEATURES
● Available in 10 Amp, 20 Amp and 30 Amp models
● Provides precisely balanced AC power for ultra-low-noise
installations
● Typically gives a 16 dB improvement in background noise
floor
● Toroidal transformer with center-tapped secondary is the
most efficient and compact design, with minimal magnetic
field leakage
● Exclusive “Soft Start” circuit prevents turn-on transients
and high inrush currents
● Faraday shield reduces electrostatic coupling between
primary and secondary
● Extreme Voltage Shutdown circuit protects against
dangerously high or low input voltages
● Microprocessor-controlled “smart” AC voltmeter monitors
line voltage, flashes alerts for marginal and extreme
conditions
● Provides basic power conditioning (spike suppression, RFI
filtering) plus gas discharge tube to dissipate spikes
● Ground fault circuit interrupter (GFCI) protection
● Models IT-1210 and IT-1220 UL/CUL listed
into sensitive lines, particularly low level and unbalanced sources.
The IT-1210, IT-1220 and IT-1230 not only dramatically
reduce the noise floor but also have been reported to noticeably
improve dynamic range and sonic clarity.
At the heart of these units is a specially wound and shielded
toroidal isolation transformer with a center-tapped secondary.
These precision transformers, in conjunction with wideband
EMI/RFI filters and output spike protection, make these units
excellent power conditioning solutions for any situation.
An IT-1210 or IT-1220 can be installed in minutes without the
need for an electrician; the IT-1230 may require some help in
choosing and wiring an appropriate supply cable. All three models
provide clean and completely safe power – there is no need to
“lift grounds” or compromise the integrity of safety ground wires to
achieve hum reduction.
Special features include an accurate, self-checking AC
voltmeter that not only measures normal voltages, but also
flashes eye-catching special pattern alerts for off-scale but not
extreme conditions (80-90 or 130-140 Volts); an Extreme Voltage
Shutdown circuit to cause a protective shutdown if the unit is
exposed to dangerous voltages (like accidental connection to 220
Volts); and Furman’s exclusive “Soft Start” circuit to prevent the
large inrush surge currents and spikes that would otherwise occur
at turn-on and turn-off with such large transformers.
The IT-1210 occupies two rack spaces (3.5" high); the IT-1220
and IT-1230 occupy three rack spaces (5.25" high).
The IT-1210 and IT-1220 rear panels provide 12 outlets, the
front panel provides two. The IT-1230 rear provides ten 20 Amp
outlets, one 30 Amp twistlock outlet and one 30 Amp twistlock
inlet. The front provides two 15 Amp outlets. All outlets are
balanced and Ground Fault Circuit Interrupter protected.
®
TEC AWARD
NOMINEE
IT
-1220: “BEST
ANCILLAR
Y
EQUIPMENT”
IT-1220 shown (IT-1210 and IT-1230 front panels are similar).
DESCRIPTION
Designed for the most critical, ultra-low-noise installations,
the IT-1210, IT-1220 and IT-1230 can supply 10, 20 or 30 Amps
of balanced AC power to recording studios, video or film
production facilities, broadcast stations, etc. These models
drastically reduce hum and buzz caused both by ground currents
from power supply filtering and by radiation from supply cables