BALANCED ISOLATION TRANSFORMERS, 10/20/30 A 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 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 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 IT-1220 shown (IT-1210 and IT-1230 front panels are similar). 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.