I n t r o d u c t i o n
Thank you for your purchase of a Furman IT- 20 II 20 amp Balanced Power Conditioner, and congratulations on your choice. This specially wound and shielded toroidal isolation transformer is designed specifically to reduce hum pickup by sensitive equipment when ultra- low-noise is a must.
D e s c r i p t i o n
Designed for the most critical, ultra-low noise installations, the IT-20 II can supply 20 amps of Balanced AC power for recording studios, broadcast stations, or video production facilities. To understand the incredible need for clean noise-free AC power, it’s important to note that today’s sophisticated studio equipment features tremendous dynamic range. Most of the signal content that defines high resolution such as harmonics, instrument timbre, high frequency extension, spatial cues, and fast transient
attacks in audio are inherently low in signal
level. Further, when AC noise is induced into
audio processors, pre-amplifiers, microphones, powered monitors, computers, and mixing consoles, the all important low level signals are distorted or masked. Once signals are masked there is no way to retrieve the lost content. Advanced AC filtering is critical when audio or video resolution is at stake. With Furman’s IT-20 II, for the first time you will hear audio content and see video images as they were meant to be
-pristine. Add to this our SMP+ non-sacrificial surge suppression, E.V.S. protection, Linear
Filtering Technology (LiFT), and laboratory grade digital voltmeter and you will be assured that AC noise and surges are a thing of the past.
I n s ta l l at i o n
The power source to which the IT-20 II is connected must be adequate for use at 20 amps. We recommend a 30 amp circuit, wired with 10 gauge wiring, if continuous operation near 20 amps is anticipated. A dedicated (nothing else connected) 20 amp circuit is the minimum acceptable to comply with NEC requirements. Consult a qualified electrician if in doubt. The IT- 20 II is designed for mounting in a standard 19 inch equipment rack. Because of its weight, the best position for it is the bottom slot of the rack. Its toroidal transformer minimizes magnetic leakage, but nevertheless, due to its high capacity, it will radiate an appreciable magnetic field. Therefore, we recommend that it not be positioned adjacent to sensitive, low level signal processors, especially mic preamps, mixers, tape recorders, etc. Power amps may be more suitable “rack neighbors.”
The maximum benefit is derived from balanced power when it powers ALL equipment in an installation. Therefore, try to position the IT-20
IIin a central location so its power can be easily distributed everywhere it’s needed. If the total power consumption of all equipment exceeds 20 amps at 120 volts, delete high level or mechanical devices first (such as power amps, motors). If possible, physically isolate any equipment that has to be powered with conventional power through a different circuit, and route their AC cords away from all other cabling. The balanced power produced by the IT-20 II is restricted to use with electronic equipment only. Balanced power may not be used for lighting equipment, and access must be limited to use by qualified personnel only.
If you are installing the IT-20 II in a rack that has rear as well as front mounting rails, you may wish to order adjustable rear rack ears from Furman. These allow the IT-20 II to be securely attached in both the front and back. Order model RRM-2.
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