Furman Sound IT-20 II - Manual (Page 3)

IT-20 II - Owner’s Manual
- -
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 0 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
II in 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.