Furman SPR20 User Manual
SPR - 20 OWNER’S MANUAL
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SPR - 20 OWNER’S MANUAL
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The SPR-20 Features
• P r ovide s an ult r a-st able 120 VA C su p ply from low o r hi gh v o ltag e so u rces
• L inea r Filt e rin g Te chno logy for u neq u ale d aud io / vid e o c l ari t y
•
Series Multi-Stage Protection provides virtually maintenance-free AC surge
suppression
• Cool running, noise free technology allows placement in critical listening environments
• Detacha ble surge suppression module for telco a nd cable / s atellite connectors
• 2 0 am p RM S ca p acit y
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Introduction
For over 30 years, Furman has pioneered the
development of AC power products for the
most demanding audio, video, and broadcast
professionals. Though the need for stable AC
power is nothing new, the SPR-20’s technology
and its unique implementation is revolutionary.
The extreme AC demands encountered in the
professional audio/video arena have required
technological developments far in excess of
typical home theater/audiophile power products.
In studios, live sound, and broadcast facilities,
breakdown is unacceptable. Equipment failure
or poor performance is costly. The same is
true of today’s home theater. Our solution
based technology, extensive engineering
expertise, and robust build quality have
answered the challenge of today’s corrupted
power lines, and led to the creation of the SPR-
20.
With today’s chaotic demands on many
municipal power facilities, AC voltage is often
reduced so that it can be stretched to fulll
excess demand. This creates a substantial
negative impact on your system’s performance.
Power ampliers and powered sub-woofers
cannot perform to their full potential. Even a
relatively modest reduction in AC voltage can
obliterate the sonic impact of an otherwise
superior system. Just as problematic are
excessively high line voltages. Excess voltage
can overheat sensitive circuits; lower the life
and reliability of projector lamps, and cause
many circuits to shut down.
With the SPR-20’s exclusive Stable Power AC
Voltage Regulation Technology, voltage-starved
power ampliers and powered sub-woofers
perform at their full potential. With the SPR-
20, home theaters are supplied with constant,
virtually unwavering AC voltage. This assures
trouble-free service for any environment
suffering from unstable power.
The SPR-20 generates virtually no heat, and
produces none of the mechanical noise typical
in inferior AC voltage regulators. Further,
our zero-crossing solid state technology
provides virtually unlimited peak current
delivery, avoiding the current limiting found in
AC regulators that convert AC power into DC,
then synthesizing an AC output signal.
In addition to unstable voltage, today’s AC
lines are plagued with RF and EMI noise.
When connecting sensitive equipment to your
home’s power outlet, AC noise couples into
your system’s critical components. This AC
noise masks low level signals and cripples
performance. This low level content is critical
because it relays the crucial harmonics and
ambience in audio, as well as the depth and
clarity in video. With Furman’s exclusive Linear
Filtering Technology, televisions, projectors,
DVD players, and processors are fed linearly-
ltered AC power. This dramatically reduces
noise, ensuring consistent peak operation of
your critical components regardless of load
conditions or the time of the day.
Another critical feature is our exclusive
Series Multi-Stage Protection. This virtually
maintenance-free surge suppression assures
the highest level of AC protection possible,
without sacricing itself when the offending
surge is severe – no damaged equipment, no
service calls, no down time. Further, our digital
AC input voltage, output voltage, and current
meters allow precise measurements of both the
AC line and the current load. These meters are
a valuable asset when monitoring systems that
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are connected to today’s potentially poor power
grids, or the meters may be dimmed when
monitoring is not required.
When employing the SPR-20, you will notice
far clearer, stunningly focused sound and visual
images from your system. Video presentation
will be crisp and colors true with greater gray
and black scale denition, as well as noticeably
improved depth and clarity. When installed with
the IT-Reference 15 or 20, home theaters will
reap the dual benets of Furman’s Stable Power
and Discrete Symmetrical AC Filtering, ensuring
performance without compromise – without peer.
Installation:
Unpacking
Before unpacking your unit, inspect the carton
for any obvious severe damage to the box and
internal protective materials. If internal damage
is likely, contact the carrier who delivered the
unit before proceeding with unpacking. If, after
unpacking, shipping damage is evident, contact
the carrier. Save all shipping and packing
materials. You may need them if you should
ever have to return the unit to the factory for
servicing.
The box should contain the SPR-20 unit,
detachable AC cord, rack mount kit, owner’s
manual, and warranty registration card. If
anything is missing, please contact Furman
Customer Service. Fill out and return your
warranty registration card. Registration
is recommended because it can be used
to establish whether the unit is within the
warranty period should your original ownership
documents be lost, and it assists us in
informing you about upgrades or other vital
information.
Safety Information - Warnings
Please read and observe all of the safety and
operating instructions before the SPR-20 is
operated. Retain these instructions for future
reference.
• Do not disassemble or modify in any way.
No user-serviceable parts inside
• Keep away from moisture and avoid
excessive humidity
• Do not allow liquids or foreign objects to
enter the unit
The SPR-20 should be serviced by qualied
service personnel when:
• The power supply cord or plug has been
frayed or cut.
• Objects have fallen or liquid has spilled
into the unit.
• The SPR-20 has been exposed to rain or
other moisture.
• The SPR-20 does not appear to operate
normally, or exhibits a marked change
in performance.
• The SPR-20 has been dropped, or the
enclosure damaged.
The SPR-20 requires that a safety ground be
present for proper operation. Any attempt to
operate the SPR-20 without a safety ground
is considered improper operation and will
invalidate the warranty.
Power Source
The power source to which the SPR-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 ampliers that require more than
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