Furman Sound SPR-20i User Manual
SPR-20i
STABL E POW ER VOLTAGE R E GU L ATOR / P OW E R CO NDI T IO N ER
CONDITIONNEUR D'A LIMENTATION ET RÉGULATEUR DE TENSION STABLE
OWN ER’S M A NU A L
GUI DE D E L’ U TIL IS AT EU R
ENGLISH
SPR-20
ST ABL E PO WER V OLTAG E RE GUL ATO R / PO WER C ON DI TIO NE R
CONDITIONNEUR D'ALIMENTATION ET RÉGULATEUR DE TENSION STABLE
ESTABLE REGULADOR DE VOLTAJE / ACONDICIONADOR DE POTENCIA
Page 4
SPR-20i Owner’s Manual
SPR-20i Guide de l’utilisateur
FRANÇAIS
Page 10
Para esPañOl, visita www.furMansOund.cOM
ESPAÑOL
www.FurmanSound.com
All content ©2006 Furman Sound, LLC. All Rights Reserved. Printed in China.
SPR-20i Owner’s Manual
SPR-20i Features
• Provides an ultra-stable 120 VAC supply from excessively low or high AC voltage sources
• Linear Filtering Technology (LiFT) for unequaled audio / video clarity
• Series Multi-Stage Protection (SMP) provides virtually maintenance-free AC surge suppression
• Cool running, noise-free technology allows placement in any critical listening environment
• Three HD-ready bidirectional coaxial surge suppression modules
• 20 amp RMS capacity with 60 amp pk capacity provides power ampliers the current they need without the current
compression typical of most AC regulators
Introduction
For over 33 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-20i’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 audio/video, 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-20i.
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
subwoofers 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-20i’s exclusive Stable Power AC Voltage Regulation Technology, voltage-starved power ampliers and powered
subwoofers perform at their full potential. With the SPR-20i, home theaters are supplied with constant, virtually unwavering AC
voltage. This assures trouble-free service for any environment suering from unstable power.
The SPR-20i 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 oending 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 are connected to today’s potentially poor power grids, or the meters may be dimmed when monitoring is not required.
When employing the SPR-20i, 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 Furman’s IT-Reference 20, home theaters will reap the dual benets of Furman’s Stable Power and
Discrete Symmetrical AC Filtering, ensuring performance without compromise – without peer.
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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-20i 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-20i 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-20i 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-20i has been exposed to rain or other moisture.
• The SPR-20i does not appear to operate normally, or exhibits a marked change in performance.
• The SPR-20i has been dropped, or the enclosure damaged.
FRANÇAIS ENGLISH ESPAÑOL
The SPR-20i requires that a safety ground be present for proper operation. Any attempt to operate the SPR-20i without a
safety ground is considered improper operation and will invalidate the warranty.
Power Source
The power source to which the SPR-20i 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 modest power demands, a circuit breaker with
a rating of at least 20 Amps is essential for optimum performance. If other electrical loads are used on this same AC line, and
the continuous load from your equipment is in excess of 10 Amps, we recommend a 30 Amp circuit breaker wired with #10
gauge wire. For installations which must comply with NEC codes, a dedicated 20 Amp circuit is the minimum requirement.
If in doubt, consult your local electrician. In rare instances, two SPR-20i may be required for the most ambitious 5.1 and 7.1
home theater systems with continuous current draw in excess of 20 Amps (consult your sales professional, or Furman Sound
technical assistance).
Placement
The SPR-20i is manufactured with four rubber feet for placement on any table, cabinet, shelf, or oor. These rubber feet may
be easily removed with a standard Philips screw driver when rack mounting adjacent to other components. Because of the
SPR-20i’s internal shielding, placement or proximity to other components is not critical, and the SPR-20i does not produce any
appreciable heat under standard use. The SPR-20i may also be rack mounted in a standard 19” rack by attaching the SPR-20i
rack ears. These rack ears (contained within the plastic rack kit package) mount ush with the back portion of the SPR-20i’s
front panel. They are attached to the chassis by removing the (2) countersunk screws on each forward-side of the chassis
top cover. Each rack ear is installed with (3) pan-head Philips screws contained within the SPR-20i rack mounting kit. The
third screw used for each rack ear is for the center hole, located towards the rear and aids in stabilizing the unit when rack
mounted.
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SPR-20i Owner’s Manual
Connection
AC Cable Routing
Once the SPR-20i is placed, its AC cord’s female end must be plugged into the male IEC connector located on the lower left hand
side of the rear panel (when facing the rear panel). Next the male Edison plug must be connected to an appropriate socket (see
current rating recommendation above).
Connecting Components to the Digital - Video Component AC Outlet Banks
The SPR-20i’s four “Digital - Video Component AC Outlets” should be employed for critical video components such as DVD
players, projectors, Plasma, or LCD video screens. When employing the SPR-20i for a 2-channel audio system, a pre-amplier and
or CD player would be ideally suited for these outlets.
Connecting Components to the Linear Filtering Power Banks
The SPR-20i’s eight rear panel, and one front panel, Linear Filtering Power Outlets should be employed for any component not
connected to the four “Video Components” outlets. These outlets still posses incredible AC noise ltering to maximize system
performance.
Suggested AC Connection
AC Cord
Telco
Connectors
(x2)
Powered
Subwoofer
Cable / Satellite
Protectors (x3)
2 - 7 Channel
Amplier
Audio
Pre-Amplier
Turntable
CD Player
Cable/Satellite
Receiver
VCR/DVR DVD/ HD-DVD/
LCD/Plasma Monitor
or Video Projector
Blu-Ray Player
Soft Start - Continuous Use and Break-In Time
When power is rst applied to the SPR-20i, (the front panel breaker- power toggle must be switched to the “on” position) the
Soft Start feature is activated. There is an audible “clack” when the SPR-20i is rst turned on or o. This sound is produced by
the Soft Start circuit’s 30 Amp relay engaging or disengaging. There is virtually nothing in the SPR-20i’s construction, design, or
componentry to wear over the life time of the product, and there is no power draw from your electric service meter aside from
the LED power indicator, and relay circuits. For this reason the SPR-20i may be left with its power engaged permanently at a cost
of pennies per month. This is an added benet, as many audio/videophiles nd performance improves signicantly when leaving
low-powered components permanently charged (turned on). In fact, this is true of the SPR-20i. Though it will function awlessly
right from its shipping carton, the performance of its circuit parts will improve after approximately two weeks of continuous use
or “break-in.”
AC Transient Voltage Surge Suppression and Extreme Voltage Shutdown
Extreme Voltage Shutdown Indicator
This LED is normally o. It monitors AC wiring faults – for example, accidental connection to an open neutral from a 208 or
240VAC feed (this is a common occurrence if the 15 Amp outlet source is not a dedicated line, but instead has been wired with
a daisy-chained neutral from a homes breaker box). The Extreme Voltage Shutdown (EVS) circuit senses voltages that are so
high that operation would be impossible and shuts the power down before damage can occur. Upon initially applying power
to these units, the Extreme Voltage indicator LED will light if the input voltage is above the extreme voltage cuto, and power
will not be applied to the unit’s outlets. If the unit has been operating with an acceptable input voltage and subsequently that
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