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AR-15 ii
AC Line VoLtAge ReguLAtoR
And
poweR ConditioneR
Voltage
RegulatoRs
aR-15 II Voltage RegulatoR / poweR condItIoneR
Congratulations on your purchase of a saFety InFoRmatIon
to obtain best results from your Furman AR-15 ii
Furman AR-15 II AC Line Voltage Regula- please be sure to read this manual carefully.
tor / Power Conditioner. The AR-Series wARning: to reduce the risk of electrical
shock, do not expose this equipment to rain or
regulators are designed specifically for moisture. dangerous high voltages are present
inside the enclosure. do not remove the cov-
any audio, video, or computer rackmount ers. there are no user serviceable parts inside.
Refer servicing to qualified personnel only.
system requiring clean, filtered, and regu-
lated AC power for optimum operation.
ImpoRtant saFety
aR-15 II FeatuRes InstRuctIons
• Provides nine regulated, conditioned AC pLeAse ReAd pRioR to instALLAtion
outlets—eight on the rear panel and one on 1. please read and observe all of the safety and
the front operating instructions before the AR-15 ii is
• Series Multi-Stage Protection Plus operated. Retain these instructions for future
(SMP+) with extreme voltage shutdown reference.
(EVS) 2. the AR-15 ii should not be used near water
• LiFT (Linear Filtering Technology) with — for example, near a bathtub, kitchen sink, in
zero ground contamination a wet basement, near a swimming pool, etc.
• BNC connector on the rear panel allows 3. do not place the AR-15 ii near heat sources
you to attach any standard (12VAC 0.5 such as radiators, heat registers, stoves, or
amp) gooseneck lamp to illuminate the other appliances that produce heat.
rear of your rack
4. Route the power cord and other cables so
• Extreme Voltage Shutdown indicator LED that they are not likely to be walked on,
tripped over, or stressed. pay particular
• Output In Regulation indicator attention to condition of cords and cables
• Ten-LED bargraph input voltmeter at plugs, and the point where they exit from
the AR-15 II. To prevent risk of fire or injury,
• Fast-acting user-accessible circuit breaker damaged cords and cables should be re-
protects against overload or shorts placed immediately.
• Very low stray magnetic field leakage 5. Clean the AR-15 ii with a damp cloth only. do
• Input capacity is 15 A; output capacity is 12 not use solvents or abrasive cleaners. never
pour any liquid on or into the unit.
to 15 A
6. when left unused for a long period of time,
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aR-15 II Voltage RegulatoR / poweR condItIoneR
the power cord of the AR-15 ii should be voltage protects equipment and allows optimal
unplugged from the outlet. performance. see graphs on the back page.
7. The AR-15 II should be serviced by qualified the AR-15 ii has eight outlets on the rear
service personnel when: panel, and one convenience outlet on the front
a. the power supply cord or the plug has panel. All are functionally interchangeable. the
been frayed, kinked, or cut. outlets are regulated, surge-suppressed, and
b. Objects have fallen or liquid has spilled linearly filtered, making the unit a full-function
into the unit. power conditioner. the AR-15 ii has no con-
c. the AR-15 ii has been exposed to rain or trols except an on-off switch and the switch for
other moisture. the optional rear rack light.
d. the AR-15 ii does not appear to operate
normally or exhibits a marked change in Note: The AR-15 II is for use with AC voltage
performance. only. DC voltages should never be applied to
e. the AR-15 ii has been dropped, or the them. Also, it does not change or regulate line
enclosure damaged. frequency. The output frequency will always be
the same as the incoming frequency.
8. the AR-15 ii requires that a safety ground be
present for proper operation. Any attempt to
operate the AR-15 ii without a safety ground
smp+ (series multi-stage protection
is considered improper operation and could plus)
invalidate the warranty. traditional surge suppression rely on circuits
9. there are no user serviceable parts in the that “sacrifice” themselves when exposed to
AR-15 II. Refer servicing to qualified service multiple transient voltage spikes, requiring the
personnel only. dismantling of your system, and repair of your
surge suppressor. not so with sMp+. with
Voltage Regulation Furman’s sMp+, damaging transient voltages
are safely absorbed, clamped, and dissipated.
Furman Voltage Regulators are intended to No sacrificed parts, no service calls, no down
protect sensitive electronic equipment from time.
problems caused by AC line voltage irregu-
larities—brownouts or overvoltages that can unique to Furman’s sMp+ is its unparalleled
cause audio tonal changes, digital equipment clamping voltage. while other designs offer
malfunction (such as loss of Midi programs or clamping voltages that are well above 330 Vpk,
other data), or, in extreme cases, permanent Furman’s sMp+ clamps at 188 Vpk, (133 VAC
damage. they accept input voltages over a RMs). this unprecedented level of protection
wide AC voltage range and convert them to a is only available with Furman’s sMp+ technol-
steady, stable output at the desired standard ogy. Additionally, Furman’s trusted over-volt-
voltage, plus or minus five volts. Voltages ap- age circuitry protects against all too frequent
proximately ±10% beyond that range may be accidental connections to 208 or 240 VAC, by
converted to usable levels, depending on the shutting off the incoming power until the over
requirements of the equipment. this stable voltage condition is corrected.
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aR-15 II Voltage RegulatoR / poweR condItIoneR
the unit off, then on again. Avoid turning the
unit back on, without first checking the source
liFt (linear Filtering technology) of the problem, and perhaps changing the AC
Unfortunately, traditional AC filter - conditioners
source.
have been designed for unrealistic laboratory
conditions. prior technologies could actu- protection oK Indicator
ally harm audio and video performance more Although the Furman sMp+ circuit assures
than they help, due to the resonant peaking virtually protection from transient voltage
of their antiquated, non-linear designs. under spikes and surges, nature has a way of
certain conditions, these designs can actually occasionally creating electrical forces that are
add more than 10 dB of noise to the incoming beyond the capabilities of any tVss device to
AC line! Furman’s sMp+ with LiFt takes an- absorb without some degree of damage. in
other approach, ensuring optimal performance the rare instance that this occurs, the green
through linear filtering and no leakage to “Protection OK” LED indicator located on your
ground. With this exclusive filtration technol- front panel will dim. if this happens some level
ogy, all connected equipment will be free of of protection from voltage surges will remain,
noise and contamination and will operate at but the Furman’s clamping voltage rating will
optimum performance levels. be compromised. the unit must be returned
to Furman sound, or an authorized Furman
extreme Voltage shutdown Indicator service center for repair.
this Led is normally off. it monitors a hazard
common in the entertainment industry: wiring Fuses and cIRcuIt BReaKeRs
faults – for example, accidental connection
there is one fuse and one circuit breaker in the
to 220VAC where 120VAC is expected, or an
AR-series. in the event that the unit appears to
open neutral from a 208 or 240VAC feed. the
be completely dead (neither the power switch
series ii sMp+ circuit senses voltages that
nor any Led’s light up), unplug the power cord
are so high that operation would be impossible
and the load and check the breaker. if the cir-
and shuts the power down before damage
cuit breaker is tripped, a white button will pop
can occur. upon initially applying power to
up. push it back in to reset it. the purposes of
these units, the extreme Voltage indicator
these circuit protection devices are:
Led will light if the input voltage is above the
extreme voltage cutoff, and power will not be 1. A 15 amp thermal circuit breaker is acces-
applied to the unit’s outlets. if the unit has been sible at the rear panel without removing the
operating with an acceptable input voltage unit from the rack. this breaker will trip if the
and subsequently that voltage exceeds 145- unit’s 15 amp capacity is exceeded at any
150V, it will shut off power to the outlet and the time.
extreme Voltage Led will light.
2. A fast-blow 1/4 amp fuse is located inside
note: if the mains power is above the high the unit. this fuse will blow if the unit has
cutoff voltage and has caused the unit to been connected to a voltage that is above
remove power from its outlets, it cannot restore the range of the extreme Voltage shut-
power without the operator manually turning down circuitry. to replace it, the unit must
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aR-15 II Voltage RegulatoR / poweR condItIoneR
be completely disconnected from all power in particular, beware of 10-24 screws, which
and removed from its rack. the six hex head may fit if forced but which will strip the threads.
screws and two phillips head screws holding To avoid marring the front panel finish, use
the top cover must be removed. the internal plastic washers under the screw heads.
fuse is located in a holder on the printed circuit
board. Replace the fuse only with the exact desIgn
same type (1/4 fast blow). the AR-series uses a design based on an
eight-tap toroidal autoformer. the toroidal de-
Input Voltage monItoRIng sign assures minimal leakage of stray magnetic
the row of ten Led’s at the left of the front fields, and, because of its high efficiency, a very
panel make up a meter that indicates input compact size for its rating. the Voltage Regula-
VoLtAge. only one Led will light up at a time. tor’s circuitry monitors the incoming line voltage
there are is one red Led at each endpoint. with each cycle, comparing it to an extremely
when lit, they indicate that the input voltage precise voltage reference, accurate to ±0.15%.
may be above or below the point where it can If a voltage fluctuation requires that a different
be restored to the selected nominal output volt- tap be selected, the new tap is electronically
age (though it may still be restored to a usable switched exactly at the zero-crossing, to avoid
level) but is not high or low enough to cause an distorting the AC waveform. if necessary, it can
extreme voltage shutdown. switch taps as often as once each cycle. Most
commercial voltage regulators using multiple-
Voltage monItoRIng tapped transformers switch taps at uncontrolled
A green Led labelled in ReguLAtion indicates times, thereby creating voltage spikes and
proper function (i.e., that the output voltage is clicks that can leak into the audio! Hysteresis in
within ±5V of the selected output voltage). Your the switching circuits avoids “chatter” or unnec-
equipment will always work normally when this essary switching back and forth between adja-
light is on, and often will work satisfactorily even cent taps. unlike those voltage regulators that
when it is off. employ ferro-resonant transformers, Furman
Voltage Regulators are not sensitive to small
InstallatIon errors in line frequency, making them ideal for
Because of their toroidal transformer design, use with generators.
Furman Voltage Regulators may be posi-
tioned near most other equipment without fear maxImum and mInImum load
that the other equipment will be disrupted by the AR-15 ii can handle loads totalling up to
leakage of a strong 50/60 Hz magnetic field. 15 amperes as long as the input voltage is
nevertheless, suggested rack locations would equal to or above 124 volts. For voltages below
be either at the top or bottom. that level, its capacity must be derated at ap-
proximately 113 milliamperes per volt. (see
As with any rackmount equipment, be sure to graphs on back page.) As a practical matter,
use 10-32 machine screws for mounting in the therefore, to cope successfully with worst-case
rack’s tapped holes (this is not a metric size).
4
aR-15 II Voltage RegulatoR / poweR condItIoneR
brownout conditions, you should plan your total caused unpredictably by electric motors switch-
load so that it does not exceed 12 amps, or ing on or off (on the premises or outside), utility
1400 watts. please note that this refers to the company maintenance operations, nearby
aggregate power requirement of all equipment lightning strikes, and other factors. spikes (also
plugged into the Voltage Regulator, not to each called surges or transients) are absorbed by
individual item. special components called MoV’s in the AR-
series to provide safe voltage levels to protect
NOTE: While there is no minimum load require-
your equipment.
ment for the AR-15 II you may experience an
audible mechanical hum coming directly from the RFi/eMi inteRFeRenCe: noise from RFi
unit when the POWER switch is on with nothing (Radio Frequency interference) or eMi (electro
plugged in. This effect will sometimes disappear Magnetic interference) involves lower voltages
as soon as you plug in any equipment drawing 40 and less energy than is found in spikes, but it is
to 50 watts total. continuous rather than transient in nature. it is
not likely to cause physical damage, but it can
deFInItIons certainly be annoying, producing static in audio
VoLtAge ReguLAtion: the AC line voltage circuits, “snow” on video screens, or garbled
is a number indicating the nominal electrical data in computers. noise can be introduced into
potential that has been adopted in a region AC lines by nearby radio transmitters, certain
for powering electrical equipment of all kinds. kinds of lighting, electric motors, and others.
in most of north America it is 117 volts AC; in Because noise occurs at higher frequencies
Japan, 100 volts; and in many other countries than the 50 or 60 Hz AC line, it can be effective-
220, 230, or 240 volts. the actual voltage can ly reduced through use of low-pass filtering.
fall below or rise above this nominal level due
to brownouts, power cutbacks, use of substan- thRee-yeaR lImIted waRRanty
dard wiring, and other causes. these devia- Furman sound, LLC., having its principal place
tions can cause poor performance or a mal- of business at 1690 Corporate Circle, petaluma,
function. A regulator is a device which, through CA 94954 (“Manufacturer”) warrants its AR-15 II
use of a transformer, corrects the voltage (the “Product”) as follows:
deviation by stepping it up or down so that it is
as close as possible to the nominal level. Manufacturer warrants to the original purchaser
of the product that the product sold hereunder
spiKe: A pulse of energy on the power line. will be free from defects in material and work-
spikes can have voltages as high as 6000 manship for a period of three years from the
volts. though they are usually of very short du- date of purchase. the purchaser of the product
ration, the energy they contain can be consid- is allowed fifteen days from the date of purchase
erable, enough to damage sensitive solid-state to complete warranty registration by mail or on-
components in audio and computer equipment. line at the Furman website. if the product does
spikes can also foul switch contacts and de- not conform to this Limited warranty during the
grade wiring insulation. they are an unavoid- warranty period (as herein above specified),
able component of electric power. they are purchaser shall notify Manufacturer in writing of
5
aR-15 II Voltage RegulatoR / poweR condItIoneR
the claimed defects. if the defects are of such tHis wARRAntY is eXCLusiVe. the sole
type and nature as to be covered by this war- and exclusive obligation of Manufacturer shall
ranty, Manufacturer shall authorize purchaser be to repair or replace the defective product in
to return the product to the Furman factory or to the manner and for the period provided above.
an authorized Furman repair location. warranty Manufacturer shall not have any other obligation
claims should be accompanied by a copy of the with respect to the products or any part thereof,
original purchase invoice showing the purchase whether based on contract, tort, strict liability or
date; this is not necessary if the warranty Regis- otherwise. under no circumstances, whether
tration was completed either via the mailed in based on this Limited warranty or otherwise,
warranty card or on-line website registration. shall Manufacturer be liable for incidental,
shipping charges to the Furman factory or to special, or consequential damages. Manufac-
an authorized repair location must be prepaid turer’s employees or representatives’ oRAL oR
by the purchaser of the product. Manufacturer otHeR wRitten stAteMents do not
shall, at its own expense, furnish a replacement Constitute wARRAnties, shall not be
product or, at Manufacturer’s option, repair the relied upon by purchaser, and are not a part of
defective product. Return shipping charges the contract for sale or this limited warranty. this
back to purchaser will be paid by Manufacturer. Limited warranty states the entire obligation of
Manufacturer with respect to the product. if any
tHe FoRegoing is in Lieu oF ALL otHeR part of this Limited warranty is determined to be
wARRAnties, eXpRess oR iMpLied, void or illegal, the remainder shall remain in full
inCLuding But not LiMited to tHe iM- force and effect.
pLied wARRAnties oF MeRCHAntABiLitY
And Fitness FoR A pARtiCuLAR puR-
pose. Manufacturer does not warrant against
damages or defects arising out of improper
or abnormal use of handling of the product;
against defects or damages arising from im-
proper installation, against defects in products
or components not manufactured by Manufac-
turer, or against damages resulting from such
non-Manufacturer made products or compo-
nents. this warranty shall be cancelable by
Manufacturer at its sole discretion if the product
is modified in any way without written authori-
zation from Furman sound. this warranty also
does not apply to products upon which repairs
have been affected or attempted by persons
other than pursuant to written authorization by
Manufacturer.
6
seRVIce
Before returning any equipment for repair,
please be sure that it is adequately packed
and cushioned against damage in shipment,
and that it is insured. we suggest that you
save the original packaging and use it to
ship the product for servicing. Also, please
enclose a note giving your name, address,
phone number and a description of the
problem. AR-15 ii output Current Capacity
note: All equipment being returned for re-
pair must have a Return Authorization (RA)
number. to get an RA number, please call
the Furman service department, (707) 763-
1010, ext. 2370 or 2377, between 8 a.m.
and 5 p.m. U.S. Pacific Time, or fax to (707)
763-1310. please display your RA number
prominently on the front of all packages.
specIFIcatIons 10 dB @ 10 kHz
40 dB @ 100 kHz
100 dB @ 10 MHz
Spike Protection Modes: Linear attenuation curve from 0.05 - 100 ohms line impedance
Line to neutral, zero ground leakage
Shutdown Range:
Spike Clamping Voltage:
188 Vpk @ 3,000 amps, 133 VAC RMS Above 137 VAC typically
(tested to UL-1449 6,000 Vpk @ 3,000 amps)
Dimensions:
Response time: 19 “ W x 11.63” D x 1.75” H
1 nanosecond (48.26 x 29.54 x 4.45 cm)
Maximum surge current: Weight:
6,500 amps 14.5 lbs. (6.58 kg)
Voltmeter Accuracy: Current Rating:
The AR-15 II is capable of 15 amps for input voltages
±5V of 124V (104V in 100V mode) or higher; derate at 113
mA per volt to a minimum of 12:3A
“In Regulation” Ranges:
AR-15 II: Provides regulation ±5V in 120V mode from Three Year Limited Warranty:
97 to 137V The AR-15 II is protected by a limited three-year warranty covering defects
in materials and workmanship.
Noise attenuation:
Furman sound, LLC. • 1690 Corporate Circle • petaluma, CA 94954-6919 usA
phone: 707-763-1010 • Fax: 707-763-1310 • web: www.Furmansound.com • e-mail: info@furmansound.com
070802-d Made in China
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