Series Mode
Protection
Series
II
PL-8 II
PM-8 II
PL-PLUS II
PL-PLUS D II
POWER CONDITIONERS
SERIES
II
SERIES II POWER CONDITIONERS
Furman Series II Features
 SMP with extreme voltage shutdown
 LiFT (Linear Filtering Technology) with zero ground contamination
 Eight rear panel outlets and one front panel outlet
 15 amp rating, with circuit breaker
 Three year limited warranty
PL-8 Series II Additional Features
 Two retractable, long-life, low-heat LED light fixtures with dimmer
switch for rack illumination
 BNC connector on the rear panel allows you to attach any standard
(12VAC 0.5 amp) gooseneck lamp to illuminate the rear of your rack
PL-PLUS Series II Additional Features
 Two retractable, long-life, low-heat LED light fixtures with dimmer
switch for rack illumination
 BNC connector on the rear panel allows you to attach any standard
(12VAC 0.5 amp) gooseneck lamp to illuminate the rear of your rack
 Front panel meter to display incoming line voltage ranging from 90 to
128 volts (D version has a digital meter instead of LED’s)
PL-PLUS D Series II Additional Features
 Two retractable, long-life, low-heat LED light fixtures with dimmer
switch for rack illumination
 BNC connector on the rear panel allows you to attach any standard
(12VAC 0.5 amp) gooseneck lamp to illuminate the rear of your rack
 Laboratory precision Digital Voltmeter displays incoming line voltage
(+/- 1 VAC)
PM-8 Series II Additional Features
 Laboratory precision Digital Voltmeter displays incoming line voltage
(+/- 1 VAC)
 True RMS Current Meter displays power draw (+/- 0.1 amp)
 BNC connector on the rear panel allows you to attach any standard
(12VAC 0.5 amp) gooseneck lamp to illuminate the rear of your rack
1
SERIES II POWER CONDITIONERS
INTRODUCTION
Thank you for purchasing a Furman Series II
Power Conditioner, and congratulations on your
choice. The Series II power conditioners feature
Furman’s revolutionary Series Mode Protection
(SMP) circuit, as well as our exclusive Linear
Filtering Technology (LiFT). Together, these
technologies comprise what is, without question,
the world’s most advanced and comprehensive
transient voltage surge suppressor / conditioner.
SMP (Series Mode Protection)
Furman’s maintenance-free SMP surge
suppression virtually eliminates service calls.
Traditional surge suppression circuits “sacrifice”
themselves when exposed to multiple transient
voltage spikes, requiring the dismantling of your
system, and repair of your surge suppressor. Not
so with SMP. With Furman’s SMP, damaging
transient voltages are safely absorbed, clamped,
and dissipated. No sacrificed parts, no service
calls, no down time.
Unique to Furman’s SMP is its unparalleled
clamping voltage. While other designs offer
clamping voltages that are well above 330 Vpk,
Furman’s SMP clamps at 188 Vpk, (133 VAC
RMS) even when tested with multiple 6000 Vpk
- 3000 amp surges! This unprecedented level of
protection is only available with Furman’s SMP
technology. Additionally, Furman’s trusted overvoltage circuitry protects against all too frequent
accidental connections to 208 or 240 VAC, by
shutting off the incoming power until the over
voltage condition is corrected.
[For E versions: Furman’s SMP clamps at 376
VpK, (266 VAC RMS.)]
LiFT (Linear Filtering Technology)
Unfortunately, traditional AC filter - conditioners
have been designed for unrealistic laboratory
conditions. Prior technologies, whether
multiple pole filter or conventional series
mode, could actually harm audio and video
performance more than they help, due to the
resonant peaking of their antiquated, non-linear
designs. Under certain conditions, these
designs can actually add more than 10 dB of
noise to the incoming AC line! Worse still, lost
digital data, the need to re-boot digital pre-sets,
or destroyed digital converters are frequently
caused by excessive voltage spikes and AC
noise contaminating the equipment ground.
Furman’s SMP with LiFT takes another
approach, ensuring optimal performance
through linear filtering and no leakage to
ground.
S A F E T Y I N F O R M AT I O N
To obtain best results from your Furman Series
II Power Conditioner, please read this manual
carefully before using.
2
SERIES II POWER CONDITIONERS
WA R N I N G
To reduce the risk of electrical shock, do not
expose this equipment to rain or moisture.
Dangerous high voltages are present inside the
enclosure. Do not remove the covers. Refer
servicing to qualified personnel only. The
lightning flash with an arrowhead symbol, is
intended to alert the user to the presence of
un-insulated dangerous voltage within the
product’s enclosure that may be of sufficient
magnitude to constitute a risk of electric shock.
I M P O R TA N T S A F E T Y
INSTRUCTIONS
(Please read prior to installation)
1. Please read and observe all safety and
operating instructions before installing your
Series II unit. Retain these instructions for
future reference.
2. Your Series II unit should not be used near
water – for example, near a bathtub, washbowl,
kitchen sink, laundry tub, in a wet basement,
near a swimming pool, etc.
3. Do not place your Series II unit near heat
sources such as radiators, heat registers,
stoves, or other appliances that produce heat.
4. The PL-8 II, PL-Plus II, PL-Plus D II, and PM8 II should only be connected to a 120 VAC,
60Hz, 15 amp grounded electrical outlet. Do
not defeat the ground or change polarization of
the power plug. (E- versions 220 – 240 VAC 50 Hz. /
J- versions 100 – 120 VAC 50 Hz.)
3
5. Route the power cord and other cables so
that they are not likely to be walked on, tripped
over, or stressed. Pay particular attention
to the condition of the cords and cables at
the plugs, and the point where they exit your
Series II unit. To prevent risk of fire or injury,
damaged cords and cables should be replaced
immediately.
6. Clean your Series II unit with a damp cloth
only. Do not use solvents or abrasive cleaners.
Never pour liquid on or into the unit.
7. Your Series II unit should be serviced by
qualified service personnel when:
• The power supply cord or the plug has been
frayed, kinked, or cut.
• Objects have fallen or liquid has spilled into
the unit.
• The unit has been exposed to rain or other
moisture.
• The unit does not appear to operate normally.
• The “Protection OK” indicator is not lit.
• The unit has been dropped, or the enclosure
has been damaged.
• The retractable LED lights have failed. (not
applicable to the PM-8 II)
8. Your Series II unit requires that a safety
ground be present for proper operation. Any
attempt to operate the unit without a safety
ground is considered improper operation and
could invalidate the warranty.
9. Do not attempt to service your Series II unit
beyond what is described in this manual. All
other servicing should be referred to qualified
service personnel.
SERIES II POWER CONDITIONERS
ADDITIONAL F E A T U R E S
PL-8 SERIES II
The PL-8 II features LED rack lights which
produce virtually no heat and provide an
extremely long life span. A dimmer control
for the rack lights allows the user to adjust
the level of illumination or simply switch the
lights off. Additionally, a rear mounted BNC
jack accepts any standard (12VAC 0.5 amp)
gooseneck lamp for rear rack illumination.
The PL-8 II has a master switch for all outlets
that glows red when the power is on. The frontpanel circuit breaker can be quickly and easily
reset should the unit be overloaded. The PL-8
II also features a 10 foot, 14 gauge heavy-duty
power cable.
PL-PLUS SERIES II
The PL-Plus II features LED rack lights which
produce virtually no heat and provide an
extremely long life span. A dimmer control for
the rack lights allows the user to adjust the
level of illumination or simply switch the lights
off. A rear mounted BNC jack accepts any
standard (12VAC 0.5 amp) gooseneck lamp for
rear rack illumination.
Additionally, the PL-Plus II offers a 20
segment LED bar-graph meter that displays
incoming voltage between 90 and 128 volts
in 2-volt steps. The normal range voltages
are indicated in green, with moderately and
extremely high or low voltages in yellow and
red respectively. The voltmeter’s accuracy is ±2
volts. It can easily be re-calibrated, if necessary.
(E- versions 180 – 256 VAC in 4 volt steps / Jversions 80 - 118 VAC in 2 volt steps)
The PL-Plus II has a master switch for all
outlets that glows red when the power is on.
The front-panel circuit breaker can be quickly
and easily reset should the unit be overloaded.
The PL-Plus II also features a 10 foot, 14
gauge heavy-duty power cable.
PL-PLUS D SERIES II
The PL-Plus D II features LED rack lights
which produce virtually no heat and provide
an extremely long life span. A dimmer control
for the rack lights allows the user to adjust the
level of illumination or simply switch the lights
off. A rear mounted BNC jack accepts any
standard (12VAC 0.5 amp) gooseneck lamp for
rear rack illumination.
Additionally, the PL-Plus D II offers a laboratory
precision digital meter that displays incoming
voltage in 1-volt steps. The voltmeter’s
accuracy is ±1.5 volt.
The PL-Plus D II has a master switch for all
outlets that glows red when the power is on.
The front-panel circuit breaker can be quickly
and easily reset should the unit be overloaded.
The PL-Plus D II also features a 10 foot, 14
gauge heavy-duty power cable.
PM-8 SERIES II
The PM-8 II features two laboratory precision
digital meters that display both incoming
voltage in 1-volt steps, and a true R.M.S.
current meter that measures the AC power
draw within 0.1 amp. A rear mounted BNC
jack accepts any standard (12VAC 0.5 amp)
gooseneck lamp for rear rack illumination.
4
SERIES II POWER CONDITIONERS
The PM-8 II has a master switch for the rear
outlets that glows red when the power is on.
The front-panel circuit breaker can be quickly
and easily reset should the unit be overloaded.
The PM-8 II also features a 10 foot, 14 gauge
heavy-duty power cable.
O P E R AT I O N
Retractable Rack Lights, Rear Panel Lamp
and Dimmer Control:
The PL-8 II, PL-Plus, and PL-Plus D II utilize
a dimmer control for the two retractable front
panel light tubes. The dimmer knob controls
the brightness of both light fixtures. Turn
it clockwise to increase brightness; turn it
counterclockwise to decrease brightness.
When the lights are not in use, we recommend
turning the dimmer fully counterclockwise to
maximize the life of the LED’s, however, this
is not absolutely necessary. Whether the light
tubes are retracted or flush with the front panel,
there will be no appreciable heat regardless of
dimmer setting due to the efficiency of our full
light spectrum LED’s.
5
All Series II units feature a rear rack BNC
socket which will accept any 12 VAC (0.5A)
gooseneck lamp assembly, (such as the
Furman GN-LED or GN-I). Simply slide
the BNC plug over the socket and rotate
clockwise until the connector snaps into the
locked position. The rear rack lamp can be
powered on or off with the rear light power
switch located on the far left of the front
panel. The Series II’s front panel LED lamps
must be replaced by qualified Furman service
personnel.
Multi-Segment LED voltmeter:
(PL-Plus II only)
This three-color, 20-LED bargraph is an
accurate, self checking AC voltmeter that
continually measures normal voltages. The
meter reads from 90 to 128 volts in 2 volt
increments (PL-PLUS E II: 180 to 256 volts, in
4 volt increments). The normal range voltages
are indicated in green, with moderate and
extremely high or low voltages in yellow and
red respectively. The voltmeter provides three
special flashing patterns to indicate abnormal
conditions.
Mains Vltg.
Voltage Status
Voltmeter Reading
Outlets
80-90
90-104
106-108
110-120
122-124
126-128
130-140
Above 140
Low Marginal
Low
Medium Low
Normal
Medium High
High
High Marginal
Extreme (Shutdown)
The LED beneath the 90V mark flashes
ON
Meter Reads in Low Red
ON
Meter Reads in Low Yellow
ON
Meter Reads in Green
ON
Meter Reads in High Yellow
ON
Meter Reads in High Red
ON
All Meter LEDs Flash
ON
Meter off—Extreme Voltage LED illuminates OFF
SERIES II POWER CONDITIONERS
(1) If only the single leftmost (beneath the
90V mark – 180V for E version) LED
flashes, the input voltage is marginally
low.
(2) If all of the LED’s on the voltmeter
flash, the input voltage is marginally
high. Power to the PL-Plus’s outlets
will remain unless the incoming voltage
rises above the Extreme Voltage
Shutdown cutoff voltage (135 - 140
volts – 270 – 280 volts E version).
(3) If none of the LED’s on the voltmeter
are lit, and the Extreme Voltages
LED indicator is illuminated, then the
PL-Plus II has shut down power to its
outlets because the input voltage is in
a range considered extreme (in excess
of 135 volts - 270 volts E- version).
Digital Voltmeter:
(PL-Plus D II and PM-8 II only)
Furman’s laboratory precision AC digital
voltmeter continually measures incoming
voltages, within a typical tolerance of +/1.5VAC. It should be noted that the voltage
reading is incoming. No adjustment should be
necessary on these units.
Digital Current Meter: (PM-8 II only)
Furman’s laboratory precision AC digital
current meter continually measures the total
circuit AC load, within a typical tolerance of
+/- 0.5 amp. Because these meters feature
true R.M.S. technology, the current readings
are accurate regardless of load conditions
(capacitive, inductive or resistive).
NOTE: The PL-8 II, PL-Plus II, PL-Plus D II,
and PM-8 II do not compensate for high or low
line voltage. If you frequently move your rack to
different locations, derive power from generators,
use long extension cords, travel internationally,
or are in an area prone to brownouts, you may
benefit from the use of one of Furman’s AC Line
Voltage Regulators.
On/Off Rocker Switch:
This 15 amp capacity power switch is specifically
designed to stand up to the enormous high inrush
current demands of many Power Amplifiers.
Additionally, the semi-transparent rocker lights
when switched to the “ON” position. (E-versions
feature 10 amp capacity)
Extreme Voltage Shutdown Indicator:
This LED is normally off. It monitors a hazard
common in the entertainment industry: wiring
faults – for example, accidental connection
to 220VAC where 120VAC is expected, or an
open neutral from a 208 or 240VAC feed. The
Series II SMP 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
cutoff, 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
voltage exceeds 135V, it will shut off power to
the outlet and the Extreme Voltage LED will light.
(E version: over voltage shut down is 270 VAC.
Guards against open neutral and accidental
connection to 300+ VAC)
Protection OK Indicator:
Although the Furman SMP circuit assures virtually
maintenance free protection from transient
voltage spikes and surges, nature has a way of
occasionally creating electrical forces that are
6
SERIES II POWER CONDITIONERS
beyond the capabilities of any TVSS device to
absorb without some degree of damage. In
the rare instance that this occurs, the green
“Protection OK” LED indicator located on your
front panel will dim. If this happens, some
level of protection from voltage surges will
remain, but the Furman’s clamping voltage
rating will be compromised. The unit must be
returned to Furman Sound, or an authorized
Furman Service center for repair.
NOTE: If the mains power is above the high
cutoff voltage and has caused the unit to
remove power from its outlets, it cannot restore
power without the operator manually turning
the unit off, then on again. Avoid turning the
unit back on, without first checking the source
of the problem, and perhaps changing the AC
source.
T R O U B LE S H O O T I N G G U I D E
1.) Symptom: No power to the AC outlets.
Possible Cause: Circuit breaker has tripped
due to excessive load.
Action Needed: Remove one piece of
equipment from the Series II unit, and push the
square re-set tab into the Circuit breaker bezel.
2.) Symptom: No power to the AC outlets,
“Protection OK” indicator is not lit.
Possible Cause: Either the AC outlet to which
your Series II device is connected has no AC
voltage present, or the unit has been subjected
to a sustained voltage in excess of 400 Volts.
Action Needed: Plug the Series II unit into an
7
AC receptacle where AC voltage is present. If
the problem persists, the protection circuit may
be damaged, and require factory service.
3.) Symptom: Extreme Voltage indicator lit.
Possible Cause: Input voltage is above 135140 volts (270 – 280 volts E version), causing
power to the unit’s outlets to be shut down.
Additionally, if the voltage is below 85 - 90 volts
at turn on, the unit will not allow AC voltage to
reach the outlets.
Action Needed: Correct the line voltage, then
turn the unit on. Consider installing a Furman
voltage regulator.
DEFINITIONS
SPIKE: This is a pulse of energy on the
power line. Spikes can have voltages as
high as 6000 volts. Though they are usually
of very short duration, the energy they
contain can be considerable, enough to
damage sensitive solid-state components
in audio and computer equipment. Spikes
can also foul switch contacts and degrade
wiring insulation. They are an unavoidable
component of electric power. They are caused
unpredictably by electric motors switching
on or off (on the premises or outside), utility
company maintenance operations, lightning
strikes and other factors. Spikes (also called
surges or transients) are absorbed by special
components in the PL-8 and PL-PLUS to
provide safe voltage levels to protect your
equipment.
RFI/EMI INTERFERENCE: Noise from RFI
(Radio Frequency Interference) or EMI (Electro
SERIES II POWER CONDITIONERS
Magnetic Interference) involves lower voltages
and less energy than is found in spikes, but it
is continuous rather than transient in nature.
It is not likely to cause damage, but it can
certainly be annoying, producing static in audio
circuits, “snow” on video screens, or garbled
data in computers. Noise can be introduced
into AC lines by nearby radio transmitters,
certain kinds of lighting, electric motors, and
other sources. Because noise occurs at higher
frequencies than the 50 or 60 Hz AC line, it can
be effectively reduced through use of low-pass
filtering.
THREE YEAR LIMITED
WARRANTY
The Furman Series II units are protected by
a limited three year warranty, covering defects
in materials and workmanship, provided that the
registration card is filled out and returned by the
customer. Otherwise, a one year warranty applies.
Products must have a proof of purchase from
a Furman authorized dealer. During this period,
Furman will make any necessary repairs without
charge for parts or labor. Shipping charges to the
factory or repair station must be prepaid by the
owner; return shipping charges (via UPS ground)
will be paid by Furman. This warranty applies
only to the original owner. Also, it does not apply
to repairs done by other than the Furman factory
or Authorized Repair Stations.
This warranty may be cancelled by Furman at
its sole discretion if the unit has been subjected
to physical abuse (including, but not limited to,
connection to improper AC or DC voltages), or
has been modified in any way without written
authorization from Furman. Furman’s liability
under this warranty is limited to repair or
replacement of the defective unit.
Furman will not be responsible for incidental
or consequential damages resulting from
the use or misuse of its products. EXCEPT
AS PROVIDED HEREIN, FURMAN SOUND
MAKES NO WARRANTIES, EXPRESSED
OR IMPLIED, INCLUDING WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. Some states do not
allow the exclusion of incidental or consequential
damages, so this limitation may not apply to you.
This warranty gives you specific legal rights, and
you may also have other rights which vary from
state to state.
Warranty claims should be accompanied by a
copy of the original purchase invoice showing the
purchase date (if a Warranty Registration Card
was submitted at the time of purchase, this is not
necessary). 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. Please enclose a note
giving your name, address, phone number and a
description of the problem.
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.
NOTE: All equipment being returned for repair
must have a Return Authorization (RA) Number.
To get an RA Number, please call the Furman
Service Department: (707) 763-1010, ext. 121.
Please display your RA Number prominently on
the front of all packages.
8
PL-8 Series II
Additional Switched Outlet
Light Switch II POWER CONDITIONERS
SERIES
Dimmer Switch
Voltmeter
Dimmer Switch
LED Rack Lights
PL-PLUS D Series II
Light Switch
Dimmer Switch
PM-8 Series II
Light Switch
Power Switch
LED Rack Lights
PL-PLUS Series II
Light Switch
Circuit Breaker
Voltmeter
LED Rack Lights
Voltmeter
Current meter
Circuit Breaker
Power Switch
Additional Switched Outlet
Circuit Breaker
Power Switch
Additional Switched Outlet
Circuit Breaker
Power Switch
Additional Switched Outlet
Rear of all
9
8 Switched Outlets
BNC Connector for Goosneck Light
SERIES II POWER CONDITIONERS
SPECIFICATIONS
Current rating:
15 amps (“E” versions 10 amps)
Operating Voltage:
90 to 140 VAC (“E” versions 180 to 280 VAC)
Over Voltage Shutdown:
140 VAC typically (“E” versions 280 VAC typically)
Voltmeter Accuracy:
PL-PLUS II only: ±2 VAC, calibrated with internal
trimpot adjustments
PL-PLUSD & PM-8: ±1.5 VAC,
Current meter: ±0.1VAC
Make sure to pick up one of Furman’s
goosneck lights - the perfect accesory
for your Series II unit.
GN-LED
Spike Protection Modes:
Line to neutral, zero ground leakage
Spike Clamping Voltage:
188 Vpk @ 3,000 amps, (133 VAC RMS)
(“E” Version: 376 Vpk (266 VAC RMS)
GN-I
Response time:
1 nanosecond
Maximum surge current:
6,500 amps
Noise attenuation:
10 dB @ 10 kHz
40 dB @ 100 kHz
100 dB @ 10 MHz
Linear attenuation curve from 0.05 - 100 ohms
line impedance
Mechanical:
Dimensions: 1.75” H x 19” W x 10.5” D.
Weight: 11 lbs (5 kg).
Construction: Steel chassis, .125” brushed and
black anodized aluminum front panel; glass epoxy
printed circuit boards
Power Consumption:
PL-8 II, 6 watts
PL-PLUS II, 12 watts
PL-PLUS D II, 12 watts
PM-8 II, 12 watts
Safety Agency Listings:
CE, NRTL-C
10
SERIES II POWER CONDITIONERS
Furman Sound, Inc.
1997 South McDowell Blvd.
Petaluma, California 94954-6919 USA
Phone: 707-763-1010
Fax: 707-763-1310
Web: www.furmansound.com
E-mail: info@furmansound.com
020404-E
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