AudioQuest PowerQuest 707 User manual

Owner’s Manual
Manuel de l’utilisateur
Power Conditioner
Conditionneur d’alimentation
707
[Schuko-EU ]
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2
PowerQuest 707 EU Features 3
Introduction 3
Installation/Unpacking 5
Unpacking 5
Safety Information/Warnings 5
Servicing/Return to AudioQuest 5
Power Source 5
Placement 5
Connection to Audio/Video Components 6
AC Cable Routing 6
High Current/Low-Z Power Banks 6
Ultra-Linear Filtered Power Outlets 7
Suggested AC Connections 7
Operation and Continuous Use 8
Power Switch/Circuit Breaker and LED Power Indicator 8
PowerQuest 707 EU Current Draw 8
Overvoltage Protection Indicator 8
Break-in Time/Continuous Use 9
Specications 10
Trouble-Shooting Guide 11
Warranty 13
Français 15
ENGLISH

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PowerQuest 707 EU Features
¡45 Amps peak Transient Power Correction (up to 25 mS)
¡Ultra-Linear Dierential Filter: 8kHz – 1GHz (well in excess of 22dB)
¡Ultra-Linear Common-Mode Filter: 30kHz – 100MHz (well in excess of 22dB)
¡Both lters linearized for (rising) line impedance with frequency from 0.05 Ohms (source) and
10 to 50 Ohms load (system current dependent)
¡Non-Sacricial Surge Suppression (will withstand multiple strikes of 6000V or 3000A
without damage)
¡Extreme Voltage Shutdown: 270VAC. Will activate main circuit relay in under 0.25 seconds.
Automatically resets once incoming voltage is within a safe range
¡(3) High-Current spec-grade outlets; (4) Ultra-Linear Filtered Source outlets
¡Detachable 2-meter PowerQuest PQ-716 AC cord featuring ZERO-Tech and RF/ND-Tech
¡Ultra-low impedance magnetic circuit breaker/power switch
¡Maximum Input Current Capacity: 10A RMS
¡2RU rack mountable metal chassis (rack ears included)
Introduction
The science of AC power is not simple; it demands focus, and the devil is in the details. In fact, the mammoth
increase in airborne and AC-line-transmitted radio signals, combined with overtaxed utility lines and the
ever-increasing demands from high-denition audio/video components, has rendered our utilities’ AC power
an antiquated technology.
Where Alternating Current (AC) is concerned, we’re relying on a century-old technology created for
incandescent lights and electric motors—technology that was certainly never meant to power the
sophisticated analog and digital circuits used in premium audio/video systems. To properly accommodate the
promise of today’s ever-increasing bandwidth and dynamic range, we must achieve extraordinarily low noise
across a wide range of frequencies.
Further, today’s power ampliers are being taxed for instantaneous peak-current demand, even when they’re
driven at modest volumes. Although we have seen a substantial increase in both dynamics and bass content
from our audio software, the loudspeakers we employ to reproduce them are no more ecient than they
were two to four decades ago. This places great demands on an amplier’s power supply, as well as the
source AC power supplying it.
Our systems’ sensitive components need better alternating current—a fact that has resulted in a host of AC
power conditioning, isolation transformers, regeneration ampliers, and battery back-up system topologies.
Through dierential sample tests and spectrum analysis, it can be proven that up to a third of a high-
resolution (low-level) audio signal can be lost, masked, or highly distorted by the vast levels of noise riding
along the AC power lines that feed our components. This noise couples into the signal circuitry as current
noise and through AC ground, permanently distorting and/or masking the source signal.
All sincere attempts to solve this problem must be applauded since once the audio/video signal is gone, it’s
gone forever...
For AudioQuest, honoring the source is never a matter of simply using premium “audiophile-grade parts” or
relying on a proprietary technology—common approaches used within the audiophile market. For years, we
have all been witness to the same, seemingly endless audiophile debates: Valves versus transistors. Analog
versus digital. Can cables really make a dierence? The debates go on and on. While we, too, can brag

4
about our many unique technologies, we realize that true audio/video optimization is never a matter of any
one secret or exotic circuit. When it comes to noise dissipation for AC power, many approaches can yield
meaningful results. However, they may also impart ringing, current compression, and non-linear distortions
that are worse than the disease.
The PowerQuest 707 EU uses the widest bandwidth-linearized noise-dissipation circuit in its class. Our unique
passive/active Transient Power Correction Circuit features an instantaneous current reservoir of over 45 amps
peak, specically designed for modern current-starved power ampliers. Most AC power products featuring
“high-current outlets” merely minimize current compression; the PowerQuest 707 EU works to correct it.
Though it’s easy to boast, it’s quite another thing to create a solution that is consistent, holistic, functional,
and that honors veriable science. It’s not enough to reduce AC line noise and its associated distortions at
just one octave, thus leaving vulnerable the adjacent octaves and octave partials to noise, resonant peaking,
or insucient noise reduction. Consistency is key. We should never accept superior resolution in one octave,
only to suer from masking eects a half-octave away and ringing artifacts two octaves from there. This is
the principal criterion for all AudioQuest’s AC power products.
The PowerQuest 707 EU represents over 25 years of exhaustive research and proven AC power products
designed for audiophiles, broadcast engineers, and professional audio applications. We welcome you to
experience the PowerQuest 707 EU and hear rsthand the remarkable results of highly optimized power
management.
—Garth Powell, Senior Director of Engineering, AudioQuest

5
Installation | Unpacking
Before unpacking your PowerQuest 707 EU, inspect the carton for any obvious damage to the boxes
and internal protective materials. If internal damage is likely, contact the carrier who delivered the unit.
If shipping damage is evident on the product, then please contact your shipping carrier. Please save all
shipping and packing materials. Should you move or otherwise need to transport your PowerQuest 707 EU,
these packing materials will ensure the safest transportation. The carton should contain the PowerQuest 707
EU (220-240V Schuko AC Outlets), two foam inserts, owner’s manual, rack-mount kit, and 2m PowerQuest
PQ-716 AC power cord. Registration is recommended. In the event that your original ownership documents
are lost, your registration can be used to establish whether the unit is within the warranty period.
Safety Information | Warnings
Before operating the PowerQuest 707 EU, please read and observe all safety and operating instructions.
Retain these instructions for future reference.
¡Do not disassemble or in any way modify the PowerQuest 707 EU. There are no user-serviceable
parts inside.
¡Keep away from moisture and avoid excessive humidity.
¡Do not allow liquids or foreign objects to enter the unit.
Servicing | Return to AudioQuest
Servicing of the PowerQuest 707 EU must be performed by AudioQuest, and is only required when:
¡The PowerQuest 707 EU has been exposed to rain, ooding, or extreme moisture.
¡The PowerQuest 707 EU does not appear to operate normally. (See “Trouble-Shooting Guide.”)
¡The PowerQuest 707 EU has been dropped and sustained considerable physical damage.
If sending the PowerQuest 707 EU to AudioQuest for servicing (or shipping it for any reason), please use the
factory-approved packaging materials. If you have lost any of these (carton, two foam inserts, one poly bag),
please contact AudioQuest for replacements. We will provide replacement packaging materials for a nominal
charge; shipping costs will be paid by the individual or company requesting the packaging material. Please
do not rely on other methods of packaging, including those provided or suggested by packaging/mailing
stores. These methods and materials could seriously damage the product, as well as its nish. Even the loss of
the thick polybag is enough to permanently damage the nish during transport. If you have lost the original
packaging material, please request replacement materials from AudioQuest.
Power Source
Ideally, the power source to which the PowerQuest 707 EU is connected should be adequate for use at 220-
240V single phase nominal voltage, 10 amps (current capacity RMS or greater).
For proper operation, the PowerQuest 707 EU requires a safety ground (supplied via the power utility AC wall outlet).
Placement
The PowerQuest 707 EU is manufactured with four rubber textured polymer feet for safe, secure placement
on any table, cabinet, shelf, or oor. When rack-mounting is required, these feet may be removed with
a standard Phillips screwdriver. Placement or proximity to other components is not critical, and, under
standard use, the PowerQuest 707 EU does not produce any appreciable heat. The PowerQuest 707 EU may
be rack-mounted in a standard 19” rack by attaching the included 2-RU rack ears. To attach the optional

6
rack ears to the PowerQuest 707 EU chassis, rst remove the three Phillips athead screws from the front
portion of both the left and right sides of the cover assembly. Next, mount the rack ears ush against the
back of the PowerQuest 707 EU’s front panel. Finally, secure the rack ears into place by installing the rack-
mount kit’s Phillips pan head screws.
When tight installations do not provide adequate room in a rack, shelf, or cabinet, the PowerQuest 707
EU can be placed on its side. Such placement will pose no safety or performance compromises, but we
recommend placing a soft towel or carpet under the unit to prevent the chassis and front panel from being
scratched or marred in any way.
Connection to Audio/Video Components
AC Cable Routing
Once the PowerQuest 707 EU is placed, a 15-amp-rated (or greater), high-current AC cord must be connected
to the rear-panel AC inlet (IEC-C14) connector. The AC cord must have an IEC-C13 female end connector and
a grounded male 220-240VAC Edison/NEMA plug. We highly recommend the use of the supplied PowerQuest
PQ-716 AC cord or any AudioQuest NRG-Z, Wind Series, or High-Current Storm Series AC cable.
When facing the PowerQuest 707 EU’s rear panel, the IEC-C14 inlet is located on the unit’s lower-left side. The
AC inlet cord must be connected to an appropriate AC outlet (see “Power Source”).
Whenever possible, it is best to keep at least three inches (approximately 7cm) between AC cables and any
signal cable. When this is not possible in a practical layout of system cabling, crossing the AC cables to signal
cables at 90 degrees is best to minimize induced noise.
High-Current | Low-Z Power Outlets
There are three High-Current/Low-Z Power outlets (labeled “1” through “3”—three discrete outlets in all).
These outlets feature our Transient Power Correction Technology (45 amps peak - up to 25 mS duration)
and are designed to enhance the performance of power ampliers via our circuit’s low-impedance transient
current reservoir. Power ampliers, monoblock ampliers, integrated ampliers, powered receivers, or
powered subwoofers should be connected to these outlets.
Regardless of class of operation or circuit topology (valve, solid-state, digital, or otherwise), the Transient
Power Correction Circuit will not compress the current of any power amplier. Quite to the contrary, it will
improve the amplier’s performance by supplying the low-impedance current source that the amplier’s
power supply so desperately needs.
However, the other four AC outlets (Ultra-Linear Noise-Filtering), are not optimized for most power ampliers.
They have been optimized for line-level audio preampliers, DACs, universal players, turntables, and video
products that utilize constant-current voltage amplier circuits. These circuits never suer from current
compression, but their lower input level and higher gain require a more robust means of noise dissipation.
This is key to the PowerQuest 707 EU’s discrete AC power banks, in that not every circuit is treated the same,
but rather isolated bank by bank and optimized for best performance.

7
Ultra-Linear Filtered Power Outlets
There are four outlets (4 discrete outlets in all, labeled “4” through “7”) that utilize this technology within
the PowerQuest 707 EU. All four of these are in turn isolated from the High-Current/Low-Z outlets, labeled 1
through 3. This oers a great advantage in controlling the complex interactions of RF (radio frequency) and
other induced noises present in the AC power supplied from your utility, the noise that will be present on
and in every AC cord, and the noise that is produced within your system’s components and that “backwashes”
into the PowerQuest 707 EU’s output circuits.
Though it would be simple to recommend putting the digital or video components into outlets 4, 5 and
the line-level audio components and turntables into outlets 6 and 7, the quest for optimal performance is
more complex. This scenario will work, and likely work well, but a certain amount of experimentation is best
given the fact that no lter can eliminate 100% of all noise. The size of many of these RF-induced waveforms
possess sinewaves as small as the edge of a piece of paper, and the interactions are complex. So long as the
power ampliers are in their appropriate outlets (1 through 3), and the other components are in outlets 4
through 7, you should experience exemplary performance.
Suggested AC Connections
16 Amp
Rated
AC Cord
Phono Amp
Cable / Sat Box DAC
Switcher
Line-Level Pre Amp
Mono Block
Stereo
Amplier
Phono Amp
Cable / Sat Box DAC
Switcher
Line-Level Pre Amp
Mono Block
Phono Pre-
amplier
Phono Amp
Cable / Sat Box DAC
Switcher
Line-Level Pre Amp
Mono Block
Streamer –
DAC
Phono Amp
Cable / Sat Box DAC
Switcher
Line-Level Pre Amp
Mono Block
Line-Level
Preamp
Phono Amp
Cable / Sat Box DAC
Switcher
Line-Level Pre Amp
Mono Block
Switch
Phono Amp
Cable / Sat Box DAC
Switcher
Line-Level Pre Amp
Mono Block
Powered
Loudspeaker
Phono Amp
Cable / Sat Box DAC
Switcher
Line-Level Pre Amp
Mono Block
Subwoofer
Phono Amp
Cable / Sat Box DAC
Switcher
Line-Level Pre Amp
Mono Block
Note: Outlets 4 through 7 are subject to many variables and circuit conditions, so experimentation for best
results is encouraged. Power ampliers must be connected to outlets 1 through 3.

8
Operation and Continuous Use
Power Switch | Circuit Breaker and LED Power Indicator
Once the AC cords are properly connected to the AC source tap, and the components are connected to
the appropriate outlet banks, it is safe to energize the PowerQuest 707 EU. On the right-hand side of the
PowerQuest 707 EU’s front panel, there is a black rocker switch. Firmly press the rocker switch so that its
upper portion is ush with the front panel. Typically, within a couple of seconds, you should hear an audible
“clack” sound(s) from one or more relays within the PowerQuest 707 EU. At the same time, the front-panel
LED power indictor will glow green, signifying that the unit is operational. (If this does not occur, see the
“Trouble-Shooting Guide” in this manual.)
PowerQuest 707 EU Current Draw
The Transient Power Correction Circuit creates a reactive current draw of as much as 3 to 4 amps RMS at
idle (real-world draw is a small fraction of an amp), and electrical technicians who connect a current probe
to a product such as this are frequently alarmed: They suspect that the product is either broken or that it
is drawing a distressingly high amount of current from the wall outlet (akin to an AV receiver left in full
operational mode).
This is far from the truth. If the PowerQuest 707 EU was consuming that much current (or even 30% of that
level), it would need to dissipate the energy loss in heat. It would be quite warm (even hot) to the touch, just
like most power ampliers while in operation. In fact, the PowerQuest 707 EU runs cool, precisely because
this current reading is false. The circuit utilizes massive capacitive reactance across the AC line, which, akin
to a battery, will both absorb and immediately release the current several times per second. Further, when
incorporated with power supplies such as those found in power ampliers, the current readings actually
come down. This is due to what’s known as a vector load, and it’s quite dynamic in an audio/video system.
In this scenario, there is one thing that can run somewhat warmer than it might otherwise: the AC cord that
supplies power to the PowerQuest 707 EU. This is because the wiring and the circuit breaker that supply
power to PowerQuest 707 EU simply look at RMS current and do not distinguish between reactive loads,
resistive loads, or inductive loads, but your utility does.
This circuit and many like it have been utilized for many years, and, when tested into buildings with
absolutely no loads present aside from the transient power correction circuit, there was virtually zero power
draw from the utilities’ power meter. Still, in an age where so-called “smart meters” are omnipresent, and
some utilities may or may not change their standards for “what type of power or current is suitable for
billing,” we have gone to great lengths to oer an alternative to those who may be concerned, but who
nevertheless wish to achieve the best possible audio/video performance.
Overvoltage Protection Indicator
One portion of the PowerQuest 707 EU’s non-sacricial surge protection is dedicated to a fast-acting extreme
voltage shutdown circuit. If more than 270VAC is present on the incoming AC line for more than a quarter of a
second, the circuit will instantly open a high-current relay that will disengage the AC power from all the PowerQuest
707 EU’s AC outlets, activating the red front-panel LED “Overvoltage Protection” warning indicator. Once the event
has passed, or the building wiring fault has been corrected, the circuit will automatically re-engage.

9
Break-in Time | Continuous Use
The PowerQuest 707 EU is made of a variety of passive and active components. As such, the PowerQuest 707
EU will benet from continuous use, just like any other audio/video component. This is not to say that you
will be made to “suer” through weeks or months of intolerable performance until that “magic day” when the
parts are fully formed and ready. On the contrary, the PowerQuest 707 EU will perform very well from the rst
moment you use it. It will improve gradually, in small increments, over a period of approximately two weeks.
While leaving the PowerQuest 707 EU turned on during this period will aid the process, it is also perfectly
acceptable to turn the unit o; doing so will simply increase the time it takes to reach nal “break-in.”
The PowerQuest 707 EU has a 5-year warranty, but it was designed to last for over two decades. Provided
that the PowerQuest 707 EU is used inside a home, store, studio, or oce with a reasonable climate (7
degrees to 38 degrees Celsius, with less than 20% humidity), it can be left on continuously; there are no
parts that will wear out.

10
Specications
PowerQuest 707 EU
¡Surge Suppression: Non-sacricial (nothing to damage with repeated 6000V/3000A input
surge tests, which is the maximum that can survive through a building’s AC electrical panel).
¡Extreme Voltage Shutdown Voltage: 270VAC (will activate the main high-current relay to
open within less than 0.25 second; automatically resets once the incoming power is within
a safe range).
¡Dierential-Mode Noise Filtering: Well in excess of 22dB from 8kHz to 1GHz, linearized for
dynamic (rising) line impedance with frequency (source) and 10- to 50-ohm load,
system current dependent.
¡Common-Mode Noise Filtering: Well in excess of 22dB from 30kHz to 100MHz, linearized for
dynamic (rising) line impedance with frequency (source) and 10- to 50-ohm load,
system current dependent.
¡Maximum Input Current Capacity: 10 amps RMS
¡7 AC Outlets: 3 High-Current/Transient Power Correction; 4 Ultra-Linear Filtering.
¡Power Consumption: Typically, less than 0.5 amps at 220-240 VAC input, with all connected
components operational. (This is dependent on a reactive vector load. For more info, see
“Operation and Continuous Use: PowerQuest 707 EU Current Draw.”)
¡Dimensions: 43.0 cm W x 8.6 cm H (9.4 cm w/ feet attached) x 38.0 cm D (2-RU rack-mounting
ears are provided)
¡Weight: 7.6 Kg.
PowerQuest PQ-716 AC Power Cable (2m | 6’7”)
¡2.5 mm2 | 16A RMS capacity @ 220-240V 50Hz; NEMA male wall plug and IEC C-13
female connector
¡Semi-Solid Concentric Long-Grain Copper (LGC) Conductors
¡ZERO-Tech (No Characteristic Impedance) for uncompressed current transfer
¡RF/ND-Tech minimizes circuit misbehavior by cancelling induced RF noise
¡Direction-Controlled Conductors ensure induced noise is properly drained and dissipated

11
Trouble-Shooting Guide
At AudioQuest, we always appreciate hearing from you. However, if you have questions, problems, or
suspect that your PowerQuest 707 EU requires service, please start here.
There is no power to any of the AC outlets.
When the PowerQuest 707 EU’s front-panel LED power indicator glows green, the unit is operational. If the
Protection On indicator is not lit, consider the following:
• Is the upper portion of the front-panel rocker switch fully ush with the chassis?
• Is the input AC cord fully inserted into the PowerQuest 707 EU’s AC inlet?
• Is the input AC cord properly plugged into the wall AC service outlet?
• Is the wall’s AC outlet functioning properly?
Plug into the outlet another component, product, or lamp to verify that power is present, and that the
electrical panel’s circuit breaker has not tripped. If there are only one or two AC outlets that have no
output power, a component may be malfunctioning. Verify the AC output with a known simple device
such as a lamp.
There is no power to any of the AC outlets and the red front-panel Overvoltage
Protection indicator is lit.
This indicates that either there is more than 270VAC (+/-5V) present on the wall’s AC service outlet, or the
PowerQuest 707 EU’s protection circuit is mis-calibrated. The latter is quite rare. (This circuit is adjustable,
but it’s tested and retested before it leaves the factory, and it’s glued into place, so shipping will not aect
it.) Use an AC voltage meter to determine if your outlet has too much voltage to be safe for operation, or if
there is a wiring fault that is causing this to occur.
Once the power is brought into a safe range for operation (180VAC to 265 VAC), the PowerQuest 707 EU’s
protection circuit will automatically switch to operational mode and the green power indicator will light.
The main power rocker switch/circuit breaker tripped to the lower (o) position
while the system was playing.
You may have exceeded the maximum current capacity of the PowerQuest 707 EU. This should be rare, but
it may be possible. Typical power ampliers draw about one-third of their maximum current consumption at
220-240VAC, as listed in the product’s specications (typically found in their owner’s manual). This is further
complicated by the fact that the power consumption to all AC outlets (1 through 7), is a cumulative draw on
the maximum current capacity of 10 amps that will trip this power switch/magnetic circuit breaker.
The Transient Power Correction Circuit may also contribute to the overall draw seen by the circuit breaker.
Still, it should be rare that the total capacity is exceeded, but, given that some televisions, projectors, and
power ampliers can draw substantial current, it is certainly not impossible. If this is the case, an additional
PowerQuest 707 EU, and a discrete 16-amp AC service on the same phase of the electrical panel, will be
required for some or all the power ampliers.

12
A technician or electrician found that my PowerQuest 707 EU consumes over 3
amps of current. Is it broken?
No, it’s not broken, and it’s not drawing 3+ amps in any conventional sense. The PowerQuest 707 EU’s
Transient Power Correction Circuit creates a reactive current draw of as much as 3 to 4 amps RMS at idle,
and, when incorporated with power supplies such as those found in power ampliers, the current readings
decrease. This is a vector load, which will vary with the connected equipment. When plugged into an AC
service that has no other electrical draw, it is typical to see a real-world RMS power draw well below 60
watts at idle.
My home or grounds were hit by lightning. The PowerQuest 707 EU seems to be
functioning properly. Should it be sent in for inspection or service?
If you see or smell smoke coming from the unit, it needs service. Otherwise, if it functions after such an
event (which is very likely), there is nothing that would be compromised or damaged. If it fails after such an
event, it will fail totally. However, it’s unlikely that this would occur. The circuit is designed to easily handle
any voltage or current surge that could possibly make it past an electrical panel. The force required to
damage the PowerQuest 707 EU via a power surge would melt the panel and burn the building (in which
case, the PowerQuest 707 EU is the least of your worries).
How do I clean the chassis?
The PowerQuest 707 EU’s black-painted chassis and black anodized front panel can be cleaned with
AudioQuest CleanScreen, or a modest misting of household window cleaners. Please use soft cotton or
wool toweling to remove the liquid from the metal and painted surface. Never use alcohol or solvent-based
cleaners. They can damage the surfaces, paint, and silk-screening material.
I hear a slight buzzing sound coming from the PowerQuest 707 EU. Is it damaged?
No, it’s not damaged (or, at least, damage is very unlikely). If you’re in an extraordinarily quiet room and you
hear this faint buzzing sound only when in relatively close proximity to the PowerQuest 707 EU, or only when
you place your ear next to the unit, the buzzing is normal and, unfortunately, cannot be entirely eliminated.
What you are experiencing is a variation on the eect called magnetostriction. When an extraordinarily high
quantity of harmonic distortion is present on an AC line, a portion of the Transient Power Correction circuit
that is hermetically sealed and damped can mechanically buzz as its internal electrical plates resonate at 50
Hertz and many octaves above. In order to reduce or eliminate this harmonic distortion, the circuit is trying
to turn this distortion into heat. This has no eect on the performance or longevity of the PowerQuest 707
EU or its connected components.

13
Warranty
The Quest Group, DBA: AudioQuest, warrants to the original purchaser of this AudioQuest PowerQuest
707 EU, will be free from defects in material and workmanship for a period of one year. The purchaser of
the product is allowed 30 days from the date of purchase to complete the warranty registration online at
the AudioQuest website: https://www.audioquest.com/page/aq-product-registration.html. If the purchaser
completes the aforementioned registration, the warranty period will be increased to ve years from the date
of purchase.
If the product does not conform to this Limited Warranty during the warranty period (as herein above
specied), purchaser shall notify AudioQuest in writing (or e-mail), of the claimed defects. If the defects
are of such type and nature as to be covered by this warranty, AudioQuest shall authorize the purchaser
to return the product to the AudioQuest factory (2621 White Road, Irvine, California, 92614 USA). Warranty
claims should be accompanied by a copy of the original purchase invoice showing the purchase date; this is
not necessary if the Warranty Registration was completed by registering online at the AudioQuest website.
Shipping charges to the AudioQuest factory (Irvine, California, USA) must be prepaid by the purchaser of
the product. AudioQuest shall, at its own expense, furnish a replacement product or, at AudioQuest’s option,
repair the defective product. Return shipping charges back to the purchaser will be paid by AudioQuest.
All warranties contained herein are null and void if: the AudioQuest AC power product has been opened,
improperly installed, altered in any way, or tampered with. AudioQuest is not responsible for any connected
equipment or any claims of damage to connected equipment due to the occurrence of an AC power
surge, spike, or over-voltage event, unless AudioQuest determines after thorough inspection and testing by
AudioQuest (with product shipped to AudioQuest USA at the owner’s expense), that the protection circuitry
was in whole or in part improperly functioning. AudioQuest is not responsible for any connected equipment
that is damaged due to external signal lines (non-AC power lines), that carry an electrical storm or signal
wiring fault surge or spike (such as Ethernet, cable, and satellite connections). All AudioQuest AC power
products, must be plugged directly into a properly wired AC power line with a protective ground.
AudioQuest AC power products cannot be “daisy-chained” together in serial fashion with other AC power
strips, UPS devices, other AC surge protectors, AC power conditioners, three-to-two prong adapters, or
AC extension cords. Any such installation voids the warranty. The AudioQuest warranty only protects
against damage to properly connected equipment or AC cables where AudioQuest has determined, at its
sole discretion, that the damage resulted from an AudioQuest power product circuit or protection circuit
malfunction and does not protect against acts of God (other than lightning, such as ood or earthquake),
war, terrorism, vandalism, theft, normal use wear and tear, erosion, depletion, obsolescence, abuse, damage
due to low-voltage disturbances (i.e., brownouts or sags), or system equipment modication or alteration.
Do not use this product in any way with a generator, heater, sump pump, water-related devices, life-
support devices, medical devices, automobile, motorcycle, or golf-cart battery charger. To be used indoors
only and in dry areas. All warranties contained herein are null and void if used in any way with any of the
aforementioned devices.
THE FOREGOING IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. AudioQuest
does not warrant against damages or defects arising out of improper or abnormal use or handling of the
product, against defects or damages arising from improper installation, against defects in products or
components not manufactured by AudioQuest, or against damages resulting from such non-AudioQuest
made products or components. This warranty shall be cancelled by AudioQuest at its sole discretion if the
product is modied in any way without written authorization from AudioQuest. This warranty also does not
apply to products upon which repairs have been aected or attempted by persons other than pursuant to
written authorized by AudioQuest.

14
THIS WARRANTY IS EXCLUSIVE. The sole and exclusive obligation of AudioQuest shall be to repair or replace
the defective product in the manner and for the period provided above. AudioQuest shall not have any other
obligation with respect to this product or any part thereof, whether based on contract, tort, strict liability, or
otherwise. Under no circumstances, whether based on this Limited Warranty or otherwise, shall AudioQuest
be liable for incidental, special, or consequential damages. AudioQuest employees or representatives’ ORAL
OR WRITTEN STATEMENTS DO NOT CONSTITUTE WARRANTIES, shall not be relied upon by purchaser, and are
not a part of the contract for sale or this Limited Warranty. This Limited Warranty states the entire obligations
of AudioQuest with respect to the product. If any part of this Limited Warranty is determined to be void or
illegal, the remainder shall remain in full force and eect.
Warranty claims should be accompanied by a copy of the original purchase invoice showing the date of
purchase. (If the product was registered online, this is not necessary.) Before returning any equipment for
repair, please be sure it is adequately packed and cushioned in either the original or a new AudioQuest
factory-supplied polybag, foam insert pair, and dual carton set to protect against damage in shipment, and
that it is insured.

15
Caractéristiques du PowerQuest 707 EU 16
Introduction 16
Installation/déballage 18
Déballage 18
Informations/avertissements sur la sécurité 18
Service/Retour à AudioQuest 18
Source d’alimentation 18
Placement 18
Connexion aux composants audio/vidéo 19
Acheminement des câbles d’alimentation 19
Prises à courant élevé/faible impédance 19
Prises électriques ltrées ultra-linéaires 20
Connexions CA suggérées 20
Fonctionnement et utilisation en continu 21
Interrupteur électrique/disjoncteur et indicateur d’alimentation à LED 21
Consommation de courant du PowerQuest 707 EU 21
Indicateur de protection contre les surtensions 21
Durée de rodage/utilisation continue 22
Spécications 23
Guide de dépannage 24
Garantie 26
FRANÇAIS

16
Caractéristiques du PowerQuest 707 EU
¡Correction de puissance transitoire de crête 45 ampères (jusqu’à 25 mS)
¡Filtre diérentiel ultra-linéaire : 8 kHz – 1 GHz (bien au-delà de 22 dB)
¡Filtre ultra-linéaire en mode commun : 30 kHz – 100 MHz (bien au-delà de 22 dB)
¡Les deux ltres sont linéarisés pour une impédance de ligne (croissante) présentant une fréquence
de 0,05 ohms (source) et une charge de 10 à 50 ohms (en fonction du courant du système)
¡Suppression de surtension non sacricielle (résistera à de multiples pics de 6000 V ou 3000 A
sans dommages)
¡Arrêt en cas de tension extrême : 270 VCA. Active le relais du circuit principal en moins de
0,25 seconde. Réinitialisation automatique lorsque la tension entrante se situe dans une plage
de sécurité
¡(3) Prises à courant élevé conformes aux spécications; (4) Prises à source ltrée ultra-linéaires
¡Cordon CA détachable PowerQuest PQ-716 de 2 mètres avec ZERO-Tech et RF/ND-Tech
¡Interrupteur électrique /disjoncteur magnétique à très faible impédance
¡Capacité maximale du courant d’entrée : 10 A RMS
¡Châssis métallique montable en rack 2U (adaptateurs de rack inclus)
Introduction
La science du courant alternatif n’est pas un sujet facile ; elle exige une concentration particulière et un souci
extrême du détail. En fait, l’augmentation phénoménale des signaux radio transmis par voie aérienne et dans
la ligne CA, combinée à des lignes des services publics surtaxées et aux demandes toujours croissantes en
composants audio/vidéo haute dénition, a fait de l’électricité CA de nos installations des services publics
une technologie obsolète.
Dans le cas du courant alternatif (CA), nous nous appuyons sur une technologie vieille de plusieurs siècles,
créée pour les lampes à incandescence et les moteurs électriques, qui n’a certainement jamais été conçue pour
alimenter les circuits analogiques et numériques sophistiqués utilisés dans les systèmes audio/vidéo haut de
gamme. Pour répondre correctement aux promesses de la bande passante et de la plage dynamique sans cesse
croissantes d’aujourd’hui, nous devons parvenir à un niveau de bruit extraordinairement faible sur une large
plage de fréquences.
De plus, les amplicateurs de puissance actuels sont taxés pour la demande instantanée en courant de crête,
même lorsqu’ils sont alimentés à des volumes modestes. Bien que nous ayons constaté une hausse substantielle
de la dynamique et du contenu des basses dans nos logiciels audio, les haut-parleurs que nous utilisons pour les
reproduire ne sont pas plus ecaces qu’il y a deux à quatre décennies. Cela impose des contraintes importantes
à l’alimentation électrique d’un amplicateur, ainsi qu’à la source de courant alternatif qui l’alimente.
Les composants sensibles de nos systèmes ont besoin d’un courant alternatif de meilleure qualité, un problème
qui a donné naissance à une multitude de systèmes de conditionneurs d’alimentation CA, de transformateurs
d’isolation, d’amplicateurs de régénération et de de systèmes de secours à batterie. Grâce à des tests
d’échantillons diérentiels et à une analyse spectrale, il peut être prouvé que, jusqu’à un tiers, un signal audio
haute résolution (bas niveau) peut être perdu, masqué ou fortement déformé par les énormes niveaux de bruit
circulant le long des lignes électriques CA qui alimentent nos composants. Ce bruit se propage dans le circuit
du signal sous forme de bruit de courant et par le biais de la mise à terre CA, déformant et/ou masquant en
permanence le signal source.
Toutes les tentatives sincères pour résoudre ce problème doivent être applaudies car une fois que le signal
audio/vidéo est parti, il est parti pour toujours...

17
Pour AudioQuest, le respect de la source ne se réduit jamais à simplement utiliser des « pièces supérieures de
qualité audiophile » ni à dépendre d’une technologie exclusive (des approches courantes sur le marché de la
haute délité). Depuis des années, nous avons tous assisté aux mêmes débats sans n entre audiophiles : Lampes
ou transistors. Analogique ou numérique. Les câbles peuvent-ils vraiment faire une diérence ? Ces discussions
n’en nissent pas. Si nous pouvons, nous aussi, nous vanter de nos nombreuses technologies uniques, nous
réalisons que la véritable optimisation audio/vidéo n’est jamais l’aaire d’un circuit secret ou exotique. Lorsqu’il
s’agit de dissiper le bruit du courant alternatif, plusieurs approches peuvent donner des résultats signicatifs.
Toutefois, il est également possible de transmettre des tintements, des compressions de courant et des
distorsions non linéaires qui sont pires que le problème initial.
PowerQuest 707 EU utilise le circuit de dissipation du bruit à bande passante linéarisée le plus large de sa
catégorie. Notre circuit unique de correction de puissance transitoire passif/actif présente une réserve de courant
instantanée de plus de 45 ampères de crête, spécialement conçue pour les amplicateurs de puissance modernes
qui ont des grandes demande en courant. La plupart des produits électriques CA dotés de « prises à courant élevé
» se contentent simplement de minimiser la compression du courant; PowerQuest 707 EU la corrige.
S’il est facile de se vanter, c’est une autre chose de créer une solution qui soit uniforme, globale, fonctionnelle
et scientiquement vériable. Il ne sut pas de réduire le bruit de la ligne CA et les distorsions associées à une
seule octave, laissant les octaves et portions d’octaves voisines vulnérables au bruit, aux pics de résonance ou
à une réduction insusante du bruit. L’uniformité est essentielle. On ne devrait jamais accepter une résolution
supérieure sur une octave, si c’est pour sourir d’eets de masquage à une demi-octave de là et d’artéfacts de
résonance deux octaves plus loin. C’est là le principal critère d’AudioQuest pour son système de dissipation de
bruit d’alimentation à basse impédance.
PowerQuest 707 EU représente plus de 25 années de recherche approfondie et de produits électriques CA
à l’ecacité éprouvée, conçus pour les audiophiles, les ingénieurs de diusion et les applications audio
professionnelles. Nous vous invitons à faire l’expérience de PowerQuest 707 EU et à découvrir par vous-même les
résultats remarquables d’une gestion électrique hautement optimisée.
—Garth Powell, directeur en chef de l’ingénierie, AudioQuest

18
Installation | déballage
Avant de déballer votre PowerQuest 707 EU, inspectez le carton pour voir si les boîtes et les matériaux de
protection internes n’ont pas subi de dommages évidents. Si des dommages internes sont probables, contactez
le transporteur qui a livré l’unité. Si les dommages dus à l’expédition sont évidents sur le produit, veuillez
contacter votre transporteur. Veuillez conserver tous les matériaux d’expédition et d’emballage. Si vous devez
déplacer votre PowerQuest 707 EU ou le transporter, ces matériaux d’emballage assureront un transport en toute
sécurité. Le carton doit contenir PowerQuest 707 EU (Prises d’alimentation Schuko 220-240V UE), deux inserts en
mousse, le manuel de l’utilisateur, un kit de montage sur rack et un câble électrique CA PowerQuest PQ-716 de
2 m. Il est recommandé d’enregistrer le produit. En cas de perte de vos documents de propriété originaux, votre
enregistrement peut être utilisé pour déterminer si l’unité est dans la période de garantie.
Informations | avertissements sur la sécurité
Avant d’utiliser le PowerQuest 707 EU, veuillez lire et respecter toutes les consignes de sécurité et d’utilisation.
Conservez ces instructions pour une référence future.
¡Ne désassemblez pas et ne modiez le PowerQuest 707 EU de quelque manière que ce soit.
L’appareil ne contient aucune pièce devant être entretenue par l’utilisateur.
¡Garder au sec et évitez une humidité excessive.
¡Ne laisser aucun liquide ni d’autres corps étrangers pénétrer dans l’appareil.
Service | retour à AudioQuest
L’entretien de PowerQuest 707 EU doit être eectué par AudioQuest, et n’est requis que dans les cas suivants :
¡PowerQuest 707 EU a été exposé à de la pluie, à des inondations ou à une humidité extrême.
¡PowerQuest 707 EU ne semble pas fonctionner normalement. (consulter le « Guide de dépannage »)
¡PowerQuest 707 EU est tombé et a subi des dommages physiques considérables.
Lors du renvoi du PowerQuest 707 EU à AudioQuest pour réparation (ou de son expédition pour toute autre
raison), veiller à utiliser les matériaux d’emballage homologués par le fabricant. Si certains manquent (carton
d’emballage double, deux inserts en mousse, un sac en polyéthylène), obtenir leur remplacement auprès
d’AudioQuest. Nous proposons des matériaux d’emballage à un prix nominal ; les frais d’expédition seront payés
par la personne ou l’entreprise qui commande les matériaux d’emballage. Ne pas recourir à d’autres méthodes
d’emballage, notamment à celles fournies ou suggérées par les compagnies d’emballage ou transport de colis.
Ces méthodes et matériaux peuvent gravement endommager le produit et sa nition. Même la perte du sac en
polyéthylène épais sut à causer des dommages permanents de la nition pendant le transport. Si les matériaux
d’emballage d’origine sont perdus, veiller à obtenir des emballages de rechange auprès d’AudioQuest.
Source d’alimentation
Idéalement, la source électrique à laquelle PowerQuest 707 EU est connecté doit être susante pour une utilisation à
une tension nominale monophasée de 220-240 V et de 10 ampères (capacité de courant RMS ou supérieure).
Pour fonctionner correctement, PowerQuest 707 EU nécessite une mise à la terre de sécurité (fournie par la prise
murale du service d’alimentation).
Placement
PowerQuest 707 EU comporte quatre pieds en polymère à caoutchouc texturé permettant un placement en
toute sécurité sur toute table, armoire, étagère ou plancher. Lorsque le montage en rack est nécessaire, ces pieds
peuvent être retirés à l’aide d’un tournevis Phillips standard. Le placement ou la proximité des autres éléments ne
sont pas d’une importance particulière et, sous une utilisation normale, le PowerQuest 707 EUne dégage aucune
chaleur notable. PowerQuest 707 EU peut être monté en rack dans une étagère standard de 19” en xant les
adaptateurs de rack 2U inclus. Pour xer les adaptateurs de rack optionnels sur le châssis de PowerQuest 707 EU,

19
retirez d’abord les trois vis Phillips à tête plate de la partie avant des deux côtés gauche et droit de l’assemblage
du couvercle. Ensuite, montez les adaptateurs du rack à plat contre l’arrière du panneau avant de PowerQuest
707 EU. Enn, xez les adaptateurs du rack en place en installant les vis Phillips à tête cylindrique du kit de
montage sur rack.
Lorsque des installations dans des espaces exigus ne permettent pas de disposer d’un espace susant dans
un rack, une étagère ou une armoire, PowerQuest 707 EU peut être placé sur le côté. Ce positionnement ne
compromettra pas la sécurité ou les performances, mais nous recommandons de placer une serviette ou un tapis
doux sous l’unité pour éviter que le châssis et le panneau avant ne soient rayés ou abimés de quelque manière
que ce soit.
Connexion aux composants audio/vidéo
Acheminement des câbles d’alimentation
Une fois le PowerQuest 707 EU en place, un câble électrique CA à courant élevé de 10 ampères (ou plus) doit être
raccordé au connecteur d’entrée CA du panneau arrière (IEC-C14). Le câble électrique CA doit être équipé d’un
connecteur femelle IEC-C13 et d’une prise mâle 220-240 VCA EU/Schuko avec mise à la terre pour une utilisation.
Nous recommandons vivement l’utilisation du câble électrique CA PowerQuest fourni ou de tout autre câble
électrique CA AudioQuest des séries « NRG-Z », « Wind » ou « High-Current Storm ».
Face au panneau arrière de PowerQuest 707 EU, l’entrée IEC-C14 se trouve sur le côté inférieur gauche de l’unité. Le
câble électrique CA doit être connecté à une prise CA appropriée (voir « Source d’alimentation »).
Dans la mesure du possible, il est préférable de laisser au moins env. 7 cm entre les câbles CA et n’importe
quel câble de signal. Lorsque cela n’est pas possible dans un agencement pratique du câblage du système, le
croisement des câbles CA et des câbles de signal à 90 degrés est le meilleur moyen de minimiser les bruits induits.
Prises à courant élevé | faible impédance
L’unité dispose de trois prises électriques à courant élevé/faible impédance (numérotées « 1 » à « 3 » – trois prises
discrètes au total). Ces prises sont dotées de notre technologie de correction de puissance transitoire (45 ampères
de crête – jusqu’à 25 mS) et sont conçues pour améliorer les performances des amplicateurs de puissance
via notre circuit de réserve de courant transitoire à faible impédance. Les amplicateurs de puissance, les
amplicateurs monoblocs, les amplicateurs intégrés, les récepteurs alimentés ou les caissons de base alimentés
doivent être connectés à ces deux prises.
Quelle que soit la classe de fonctionnement ou la topologie du circuit (à lampes, à semi-conducteurs, numérique
ou autre), le circuit de correction de puissance transitoire ne comprime pas le courant des amplicateurs de
puissance quels qu’ils soient. Au contraire, il améliore les performances de l’amplicateur en fournissant la source
électrique à faible impédance dont l’alimentation électrique de l’amplicateur a si désespérément besoin.
Toutefois, les trois autres prises CA (ltrage du bruit ultra-linéaire), ne sont pas optimisées pour la plupart des
amplicateurs de puissance. Elles ont été optimisées pour les préamplicateurs audio de niveau ligne, les DAC, les
lecteurs universels, les platines vinyles et les produits vidéo qui utilisent des circuits d’amplication de tension à
courant constant. Ces circuits ne sourent jamais de compression de courant, mais leur niveau d’entrée plus faible
et leur gain plus élevé nécessitent une solution plus robuste pour la dissipation du bruit. C’est la clé des blocs
d’alimentation CA discrètes de PowerQuest 707 EU, dans lesquelles chaque circuit n’est pas traité de la même
manière, mais plutôt isolé batterie par batterie et optimisé pour obtenir les meilleures performances.

20
Prises électriques ltrées ultra-linéaires
Il existe quatre prises (4 prises discrètes en tout, numérotées « 4 » à « 7 ») qui utilisent cette technologie dans
le PowerQuest 707 EU. Les huit prises sont à leur tour isolées des prises à courant élevé/faible impédance,
numérotées de 1 à 4. C’est très avantageux pour le contrôle des interactions complexes des fréquences radio et
autres bruits induits présents dans le courant alternatif des services publics, le contrôle du bruit qui sera présent
sur et dans chaque câble CA et le contrôle du bruit généré à l’intérieur des composants du système qui « reue »
dans les circuits de sortie de PowerQuest 707 EU.
Il serait facile de recommander de placer les composants numériques ou vidéo dans les prises 4, 5 et les
composants audio de niveau ligne et les tables tournantes dans les prises 6 et 7 mais la recherche d’une
performance optimale est plus complexe. Cette stratégie fonctionnera, voire même bien, mais une certaine
expérimentation est préconisée, sachant qu’aucun ltre ne peut éliminer 100 % de tous les bruits. Bon nombre
de ces formes d’ondes induites par les fréquences radio possède des ondes sinusoïdales aussi petites que le bord
d’un morceau de papier, et les interactions sont complexes. Tant que les amplicateurs de puissance sont branchés
dans les bonnes prises (1 à 3) et que les autres composants sont dans les prises 4 à 7, vous devriez bénécier de
performances exemplaires.
Connexions CA suggérées
16 Amp
Rated
AC Cord
Phono Amp
Cable / Sat Box DAC
Switcher
Line-Level Pre Amp
Mono Block
Amplicateur
stéréo
Phono Amp
Cable / Sat Box DAC
Switcher
Line-Level Pre Amp
Mono Block
Préamplicateur
phono
Phono Amp
Cable / Sat Box DAC
Switcher
Line-Level Pre Amp
Mono Block
DAC/
Lecteur
Réseau
Phono Amp
Cable / Sat Box DAC
Switcher
Line-Level Pre Amp
Mono Block
Préamplicateur
de niveau
ligne
Phono Amp
Cable / Sat Box DAC
Switcher
Line-Level Pre Amp
Mono Block
Commutateur de
Réseau
Phono Amp
Cable / Sat Box DAC
Switcher
Line-Level Pre Amp
Mono Block
Haut-parleur
alimenté
Phono Amp
Cable / Sat Box DAC
Switcher
Line-Level Pre Amp
Mono Block
Caisson de
basses
Phono Amp
Cable / Sat Box DAC
Switcher
Line-Level Pre Amp
Mono Block
Remarque : les prises 4 à 7 sont soumises à de nombreuses variables et conditions de circuit, l’expérimentation
est donc encouragée pour obtenir les meilleurs résultats possibles. Les amplicateurs de puissance
doivent être connectés aux prises 1 à 3.