Woo Audio WES User manual

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WOO AUDIO WES
Electrostatic Amplifier
Fully Balanced Class-A Stereo Headphone Amplifier
Owner’s Manual
Please review this manual before operating your WOO AUDIO™ product.

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Important Safety Information
CAUTION: These amplifiers are shipped without the vacuum
tubes installed. It is necessary to install the tubes first. The tubes
must be installed correctly or serious damage that is not covered
by the warranty will result.
Turn off immediately in the event of malfunction
Should you notice smoke or an unusual smell coming from the
equipments, turn it off immediately. Continued operation could
result in injury.
Do not disassemble
High voltage circuit. Touching the product’s internal parts could
result in injury. In the event of malfunction, the product should be
repaired only by a qualified technician.
Keep out of children
Failure to observe this precaution could result in injury
WARNING: Failure to follow these instructions could result in
fire, electric shock, or other injury or damage.

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Table of Contents
IMPORTANT SAFETY INFORMATION 2
TABLE OF CONTENTS 3
OVERVIEW 4
QUICK INSTALLATION 5
OPERATION 11
COMPATIBLE TUBES 13
FAQ - FREQUENTLY ASKED QUESTIONS 14
WARRANTY AND SERVICE 15
REVIEWS 16
PRODUCT SPECIFICATION 17

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Overview
Thank you for choosing a Woo Audio product. The WES is finely hand-crafted amplifier
that delivers uncompromised performance and superior listening experience.
Point-to-Point Wiring
Four EL34 power tubes
Four 6SL7 drive tubes
Two 5AR4 rectifier tube. Direct substitute: 5U4GB
Two 12AU7 phase splitter - unbalanced to balanced input conversion
Two selectable balanced inputs
One selectable unbalanced input
One 5-pin pro bias Stax output
One Sennheiser HE-90 output
DACT CT4 24-way stepped attenuator
Auricap capacitors for inter-stage and output coupling
Telfon tube sockets

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Quick Installation
What’s in the box?
①WES Amplifier unit (AMP)
AMP accessories and tubes diagram:
②AluminumPhase splitter tube shields, 2 units

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③Aluminum Cone feet dish with rubber pad, 4 units
④Aluminum Cone feet, 4 units
⑤Aluminum Panel screw, 2 units
⑥AluminumPanel screw filler, 2 units
⑦AluminumPanel L-shaped holder, 2 units
⑧Stainlesssteel L-shaped holder screws, 2 units
⑨Acrylic panel (long), 1 unit
⑩12AU7tube(phasesplitter),2units
⑪6SL7tube(driver),4units
⑫EL34tube(power),4units
⑬5AR4tube(rectifier,2units
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The actual tubes may look different.
Compatible tubes may be included instead of the ones illustrated above.
Power cord and interconnection cable are not included.
PSU accessories diagram
⑭WESPowerSupplyunit(PSU)
⑮Aluminum Cone feet dish with rubber pad, 4 units
⑯Aluminum Cone feet, 4 units
⑰Aluminum Panel screw, 2 units
⑱AluminumPanel screw filler, 2 units
⑲Acrylic panel (short), 1 unit
⑳DC power cord - connecting the AMP and PSU
The AMP and PSU have the same aluminum Cone feet dishes, feet, panel screws, and
panel fillers. They are labeling differently for illustration purpose.

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Installing the feet and plates:
Installing the tubes:
Install these tubes on the AMP unit: 6SL7, EL34, 12AU7 (optional).
Install these tubes on the PSU unit: 5AR4.
Note: avoid oil or smudge on the tube glass, clean hands before installation.
1. Find the correct tube for the socket. There is a label below each tube socket that
indicates a standard tube for the amplifier. For example, a 6SL7 tube should
install on the “6SL7” labeled socket. You MUST use the compatible tube or
serious damage may occur to the amplifier. See Compatible Tube section for all
the approved direct substitute tubes.
2. Align the tube guide pin to the socket as below.
3. Hold the tube base firmly then squeeze it into the socket slowly. Be sure to apply
force perpendicular to the tube socket; never insert the tube at an angle. Apply
slight rocking motion the tube, which is harder to insert; never apply circular
motion. Apply pressure from the top of the tube if needed.
Tube socket guide pin indicator
Guide pin shows on the
bottom of a tube.
Screw all cone feet
into threaded holes
Put the
AMP and
PSU upside
down on a
soft and
clean
surface
Place the dish under the
feet
Place the dish on PSU
Carefully
place the
AMP on
the PSU

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.4. Check installation. The tube pins should be inserted fully into the tube socket
receptacles.
Selecting AC voltage:
WARNING: failure to select the correct voltage will result in damage of the amp.
Installing the power cord:
Plug the power cord into the AC inlet. See ①in the below diagram. The AC inlet socket is a
standard IEC type. You will need to obtain the correct type for your region.
Do not insert a tube at an
angle
Insert a tube perpendicular to
the socket.
Hold base firmly.



U.S.
European
U.K.
Switch to label “115” for
AC100 to 125V voltage.
Switch to label “230” for
AC210 to 240V voltage.


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Back panel diagram:
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①DC input connector
②Phase splitter tube sockets
③RCA connectors
④XLR connectors
⑤AC input connector
⑥AC voltage switch
⑦DC output connector
Installing the DC cord:
NOTE: Both ends of the cord have the same plug. The plug can be inserted into either
the input or the output.
Align the plug’s orientation mark to the socket. Once aligned, the plug can be inserted
slightly into the socket.

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Installing the source input:
Plug the RCA interconnection cable into the RCA connectors; see ③in the above diagram. Or,
plug the XLR interconnection cable into the XLR connectors; see ④in the below diagram.
Installing the phase splitter tube shield:
NOTE: This installation is optional if you do not use the RCA input.
1. Install the 12AU7 tube into the socket ②
2. Screw the tube shield clockwise into the ring of the socket.
Installing the acrylic panel on the AMP:
Installing the acrylic panel on the PSU:
Similar to the last 2 steps above.
Slightly push the plug inward
Turn the ring clockwise
until you hear a click sound
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

There are 2 holes
near the faceplate on
the top of the AMP
unit. One is threaded
and the other is
clear.
Put the stainless
steel screw on
the threaded
hole.
Secure the
screw.
Put the panel
filler into the
panel
Put the panel
screw through
the filler then
secure it.