Woo Audio WA6 User manual
June10,2011©2011WOOAUDIOtmInc.All
rightsreserved.
www.wooaudio.comRev1.0.June10,2011.1
WOO AUDIO WA6
Single-Ended Class-A Stereo Headphone Amplifier
Owner’s Manual
Please review this manual before operating your WOO AUDIO™ product.
June10,2011©2011WOOAUDIOtmInc.All
rightsreserved.
www.wooaudio.comRev1.0.June10,2011.2
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.
June10,2011©2011WOOAUDIOtmInc.All
rightsreserved.
www.wooaudio.comRev1.0.June10,2011.3
Table of Contents
IMPORTANT SAFETY INFORMATION 2
TABLE OF CONTENTS 3
OVERVIEW 4
QUICK INSTALLATION 5
OPERATION 9
COMPATIBLE TUBES 11
FAQ - FREQUENTLY ASKED QUESTIONS 12
WARRANTY AND SERVICE 13
REVIEWS 14
PRODUCT SPECIFICATION 15
June10,2011©2011WOOAUDIOtmInc.All
rightsreserved.
www.wooaudio.comRev1.0.June10,2011.4
Overview
Thank you for choosing a Woo Audio product. The WA6 is finely hand-crafted amplifier
that delivers uncompromised performance and superior listening experience.
Point-to-Point wiring
One 5AR4 rectifier tube. Direct substitute: 5U4G
Two 6DE7 drive/power tubes
Pseudo-dual power supply
All tubes. No semi-conductors in the entire circuitry
High or low headphone impedance switch
One TRS ( ¼") headphone jack
80 watts specially made toroidal power transformer.
Full aluminum die-cast chassis, anodized finish
Whole aluminum volume knob and power switch button
Custom gold-plate RCA
Alps potentiometer and power switch
Dale and Vishay high precision resistors
Silver plated Teflon hook-up wires
June10,2011©2011WOOAUDIOtmInc.All
rightsreserved.
www.wooaudio.comRev1.0.June10,2011.5
Quick Installation
What’s in the box?
①WA6 amplifier
②One 5AR4 rectifier tube
③One matched pair of 6DE7 power tubes
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.
June10,2011©2011WOOAUDIOtmInc.All
rightsreserved.
www.wooaudio.comRev1.0.June10,2011.6
Installing the rectifier tube:
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 5AR4 tube should
install on the socket labeled “5AR4”. 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 for the tube, which is harder to insert; never apply circular
motion. Apply pressure from top of the tube if needed.
Tube socket guide pin indicator
Guide pin shows on the
bottom of a tube.
Do no insert a tube at an angle
Insert a tube perpendicular to
the socket.
Hold base firmly.
June10,2011©2011WOOAUDIOtmInc.All
rightsreserved.
www.wooaudio.comRev1.0.June10,2011.7
.
4. Check installation. The tube pins should be inserted fully into the tube socket
receptacles.
Installing the driver/power tubes:
Selecting AC voltage:
WARNING: failure to select the correct voltage will result in damage of the amp.
Switch to label “115” for
AC100 to 125V voltage.
Switch to label “230” for
AC210 to 240V voltage.
Insert the tube perpendicular
to the socket
Use both hands if needed
Bottom of the tube
Align the 6DE7 to the socket
June10,2011©2011WOOAUDIOtmInc.All
rightsreserved.
www.wooaudio.comRev1.0.June10,2011.8
Installing the power cord:
Plug the power cord into the AC inlet. See ②in the below diagram. The AC inlet socket is a
standard IEC type. You will need to obtain the correct type for your region.
Installing the source input:
Plug the RCA interconnection cable into the RCA connectors ③.
Back panel diagram:
①Voltage selection switch
②AC inlet
③Impedance selector
④RCA input
U.S.
European
U.K.
June10,2011©2011WOOAUDIOtmInc.All
rightsreserved.
www.wooaudio.comRev1.0.June10,2011.9
Operation
DO NOT
oTurn on the amp before properly installing ALL tubes.
oUse tubes that are not approved by Woo Audio.
oTurn on the equipment without checking the correct AC voltage setting.
oRemove any tubes or the DC cord while the amp is operating
oTouch tubes (extremely hot) after warm-up.
oLeave the amps running unattended. To use the amps safely, please allow it to
cool down for every 8 hours of continuous play time.
DO
oPlace the amp away from any wireless or frequency-emitting devices such as
mobile phones, PDAs and radios, to avoid noise interference.
oKeep away from water or excessive moisture.
oTurn off the amp if its sound is abnormal.
oAllow a minimum of 2 inches of air clearance for heat dissipation.
oAllow approximately 5 minutes of warm-up.
oAllow the tubes to cool down before replacing them.
June10,2011©2011WOOAUDIOtmInc.All
rightsreserved.
www.wooaudio.comRev1.0.June10,2011.10
Turning the amplifier on:
1. Turn the volume knob to the lowest position.
2. Insert a headphone into headphone output ①.
3. Press the power switch ③to a locking position. The power LED will light.
4. Observe that all tubes light gradually.
5. Let the tubes warm up for at least 1 minute before turning up the volume.
Front panel diagram:
①Headphone output
②Volume control
③Power switch
④PowerLED indicator
Break-in period:
It is recommended to allow the amplifier to operate 150+ hours so that peak performance can be
realized. An effective way to break-in the amp is to run the amp normally with music playing.
Please do not leave the amp running continuously.
June10,2011©2011WOOAUDIOtmInc.All
rightsreserved.
www.wooaudio.comRev1.0.June10,2011.11
Compatible Tubes
Model#AdapterNote
Driver/Power
6DE7*No
6CY7NoWA6‐SEshippedpriorApril17,2010isnotcompatible.
6EW7No
6EM7YesA8‐pinto9‐pinadapterisneeded.
6DR7NoWA6‐SEshippedpriorApril17,2010isnotcompatible.
6DN7YesA8‐pinto9‐pinadapterisneeded.
6FD7NoWA6‐SEshippedpriorApril17,2010isnotcompatible.
6SN7YesForWA6only.A8‐pinto9‐pinadapterisneeded.
5692YesForWA6only.A8‐pinto9‐pinadapterisneeded.
6DE7*No
6CY7NoWA6‐SEshippedpriorApril17,2010isnotcompatible.
6EW7No
6EM7YesA8‐pinto9‐pinadapterisneeded.
6DR7NoWA6‐SEshippedpriorApril17,2010isnotcompatible.
6DN7YesA8‐pinto9‐pinadapterisneeded.
6FD7NoWA6‐SEshippedpriorApril17,2010isnotcompatible.
6SN7YesForWA6only.A8‐pinto9‐pinadapterisneeded.
5692YesForWA6only.A8‐pinto9‐pinadapterisneeded.
Rectifier
5U4G*/BNoDirectlyHeated
274AYes DirectlyHeated,a4‐pinto8‐pinadapterisneeded.
274BNoDirectlyHeated
53KUNoDirectlyHeated
5AR4NoIndirectlyHeated
5AS4NoDirectlyHeated
5Z4NoIndirectlyHeated
5R4/GA/GB/GY NoDirectlyHeated
5U3CNoDirectlyHeated
5V4/G/GANoDirectlyHeated
5Y3NoDirectlyHeated
5Z3YesDirectlyHeated,a8‐pinto8‐pinadapterisneeded.
GZ30NoIndirectlyHeated
GZ32/33/34NoIndirectlyHeated
GZ37NoIndirectlyHeated
CV378NoIndirectlyHeated
U52NoIndirectlyHeated
U54NoDirectlyHeated
* The most current chart can be found in this document:
http://tinyurl.com/4wbv5qn
June10,2011©2011WOOAUDIOtmInc.All
rightsreserved.
www.wooaudio.comRev1.0.June10,2011.12
FAQ - Frequently Asked Questions
Can I change headphone while the amp is on?
Yes, but you must first to turn the volume to the lowest position.
Can I flip the impedance switch while the amp is on?
Yes, it will not have any negative effect to the amp.
No sound is coming out of the headphone.
oCheck that all tubes are properly installed.
oCheck that the source is properly installed and is working fine.
oCheck that the source switch is on the correct position.
oCheck headphone connection.
There is noticeable noise coming from the headphone.
oRemove all sources from the amp to check if the noise disappears. If it does, the
noise is coming from the source.
oPlace the amp away from other electronic devices to check whether those were
causing the noise.
oPlace the amp in a different location to check if the noise is coming from the AC
line.
oRemove all tubes, clean tube pins, and then reinstall them again.
oReplace some or all tubes.
The sound is abnormal or distorted.
Replace tubes to see if they have deteriorated.
The LED and the tubes do not light.
Check if the fuse is burnt. See the following on how to replace a fuse. You will need a 2
or 3A, slo-blo type.
Insert a small flat
screwdriver into
the fuse door
which located on
the AC inlet.
Release the fuse
door by pulling it
out.
The fuse holder is
released from the
AC inlet.
The fuse is held by
a clip.
June10,2011©2011WOOAUDIOtmInc.All
rightsreserved.
www.wooaudio.comRev1.0.June10,2011.13
Warranty and Service
Woo Audio warrants this product free from defects in materials and workmanship for 1
year from the original date of purchase. The tubes are warranted for 30 days unless
otherwise stated. In the event that your Woo Audio product requires servicing, please
contact us directly to get a return instruction. If the equipment needs to be shipped back,
please use the original packaging and include a copy of the sales purchase along with a
detailed explanation of the problem(s).
Send service inquiry to wooaudio@gmail.com
Any modification not authorized by WOO AUDIO will void this warranty.
June10,2011©2011WOOAUDIOtmInc.All
rightsreserved.
www.wooaudio.comRev1.0.June10,2011.14
Reviews
"With a creamy, natural sound and tight bass response, along with pro-grade build
quality to match, we're sure any serious music lover would enjoy this fabulous piece of
audio bliss." - Unplggd Test Lab
"WooAudio has one of the prettiest and slickest build quality that you can find in the
industry. Everything from the hairline finishing, the lines, the knobs, the transformer
housing, all the way to the back panel, you find nothing but top quality workmanship."
- Headfonia
"It was almost magical the way the Woo WA6 made every recording sound better than
I thought it was. – The AudioPhiliac CNET
The WA6 offer great sound and great value!" - Tone Audio, issue 8
"Awesome! Amazing sound! I know I use these heavy words now and I promised
myself I wouldn't as I do not get excited very easily and I did not want to cause a stir
with this review and then make people have high expectations. But I do think the sound
is indeed awesome." - George Chronis@Head-fi
"I never really knew how good the HD-600's could sound until hearing them through
the WA6. Anyone that says the HD-600's are dark or veiled hasn't tried the correct
headphone." - Rad212@Head-Fi
"The soundstage or spatial placement of sound is excellent, but in my opinion this is
also dependant on the music, recording quality and headphones used. Overall clarity is
excellent, it sounds natural and the sound is clean/undistorted without a morsel of off
sound or graininess." - WalkGood@Head-Fi
June10,2011©2011WOOAUDIOtmInc.All
rightsreserved.
www.wooaudio.comRev1.0.June10,2011.15
Product Specification
Model: WA6
Headphones Impedance: 8-600 Ohms
Input Impedance: 100 Kilo-Ohms
Frequency Response: 20 Hz - 30 KHz, -3dB
Power Output: 580mW @32Ω
550mW @60Ω
590mW @120Ω
460mW @300Ω
400mW @600Ω(with 6DR7 tube)
Signal/Noise: 93 dB
THD: <= 0.3%
Voltage: AC 110/220 - 240V, 50/60 Hz, selectable
External Dimension, end to end
measurement, same for both units:
6" (H) x 5.5 (W) x 13" (D)
Weight: 13.5 pounds
Woo Audio is committed to continuously improve its products. We reserve
the right to improve the design without notice.
Table of contents
Other Woo Audio Amplifier manuals
Woo Audio
Woo Audio WA-5 300B User manual
Woo Audio
Woo Audio WA7d User manual
Woo Audio
Woo Audio WA5 User manual
Woo Audio
Woo Audio WA6-SE User manual
Woo Audio
Woo Audio WA5 User manual
Woo Audio
Woo Audio WA3 User manual
Woo Audio
Woo Audio WA7 Fireflies User manual
Woo Audio
Woo Audio WA11 topaz User manual
Woo Audio
Woo Audio WA23 LUNA User manual
Woo Audio
Woo Audio WES User manual
