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©2011 WOO AUDIO

tm

 Inc. All rights reserved. 

www.wooaudio.com 

Rev 1.1. January, 2013. 

 

 
Installing the power tubes:

 

 
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  6080  tube  should 
install  on  the  “6080”  labeling  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 for 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. 

 

Do no insert a tube at an angle 

 

Insert a tube perpendicular to 
the socket. 

 

Hold base firmly. 

 

 

Summary of Contents for WA3

Page 1: ...s reserved www wooaudio com Rev 1 1 January 2013 1 WOO AUDIO WA3 Stereo Headphone Amplifier Single Ended OTL Class A Vacuum Tube Headphone Pre Amplifier Owner s Manual Please review this manual before operating your WOO AUDIO product ...

Page 2: ...ately 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 obser...

Page 3: ...o com Rev 1 1 January 2013 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 ...

Page 4: ...ience Point to Point wiring One 6AS7 6080 PDF power tube Two 6922 6DJ8 PDF drive tubes One RCA input One pre amplifier output stereo headphone jack Full aluminum die cast chassis anodized finish Whole aluminum volume knob and power switch button 80 watts specially made toroidal transformer Gold pin tube sockets Gold plate RCA Alps potentiometer and power switch Rubycon and WIMA capacitors Dale and...

Page 5: ...5 Quick Installation What s in the box WA3 amplifier One matched pair of 6922 E88CC 6DJ8 driver tubes One 6080 power tube 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 ...

Page 6: ...s 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 circu...

Page 7: ...ket receptacles Installing driver and rectifier 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 tube to the socket ...

Page 8: ...e 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 see in the below diagram Back panel diagram AC voltage selection switch AC inlet RCA pre amp output This is an optional feature RCA input U S European U K ...

Page 9: ... extremely hot after warm up o Leave the amps running unattended To use the amps safely please allow it to cool down for every 8 hours of continuous play time DO o Place the amp away from any wireless or frequency emitting devices such as mobile phones PDAs and radios to avoid noise interference o Keep away from water or excessive moisture o Turn off the amp if its sound is abnormal o Allow a mini...

Page 10: ...ght 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 Headphone output Volume control Power switch Power LED 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 p...

Page 11: ... Comment Driver 6922 No 6DJ8 No 6N1P No 7308 No E188CC No E88CC No E288CC No ECC88 No CCa No Power 6080 No 421A No Greater power Western Electric branded 5998 No Greater power 6AS7 No 6H13C No 6N5P No 7236 No Greater power 2399 No 6520 No The most current chart can be found in this document http tinyurl com 4wbv5qn ...

Page 12: ...eable noise coming from the headphone o Remove all sources from the amp to check if the noise disappears If it does the noise is coming from the source o Place the amp away from other electronic devices to check whether those were causing the noise o Place the amp in a different location to check if the noise is coming from the AC line o Remove all tubes clean tube pins and then reinstall them aga...

Page 13: ...re 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 auth...

Page 14: ... receiving This amp is dimensional tonally very musical i e as in real music jamato8 head fi Probably one of the best audio buys I ve ever made and I ve always been a solid state guy This amp just makes magic with HD 650 s trek100 AudioReview com The most notable difference seemed to be the soundstage it is HUGE I can easily tell from what direction all the voices and instruments are coming from n...

Page 15: ...sponse 8 Hz 100 KHz 3dB Power Output 110mW 32Ω 150mW 60Ω 270mW 120Ω 330mW 300Ω 260mW 600Ω with 6080 tube Signal Noise 95 dB THD 0 08 Voltage AC 110 220 240V 50 60 Hz switchable External Dimension end to end measurement same for both units 6 H x 5 5 W x 13 D Weight 10 pounds Woo Audio is committed to continuously improve its products We reserve the right to improve the design without notice ...

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