WOO AUDIO WA5 Stereo Headphone and Speaker Amplifier Single-Ended, Class-A Owner’s Manual Please review this manual before operating your WOO AUDIO™ product. tm ©2011 WOO AUDIO Inc. All rights reserved. www.wooaudio.com Rev 1.0.
Important Safety Information CAUTION: These amplifiers are shipped without the vacuum tubes installed. It is necessary to install the tubes first. It is essential that the tubes are 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.
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 14 REVIEWS 15 PRODUCT SPECIFICATION 16 tm ©2011 WOO AUDIO Inc. All rights reserved. www.wooaudio.com Rev 1.0.
Overview Thank you for choosing a Woo Audio product. The WA5 is finely hand-crafted amplifier that delivers uncompromised performance and superior listening experience. Discrete headphone and speaker circuits High-end output transformer design Point-to-Point wiring Selectable speaker, AKG-K1000, high and low impedance dynamic headphones output switch Soft start tube protection circuit One 1/4" or 6.
Quick Installation What’s in the box? ① Amplifier unit ② Power supply unit ③ One matched pair of 300B tubes ④ One matched pair of 6SN7 tubes ⑤ One matched pair of 5U4G tubes ⑥ DC cord connecting between the AMP and PSU The actual look of the tubes may look different. Compatible tubes may be included instead of the ones mentioned above. Power cord and interconnection cable are not included.
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. Guide pin shows on the bottom of a tube. Tube socket guide pin indicator 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 harder to insert tube, never apply circular motion.
Installing the 300B tubes: Be aware that the large pins should be inserted into the large pin receptacles. Selecting AC voltage: WARNING: failure to select the correct voltage will result in damage of the amp. Switch to label “230” for AC210 to 240V voltage. Switch to label “115” for AC100 to 125V voltage. Installing the power cord: Plug the power cord into the AC inlet, see ① in the below diagram. The AC inlet socket is a standard IEC type. You will need to obtain the correct type for your region. U.
Installing the DC cord: The DC cord is non-directional. It can be inserted into either socket. Installing the source input: Plug the RCA interconnection cable into the RCA connectors, see ⑥ in the below diagram. Back panel diagram: ① AC Inlet with fuse box ② Voltage selection switch ③ DC output ④ DC input ⑤ Speaker terminals ⑥ RCA input tm ©2011 WOO AUDIO Inc. All rights reserved. www.wooaudio.com Rev 1.0.
Operation DO NOT o Turn on the amp before properly installing ALL tubes. o Use tubes that are not approved by Woo Audio. o Turn on the equipment without checking the correct AC voltage setting. o Remove any tubes or DC cord while the amp is in operation o Switch to SPK or K1K setting without speakers or AKG K1000 connected to the amp. However, you can switch between the high and low impedance setting. o Touch tubes (extremely hot) after warm-up. o Leave the amps to run unattended.
Turning on the amplifier: 1. Set the functional switch to a proper position 2. Insert a headphone into the headphone jack, or connect speakers to the amp unit. Turn the volume knob to the lowest position. 3. Turn the power switch knob ⑥ from left to right until you hear a click sound. The power LED on the AMP will light while the LED on the PSU will blink for approx 20 seconds. LED blinking indicates the amp is starting up. 4. Observe that all tubes light gradually and the PSU’s LED becomes solid. 5.
Power Rectifier Driver Compatible Tubes Model# 6SN7 * /GT /WGT 5692 6CG7 6F8G 7N7 CV181 CV1988 ECC32 VT231 5U4G * /B 274A 274B 53KU 5AR4 5AS4 5Z4 5R4 5U3C 5V4 /G /GA 5Y3 5Z3 83 GZ30 GZ32 GZ33 GZ34 GZ37 CV378 U52 U54 WE 300B * EML 300B / XLS Treasure 300B Sophia 300B EAT 300B EH 300B JJ 300B Shuguang 300B Svetlana 300B Takatsuki 300B Adapter No No Yes Yes Yes No No No No No Yes No No No No No No No No No Yes Yes No No No No No No No No No No No No No No No No No No Comment A 9‐pin to 8‐pin adapter is n
FAQ - Frequently Asked Questions There is abnormal sound right after turning on the amplifier. This is normal from a cold start as the tubes are warming up to get into the proper working state. The noise will disappear gradually. Can I change headphone while the amplifier is on? Yes, but you must first minimize the volume. No sound is coming out of the headphone. o o o o Check all tubes are properly installed. Check source is properly installed and it is working fine.
The LED and the tubes do not light. First check if the AC cord is installed. Then, check if the fuse is burnt. See the following instruction on how to replace a fuse. The fuse type is 2-3A, slo-blo. Insert a small flat screwdriver into the fuse door which located on the AC inlet. tm Release the fuse door by pulling it out. ©2011 WOO AUDIO Inc. All rights reserved. The fuse holder is released from the AC inlet. www.wooaudio.com The fuse is held by a clip. Rev 1.0.
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 detail explanation of the problem(s).
Reviews “What I wanted to hear was a magic midrange, full, lush sound and that 3-D impact that single ended 300B amps can deliver. I wanted this sound but not the $20,000.00 price tag that goes with it! The Woo WA5 delivered.
Product Specification Model: WA5 Headphones Impedance: 8-800 Ohms Input Impedance: 100 Kilo-Ohms Frequency Response: 10 Hz - 60 KHz, -2dB Power Output: 640mW @32Ω 630mW @60Ω 1000mW @120Ω 850mW @300Ω 580mW @600Ω K1000 8W @120 Ω(WA5) SPK 8W @8 Ω(WA5) Signal/Noise: 95 dB THD: <= 0.08%, 1Khz Voltage: AC 110/220 - 240V, 50/60 Hz, switchable External Dimension, end to end 8.