Woo Audio WA22 Fully balanced - Manual (Page 10)

©2011 WOO AUDIO tm Inc. All rights reserved. www.wooaudio.com Rev 1.0. June 9, 2011. 10
Turning the amplifier on:
1. Turn the volume knob ① to the lowest position.
2. Insert a headphone into either ②, or ③, or ④ output .
3. Turn the power switch knob ⑤ from OFF to HI or OFF to LO position. Then, the power
LED will pulsate for approx 20 seconds.
4. Observe that all tubes light gradually.
5. Wait until the LED ⑥ becomes solid and let the tubes warm up for at least 1 minute
before turning up the volume.
Front panel diagram:
① Volume control
② 3-pin XLR headphone output, Left and Right channel.
③ 4-pin XLR headphone output
④ TRS (¼” or 6.35mm) headphone output
⑤ Multi-functional switch for power switch and high/low impedance selection
⑥ 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 playing.
Please do not leave the amp running continuously.