Owner manual

Inc.Allrightsreserved. www.wooaudio.com Rev1.2.April,2013 13



FAQ - Frequently Asked Questions

Computer cannot find the WA7 Fireflies USB DAC.

o Check USB cable connection and make sure the cable is USB 2.0 compatible.

o See “Installing USB driver” section for configuration.

No sound is coming out of the headphone jack.

o Check you have selected the correct position of the Input-Output switch. Check input connection.

Check computer USB output setting if USB input is used.

No sound is coming out of the mini headphone jack.

o Only one headphone is operational at a time. Disconnect headphones from the ¼” jack to enable

output of the mini phone jack.

There is static noise, or one channel is dropping out.

o Re-seat all tubes. Make sure that all tubes are securely installed.

The LED does not light.

First check if the AC cord is installed. Next, check if the umbilical cord is securely attached between the

amp and the power supply. If the fuse is burnt, see the following instruction on how to replace a fuse. The

fuse type is 400mA@115V or 200mA@230V, slow blow type.



Insert a small flat

screwdriver into the

fuse door located on

the AC inlet.

Pull the fuse door

to o

en it.

The fuse holder

may be released

from the AC inlet.

Replace the burnt

fuse with a new one

