11
Frequently Asked Questions
Why is there no sound from my speakers?
- Check that input and output cables are plugged in all the way at both ends.
- Are your preamplifier and power amplifier turned on? Is the correct input selected on the preamplifier?
- Make sure you have selected the correct input on your Zdac v.2.
- Are your headphones plugged in to the Zdac v.2?
- If you are trying to listen to a DVD or Blu-ray, ensure that you have set the DVD/Blu-ray player to
output only Stereo PCM Audio (2.0). The Zdac v.2 will not decode Dolby Digital
®
, DTS
®
or multi-
channel PCM.
- If you are trying to listen to a connection from an HDTV (or cable/Satellite TV), ensure that you have
set the TV to output only Stereo PCM Audio (2.0). The Zdac v.2 will not decode Dolby Digital
®
or
DTS
®
.
Why is there no sound from my headphones?
- Check that input cables are plugged in all the way at both ends.
- Make sure you have selected the correct input.
- Is the headphone volume knob turned down?
I have a USB problem
- Check if the Zdac v.2 is recognized as a USB device in your computer’s control panel.
If not, remove the USB cable from the computer and re-insert it. Your computer should indicate that it
has found and identified the Zdac v.2. If it doesn’t, then try rebooting it with the Zdac v.2 connected.
- Unplug the Zdac v.2 power cord for about 10 seconds and turn it on again.
- Is your computer operating correctly? Is the music playing or paused?
Is the volume turned up on
your computer on both the task bar and in the application?
I can hear a hum or buzzing noise from my speakers and headphones
-
Cable TV
is the most common source of hum. If you have a cable TV box connected to your audio
system temporarily remove the incoming cable line from the Cable TV box. If the hum goes away the
problem is the cable TV ground. You will need a Cable TV ground isolator which is an inexpensive
device that attaches between your incoming TV cable and the Cable TV box.
- Light Dimmers can cause noise in your audio. Try turning lights that are controlled by dimmers all the
way off. If the hum goes away the problem is the effect the dimmers have on your AC power. A line
conditioner might help.
- Ground Loops are a common cause of hum and buzzing noise. Finding a ground loop is a process of
elimination. Unplug your source components one at a time. When the hum goes away you’ve
identified the source of the ground loop. You might be able to stop the hum by attaching a wire from
the chassis of the offending component to the chassis or ground screw of your preamplifier.
