Wyred 4 Sound mPRE - Manual (Page 11)

pg. 9
Troubleshooting
No sound?
If you have your input source and speakers connected but you can’t get
music to play, check the following: (Feel free to test for output at any time during
this process if you find and correct a potential problem)
Always check the position of the volume knob before starting to play music.
Damage to any equipment due to volume spikes will not covered under warranty.
1. Verify that the power cord is securely plugged into the wall and the mPRE.
2. Make sure that the Voltage Selector Switch is in the proper position. Also be sure
to check the fuse which is located in the IEC inlet.
3. Check the switch on the rear to verify that it is in the on position. Make sure that
the blue light is on around the power button and the proper input is selected. If the
light around the power button is green, the power button will need to be pressed
once to turn the Pre-amp on.
4. Inspect your source to make sure that it is sending a signal to the mPRE. If the
source component is new and you have not yet confirmed that it works, consider
trying a known good source.
5. Check the position of the volume knob on the mPRE. The point where sound will
become audible varies with each system although it is typically around ¼ of the way
turned up (clockwise) from the lowest setting (all of the way counter-clockwise).
6. Carefully check your connections to your amplifier or active speakers to ensure
that all components are powered on and ready for use.
7. Verify that the interconnects and speaker cables are working by replacing them
with a different set from a connection that you know work. If these cables were
used in the current setup and the only component that has changed is the mPRE
continue to the next step.
8. Now that you have interconnects that you know work, try connecting them to
another source that you also know has worked in the past.
If you are still experiencing problems and have exhausted your available resources
and time please contact the dealer/distributor that you purchased the product from
for further assistance.
Got hum?
Is there too much hum coming out of your speakers? If the noise is easily
heard at a distance, try putting the mPRE on mute. If this eliminates the noise, it
could be getting fed from your source or the pre-amp may need to be serviced. If
the noise still exists while muted, try disconnecting the inputs to the Pre-amp. If the
noise is still there when the inputs are disconnected to the pre-amp you will want