Alphasonik PFZ460E Benutzerhandbuch

       In the event that your Alphasonik speakers appear to 
require service, we ask that you first do a little troubleshooting 
to determine if the problem is actually the speaker or a problem 
located in a different part of the vehicle such as the amplifier, 
wiring, fusing or possibly the source unit.

    If your Alphasonik speakers have been installed 
professionally by an Authorized  Alphasonik Dealer, we 
recommend that you return to the Dealer and demonstrate the 
problem to a qualified installer or repair technician.  If you 
installed the speakers yourself, use the following guidelines to 
help find the problem:

     1.   No Sound

*Check the source unit or amplifier for power and be sure 

            they are operating properly.

*Check all signal connections.
*Check for any wiring that may be shorting together or  

             touching the metal chassis.

*Check all ground connections.

     2.   Distorted Sound At All Volumes

*Check for bad speaker connections.
*Check wiring for correct polarity.

     3.   Distorted Sound At High Volumes Only

*Check for loose mounting of the speaker.
*Inspect the speaker for debris in the cone or other                  

            obstructions.
     4.   Poor Bass Response

*Check wiring for correct polarity.
*Check for unstable or loose mounting surface.
*Check Bass and Treble controls at the source unit or

            amplifiers.
     5.   Poor High Frequency Response

*Check wiring for correct polarity.
*Check Treble controls or EQ settings.
*Check the Tweeter for possible damage.