Well, did you read through those PDF files I linked in the FAQ?
Yes, I did. In fact the scraping of paint and bolting the mass cable comes right out of
document 999502 which did really help. According my interpretation of the PDF document, I should focus on the amp power cables to eliminate the remaining noise.
But I also used
this Cruthfield diagram which, if I follow it leads me to this conclusion:
Noise is being picked up by one or both your receiver's power leads. Install a noise filter on one or both of the leads.
These two different outcomes made me post the original post in this thread.
One thing that's often overlooked is inductive noise. The audio cables are probably picking up a lot of the noise just from being in the general vicinity of other wiring.
It might be worth to note that I bought the best RCA cable I could find: Diehl (red) triple-shielded with aluminium foil as the third shield.
As I was doing it, I discovered that even moving the cables around behind the dash would change the amont of noise in the system. Keep this in mind as you're diagnosing the problem.
Having followed the Crutchfield diagram, I did play the Empeg out of the dash. My RCA and power cables were long enough to put the Empeg on the passenger seat. This meant the RCA cables were totally stretched rather than stuffed inside the dash. This alone did not effect the noise problem.
Powering the Empeg with the AC adapter, while on the passenger seat did.
Also, check to make sure there aren't any loose wires on the docking connector, or elsewhere in the system.
You mean the AUX and serial connectors? Yes, they are loose. Should I seal them or cut them off?
If your wires were crimped instead of soldered, re-check all crimps. Better yet, replace all crimps with solders.
Which wires are you referring at? My speaker cables are crimped. My RCA cables are moulded. My ISO cables are from the factory. I do still use the diode cable that was necessary for my previous car, as it also holds the resistor that is needed for my carphone. Oh, and yes, the carphone is using the same power supply as the Empeg.
As the carphone and all the audio cabling was done by my car dealer's carphone specialist, there is not much I can change without breaking things. My installer did confirm to me that he routed the power cables and audio cables on separate sides of the car, though.
Maybe I'm just being too fussy, maybe there is some amount of noise which just needs to be accepted. The noise I am hearing can only be heard at low volume, or when the player is paused. If the volume is cranked up, the noise cannot be heard.
I invite anyone to come listen at Amersfoort to hear whether I am hearing a more or less than average amount of noise.
Thanks,
Pim (60 GB, red)