Alternator Noise

Sounds to me like the long speaker wire is acting like an antenna and picking up the alternator noise. You may need to wrap the speaker wire around a toroid to see if it solves your problem.

 

Sounds to me like the long speaker wire is acting like an antenna, and picking up the alternator noise. You may need to try wrapping the speaker wire around a toroid, to see if that solves your problem.

 

Oops, double post....sorry.

 

Yes that's correct. Amazon sells one with wire already wrapped around the toroid.

https://www.amazon.com/1st-Source-Torroid-Choke-Filter/dp/B002AUFVWA

Except , you will do the similar thing with the existing speaker wire. It would be worth a try anyway.

 

I have seen them in my surfing and that guys make them but never knew what for...Something i learned today..

 

Seeing he said it seems as if speaker wire is acting like an ant,i would try that first..Or buy two and do both..

 

Sorry for the late post. I totally forgot that the DSP speaker would need external power to it. My guess would be that the alternator whine would be coming in through the power cable. I would try that first, and it wouldn't hurt to install a toroid on the actual speaker wire too, like Craig said.

 

Alternator whine is really frustrating. Seeing that the alternator is the source of the noise, I would address the alternator. An RF choke on the alternator wires themselves is probably the only thing that's going to solve the problem. The RF chokes that snap together to fit over the wire should do the trick.. you need to choke off the RF traveling on the alternator wires.. place the chokes on the wire as close to the alternator as you can. You also need to get chokes made to work near those frequencies, if I remember correctly. So, a ferrite made from the proper ferrite materials.. RF parts can probably help you out....going to need a length of them, 8" or so... again RF parts will probably know what material and what length

 

Duplicate post, deleted