[s-cars] Rice Crispies in my radio....

[Taka Mizutani]

Steve-
While I do not have any pops or crackles when turning off the radio, I did
experience a sound more like a soft "thud" when turning on my radio in my
old 200. I had an a/d/s amp that lacked a soft turn-on, so it made a noise
when powered up- a result of the preamp being powered up (the headunit)
before the power amp (because the remote turn-on lead from the headunit
activated the amp, not the ignition).

Because the factory amps do not exhibit this kind of behavior, I think you
have some sort of electronics failure that's causing the noise. I would get
it inspected soon rather than later and refrain from using the stereo until
then- you don't want to have a big failure and a fire or anything like that.

Taka


On 1/25/06, Young, Steve <sryoung at trane.com> wrote:
>
> Tapping the lister knowledgebase...
>
> Yesterday when I shut off the ignition my 95.5 Avant, there was a
> deafening
> "pop-crackle" through the speakers after about a one to two second delay.
> After some minor investigation, I have determined that it appears not
> ignition switch related.  With ignition either on or off, I get a single
> "pop" when I turn the radio on, and a more significant "popping-crackling"
> when I turn the radio off.  Now these "pops" sound like they are at full
> volume, enough to make you jump even if you are expecting it, so I am
> concerned about damaging the speakers.  Radio works fine when on, and I
> have
> a Concert 1 with a Phatbox upgrade that was completed months ago.  Anyone
> experienced anything like this?  I'm leaning towards a head unit issue,
> but
> have not had a chance to swap in something else to see if the problem goes
> away.  One other thing, with the radio off while driving the car, I now
> hear
> some minor motor noise interference (whine) through the speakers that was
> not there before.  Any leads are appreciated.  TIA.
>