[s-cars] Bose system pops with Alpine deck

[Eric Phillips]

The worn rotary switch and the amps popping or thumping are two
separate issues, IMO.

I, too, had the thumping on DeltaCC power-off (only with rotary knob -
the ignition wasn't in the circuit.)

Then I put in my Traffic Pro, and lo and behold - same problem on
powerdown.  OK, so then I put a device in-line - a speaker -> line out
converter.  No more popping.  :)

I am very happy with the way it all turned out.  I would have
preferred to stick with Audi stuff - like a Concert I as the head unit
- to avoid all the electrical gymnastics it took to make the Traffic
Pro work.

Eric




> Date: Wed, 30 Apr 2008 08:39:37 -0600
> From: <calvinlc at earthlink.net>
> Subject: Re: [s-cars] Bose system pops with Alpine deck
>
> John,
>
> I don't think the Alpine popping, at leasy in my case, has anything to do
> with worn out contacts, since it has done it since day 1 of install.  I
> think the fact that the stock radio does thunk sometimes is a good indicator
> that the input circuits to the amplifiers have no filtering on them to avoid
> this kind of issue.
>
>
> >  I think this is a sign of worn out contacts in the rotary switch.  My
> > early UrS narrow Bose head unit thunks occasionally when powering off and
> > the first two detents above off have no volume anymore.  It switches between
> > sources silently tho, even with the ipod wired into the silver box.  In fact
> > it stays pretty quiet even when unplugging the iPod with CD selected.
>