[s-cars] Bose system pops with Alpine deck

[calvinlc at earthlink.net]

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.

--Calvin

  -----Original Message-----
  From: john cléirigh [mailto:john at johncleirigh.com]
  Sent: Wednesday, April 30, 2008 12:30 AM
  To: calvinlc at earthlink.net
  Cc: Jason Sedmak; Taka Mizutani; s-car-list at audifans.com
  Subject: Re: [s-cars] Bose system pops with Alpine deck


  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.

  john

  calvinlc at earthlink.net wrote:
Does it also pop when you switch between radio/CD/ipod inputs?  I know mine
does on my UrS, but not on the later Bose systems in the B5 S4.  My guess is
that the Bose system in the old car was simply more "sensitive" to it's
inputs.
--Calvin

-----Original Message-----
From: s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com]On Behalf Of Jason Sedmak
Sent: Tuesday, April 29, 2008 11:59 AM
To: Taka Mizutani
Cc: s-car-list at audifans.com
Subject: Re: [s-cars] Bose system pops with Alpine deck


Thanks!
I'm hoping also I can find a speaker ground now not connected in the
harness that might do somthing!
J

On Apr 29, 2008, at 11:55 AM, Taka Mizutani wrote:

  You probably don't have a soft start for your Bose amps, so when
the head unit kicks on, you'll get a thump.

I had the same issue with a Sony ES head unit with an older a/d/s
amp which didn't have soft start- nearly all of the newer amps have
a soft start so you don't have that thump.

It's possible that the factory head unit powers on the amps after
you turn the unit on, so it's controlled by the head unit rather
than the amp.

Taka


On Tue, Apr 29, 2008 at 12:21 PM, Jason Sedmak <jsedmak at mac.com>
wrote:
Hey, I found your thread (from awhile ago) about your problem with
your Alpine deck popping in your '95 S6.
I've just yesterday had the same problem (and I used the Metra
harness).
Did you ever figure anything out or did you just abandon the whole
thing?
Thanks in advance,
Jason

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