Ferrari Mailing List: FW: Need help with stereo in Ferrari

[Charles Perry (charles]

Rob -

Attached is a scan of the AutoSound 2000 noise troubleshooting flow
chart I got when attending one of their seminars back when I worked for
Crutchfield. It is quite systematic and complete. Let me know if you
have any questions about it. It does assume some test equipment you may
not have, but if you can follow it by the letter it will figure out your
problem.

-- charles


PS - List, I did not attach it due to size. If anyone else wants a copy
let me know off-list.



-----Original Message-----
From: Robert W. Garven Jr. [mailto:rgarven [at] gmail.com]
Sent: Saturday, March 07, 2009 9:06 PM
To: Charles Perry
Cc: The FerrariList
Subject: [Ferrari] Need help with stereo in Ferrari



All,

I bought a blaupunk small subwoofer to try to make the samll speakers in
my gt4 sound better, I am having a problem and know that there are a few
electronic experts here!


I took everyones advice and ran a 10 gauge wire from my battery to the
subwoofer, with a 10 amp fuse around six inches from the post. I spent
around 4 hours removing the screws, seatbelt, shift gate etc so I could
access the underside of the stereo. I hooked up all the wires and before
i put it back together I mage sure it worked and it sounded great. Fast
worrward 8 hours putting everything back and cleaning etc.  
I pull the car out of the garage
fire it up and evenj with the stero off I get a loud crackling through
my speakers! I unhooked everything one wire at a time and it seemed to
be the expensive street wire RCA cable that attached from the back of my
cassette deck to the subs RCA inputs!

I removed everything again and this time cleaned up all the wire under
the radio etc and tried a rockford fosgate shielded RCA cable this time
started up the car and no crackling!! Great!! I put everything back
together ( again) and pull the car out of the garage and this time the
sub is making a weird gurgling sound, I remove the RCA plugs and this
reduces it but it is still there.

Here is my problem?

I am running solid core wires and NGK BP6ES plugs. I know. I know, but
the car runs great with the wires and I will do without the sub before i
remove them! Will a resistor plug solve my problem?

Remember my stereo (cassette) never had any noise ever (the radio did
but I dont listen to that). The sub has high powered speaker leads which
I could try but the unit is obviously making weird nosise with only the
power attached an no inputs so I am nt sure that would be much better.
This thing sounds great with the car off and gives just enough bass to
make the 4" speakers sound great. I anyone has any suggestions.

I know you guys are going to say no but it seems that interference is
coming from my ignition being picked up by the power wire and the RCA
cable (but the cassette sounds fine). Since this is such a small 70 watt
unit why cant I hook it up to the same power wire that my cassette is
hooked up to eliminating the 10 gauge wire.



Rob

Thanks for all your help in advance. If a resistor plug might work I
would like to try that as changing plugs is about 10 times easier than
removing the console again!!!

Robert W. Garven Jr.
rgarven [at] gmail.com


  "The Ferrari is a dream - people dream of owning this special vehicle
and for most people it will remain a dream apart from for those lucky
few". Enzo Ferrari





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