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Author Topic: Still having strange sound from HEADUNIT  (Read 2314 times)

Offline rehu

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Still having strange sound from HEADUNIT
« on: 18 November 2009, 13:41 »
so im still having this whistling sound from my headunit, which increases when i give some revs.. ive been checking grd cables - all were good.. my amp got like 15 volts(? i think :D) and so i replaced highvoltage sensor.. now its only giving 14.6.. but still that annoying sound, it isnt that big, and comes from headunit! not from mids etc..

ive been thinking should i fit another grd cable from my battery just to make sure it will get enough grding..

you gotta love golfs... tought these arent big problems :D..

anyone have solution for that whistle thing?
« Last Edit: 25 November 2009, 20:46 by rehu »
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Offline troublestarter

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Re: Still having strange sound from HEADUNIT
« Reply #1 on: 18 November 2009, 14:25 »
whistling will always be either an earthing fault or you have run your rca's/speaker cable next to the amps power cable
have you tried just plugging in another rca into your h/u and just draping it over the seats to the amp
if this solves the problem then you need to re route your rca cable away from the power cable
also check you have a good strong earth usually best to use a seat belt bolt
i have seen lots of installs where the amp is earthed to the tailights and this is a very poor connection option
also make sure your earth is rubbed back to bare metal
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Offline Alec

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Re: Still having strange sound from HEADUNIT
« Reply #2 on: 18 November 2009, 14:52 »
Could that also be something to do with a signal diffuser? I had a mini that used to do it all the time and it was so annoying
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Offline Len

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Re: Still having strange sound from HEADUNIT
« Reply #3 on: 18 November 2009, 15:33 »
My amp is earthed to the tailights and its fine!  :smug:
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Offline Adam

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Re: Still having strange sound from HEADUNIT
« Reply #4 on: 18 November 2009, 17:14 »
Quote from: Len on 18 November 2009, 15:33
My amp is earthed to the tailights and its fine!  :smug:

Until something goes wrong and takes out your rear lights..... :undecided:

Put them on the rear seat belt points is your best bet.
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Offline andc1

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Re: Still having strange sound from HEADUNIT
« Reply #5 on: 18 November 2009, 17:53 »
earths straight to battery :wink: :wink:
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Offline rehu

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Re: Still having strange sound from HEADUNIT
« Reply #6 on: 19 November 2009, 08:23 »
its might be that rca's are touching the powercable near the amp, have to check that one..  and oh yeah.. i think my speaker cable is going with powercable.. have to fix that one up.. hmm..  my grding is on seatbelt sh!t etc.. so that should be good..
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Offline Len

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Re: Still having strange sound from HEADUNIT
« Reply #7 on: 19 November 2009, 11:12 »
Quote from: Adam on 18 November 2009, 17:14
Quote from: Len on 18 November 2009, 15:33
My amp is earthed to the tailights and its fine!  :smug:

Until something goes wrong and takes out your rear lights..... :undecided:

Put them on the rear seat belt points is your best bet.


Well thats how its been for over 4 years so I dont see a problem. An earth is an earth.
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Offline daytona

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Re: Still having strange sound from HEADUNIT
« Reply #8 on: 19 November 2009, 23:52 »
it use to happen yrs ago on older cars.Its interferance from a bad earth,but prob not ye head unit.there is a little box u can buy to cut down on it.go into a maplins or somehwere like that a a headunit place and theyll sell u what u need.
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Offline Len

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Re: Still having strange sound from HEADUNIT
« Reply #9 on: 20 November 2009, 10:32 »
Quote from: daytona on 19 November 2009, 23:52
it use to happen yrs ago on older cars.Its interferance from a bad earth,but prob not ye head unit.there is a little box u can buy to cut down on it.go into a maplins or somehwere like that a a headunit place and theyll sell u what u need.


Ummmm this guy is in FINLAND! Dont think Maplins have branches there!  :rolleyes:
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