Buzzing noise through speakers - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

Shakey Finch · 10th July 2008, 02:14 PM

I've got a really annoying buzzing noise coming through my speakers which has been caused by the amp I've fitted, it's a low level noise but never the less very annoying and clearly not right.

This noise which I assume is interference from somewhere is there even with the ignition on stage 1 (as well as stage 2 and engine running).

The main earth off the battery looks good and has been cleaned up, the RCA leads have been replaced as it was thought they were at fault...but they were not!

An interesting thing I have noticed is that when the stereo is (ignition position 1) on with the volume all the way down and you flash the lights or do something to drop the voltage, the buzzing noise changes pitch.

I'm sure this is car related and not ICE related.

Can anyone recommend a solution to this? I know the 34 GTR has more than 1 earth point, so maybe these need cleaning?

I'm at a loss!!

Any help would be greatly appreciated.

Cheers,

Shakey.

mifn21 · 10th July 2008, 02:28 PM

Yep definitely check the earth points! There should be a main one from the alternator, its always worth wiring a chunky cable between them

Mookistar · 10th July 2008, 02:36 PM

have you fitted a suppressor to the live feed?

Shakey Finch · 10th July 2008, 02:36 PM

Thanks mate.

Shakey Finch · 10th July 2008, 02:38 PM

Quote:

Originally Posted by Mookistar

have you fitted a suppressor to the live feed?

I wish I knew what you meant...sorry. If you mean the live + wire off the battery to the amp, then no, all that has is the usual fuse thingy cut into the cable.

Mookistar · 10th July 2008, 02:52 PM

all i remember from my days as a yoot, moddin mini's, was when the stereo buzzed in line with the rpm, you fitted an interferance suppressor in-line on the live

but that was 10 years ago.

mook

mifn21 · 10th July 2008, 02:59 PM

I was gonna suggest one of them, but then he said that it does it with the engine off, and the igniton live?

Do R34s have the battery in the boot? If so earth your amp direct to the battery - cured the interference problems I had in my old BMW E30

Shakey Finch · 10th July 2008, 03:09 PM

Quote:

Originally Posted by mifn21

I was gonna suggest one of them, but then he said that it does it with the engine off, and the igniton live?

Do R34s have the battery in the boot? If so earth your amp direct to the battery - cured the interference problems I had in my old BMW E30

That's right, engine can be off and it still gets interference, maybe a suppressor won't work in that case, but I will start by checking my earths and maybe earth directly as mifn21 says.

Thanks for the advise so far chaps, I'm glad I asked.

mifn21 · 10th July 2008, 05:16 PM

Earthing to battery is actually the best way to wire an amp - the only reason its not done often is because most cars have the battery up front, and the earth wire should always be short as possible

Shakey Finch · 10th July 2008, 06:01 PM

Quote:

Originally Posted by mifn21

Earthing to battery is actually the best way to wire an amp - the only reason its not done often is because most cars have the battery up front, and the earth wire should always be short as possible

This sounds like good advise, plus it gives me a short and tidy earth lead.

Cheers.

ChrisR32 · 10th July 2008, 10:06 PM

Make sure you haven't run your rca cable down the same side of the car as the main 12V power cable coming from your battery. You still may get interference when you engine is off because of battery being in the boot and power running back down the car to your fuse box?

Shakey Finch · 11th July 2008, 06:45 AM

Quote:

Originally Posted by ChrisR32

Make sure you haven't run your rca cable down the same side of the car as the main 12V power cable coming from your battery. You still may get interference when you engine is off because of battery being in the boot and power running back down the car to your fuse box?

The RCA's were down the same side as the power lead, but they have are now running down the middle of the car, so hopefully they won't cause interference.

madmark1 · 14th July 2008, 10:49 AM

Surprised you can hear it with that new exhaust! he he

mifn21 · 14th July 2008, 02:04 PM

How did you get on mate? Managed to get rid of the buzzing?

Shakey Finch · 15th July 2008, 12:30 PM

Not yet, but thanks for asking. I took the rear seats out and found the end of the earth cable which was bolted on behind the seat back, unfortunately the cable isn't long enough to go from the amp to the -battery terminal. I've just re bolted the cable in the boot area until I can pick up a longer cable.

I'll report back soon.

Mark.

10th July 2008, 02:14 PM	#1 (permalink)
Shakey Finch New Users Join Date: Jul 2005 Posts: 407	Buzzing noise through speakers I've got a really annoying buzzing noise coming through my speakers which has been caused by the amp I've fitted, it's a low level noise but never the less very annoying and clearly not right. This noise which I assume is interference from somewhere is there even with the ignition on stage 1 (as well as stage 2 and engine running). The main earth off the battery looks good and has been cleaned up, the RCA leads have been replaced as it was thought they were at fault...but they were not! An interesting thing I have noticed is that when the stereo is (ignition position 1) on with the volume all the way down and you flash the lights or do something to drop the voltage, the buzzing noise changes pitch. I'm sure this is car related and not ICE related. Can anyone recommend a solution to this? I know the 34 GTR has more than 1 earth point, so maybe these need cleaning? I'm at a loss!! Any help would be greatly appreciated. Cheers, Shakey.

10th July 2008, 02:36 PM	#3 (permalink)
Mookistar ADMINISTRATOR Join Date: Feb 2004 Location: Living life 8min 50 secs at a time Posts: 10,408	have you fitted a suppressor to the live feed? __________________ FOR ALL GTR FORUM RELATED ISSUES CONTACT THE ADMIN TEAM 'MOOKISTAR' OR 'MOLEMAN' SKYLINE FAQ'S!

10th July 2008, 02:52 PM	#6 (permalink)
Mookistar ADMINISTRATOR Join Date: Feb 2004 Location: Living life 8min 50 secs at a time Posts: 10,408	all i remember from my days as a yoot, moddin mini's, was when the stereo buzzed in line with the rpm, you fitted an interferance suppressor in-line on the live but that was 10 years ago. mook __________________ FOR ALL GTR FORUM RELATED ISSUES CONTACT THE ADMIN TEAM 'MOOKISTAR' OR 'MOLEMAN' SKYLINE FAQ'S!

14th July 2008, 10:49 AM	#13 (permalink)
madmark1 GTROC Member Join Date: Mar 2003 Location: Surrey now.......or in hell Posts: 623	Surprised you can hear it with that new exhaust! he he __________________ *Abbey Tuned 450 BHP R33 GTR with...ohh carbon bits and shiny bits......!*

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10th July 2008, 02:28 PM	#2 (permalink)
mifn21 GTROC Member Join Date: Mar 2007 Location: London Posts: 2,128	Yep definitely check the earth points! There should be a main one from the alternator, its always worth wiring a chunky cable between them

10th July 2008, 02:36 PM	#4 (permalink)
Shakey Finch New Users Join Date: Jul 2005 Posts: 407	Thanks mate.

10th July 2008, 02:59 PM	#7 (permalink)
mifn21 GTROC Member Join Date: Mar 2007 Location: London Posts: 2,128	I was gonna suggest one of them, but then he said that it does it with the engine off, and the igniton live? Do R34s have the battery in the boot? If so earth your amp direct to the battery - cured the interference problems I had in my old BMW E30

10th July 2008, 05:16 PM	#9 (permalink)
mifn21 GTROC Member Join Date: Mar 2007 Location: London Posts: 2,128	Earthing to battery is actually the best way to wire an amp - the only reason its not done often is because most cars have the battery up front, and the earth wire should always be short as possible

10th July 2008, 10:06 PM	#11 (permalink)
ChrisR32 New Users Join Date: Aug 2005 Location: West Midlands, Stourbridge Posts: 62	Make sure you haven't run your rca cable down the same side of the car as the main 12V power cable coming from your battery. You still may get interference when you engine is off because of battery being in the boot and power running back down the car to your fuse box?

14th July 2008, 02:04 PM	#14 (permalink)
mifn21 GTROC Member Join Date: Mar 2007 Location: London Posts: 2,128	How did you get on mate? Managed to get rid of the buzzing?

15th July 2008, 12:30 PM	#15 (permalink)
Shakey Finch New Users Join Date: Jul 2005 Posts: 407	Not yet, but thanks for asking. I took the rear seats out and found the end of the earth cable which was bolted on behind the seat back, unfortunately the cable isn't long enough to go from the amp to the -battery terminal. I've just re bolted the cable in the boot area until I can pick up a longer cable. I'll report back soon. Mark.