Fordmods Logo

Engine Noise Though Speakrs Help(Not Earth) 

 

Page 1 of 3 [ 44 posts ] Go to page 1, 2, 3  Next

 
 Post subject: Engine Noise Though Speakrs Help(Not Earth)
Posted: Sat Jul 07, 2007 10:20 pm 
Getting Side Ways
Offline
User avatar

Age: 29

Posts: 2159

Joined: 15th Nov 2005

Gallery: 17 images

Ride: TS40

Location: Latrobe Valley
VIC, Australia

response 4 chnl amp running 2 type-R splits and 2 us audio subs

Hey All hav a reving noise though speakers (dont think its though the subs but could be due to the LPF) but only when the RCA's are pluged into the amp for the subs... hav ruled out a dodge RCA cable and earth problems any more ideas...?

 

_________________

Was - 2001 AUIII Ford Falcon Forte
Genuine T2 TS50 bodykit, 18" BF Cobras, Boge and Eibach Suspension and Complete AU2 Fairmont Ghia Interior

Now - 2012 FG Mk2 Ford Falcon XR6
Swift Green,6 Speed Auto, Stock... and a Fuel Card :)

Top
 Profile  
 
 
Posted: Sat Jul 07, 2007 10:31 pm 
Technical Contributor
Offline
User avatar

Age: 38

Posts: 4093

Joined: 20th Mar 2005

Gallery: 2 images

Ride: 2.0 Turbo VW

Power: 142 rwkw

Location: Seaford State:
VIC, Australia

ran the RCA beside the Power wire?

 

_________________

Carefree, we may not be number one, but we're up there.

Top
 Profile  
 
 
Posted: Sat Jul 07, 2007 10:51 pm 
Getting Side Ways
Offline
User avatar

Age: 29

Posts: 2159

Joined: 15th Nov 2005

Gallery: 17 images

Ride: TS40

Location: Latrobe Valley
VIC, Australia

they are fairly close but it only does it when there both plugged in.. if just the front peakrs r in there fine sam with subs and no front speakrs.. its only when all three or four rca's are plugged in...

 

_________________

Was - 2001 AUIII Ford Falcon Forte
Genuine T2 TS50 bodykit, 18" BF Cobras, Boge and Eibach Suspension and Complete AU2 Fairmont Ghia Interior

Now - 2012 FG Mk2 Ford Falcon XR6
Swift Green,6 Speed Auto, Stock... and a Fuel Card :)

Top
 Profile  
 
 
Posted: Sun Jul 08, 2007 12:25 pm 
Getting Side Ways
Offline
User avatar

Age: 29

Posts: 2159

Joined: 15th Nov 2005

Gallery: 17 images

Ride: TS40

Location: Latrobe Valley
VIC, Australia

hey all... ran the power cable down the other side of the car and its fine now.... sorry didn't realize how many threads there are about this...

 

_________________

Was - 2001 AUIII Ford Falcon Forte
Genuine T2 TS50 bodykit, 18" BF Cobras, Boge and Eibach Suspension and Complete AU2 Fairmont Ghia Interior

Now - 2012 FG Mk2 Ford Falcon XR6
Swift Green,6 Speed Auto, Stock... and a Fuel Card :)

Top
 Profile  
 
 
Posted: Mon Jul 09, 2007 12:38 am 
Getting Side Ways
Offline
User avatar

Age: 31

Posts: 11103

Joined: 15th Nov 2004

Ride: AU III XR8 Pursuit 250 ute

Location: Hobart
TAS, Australia

the lazy alternative is to just get a Ground Loop isolator, it's a box that goes inlinee with the RCA leads, seems to stop it. but you end up turning up your gain as it lowers the volume a bit too.

 

_________________

Heaps of performance EF/L parts for sale, including supercharged VCT motor!

2002 Ford AU Series III Falcon XR8 Pursuit 250 ute - 5.6L of V8 Windsor!

Top
 Profile  
 
 
Posted: Sat Jul 28, 2007 7:42 pm 
Getting Side Ways
Offline
User avatar

Age: 29

Posts: 2159

Joined: 15th Nov 2005

Gallery: 17 images

Ride: TS40

Location: Latrobe Valley
VIC, Australia

yeah ended up with the lazy alt... it came back...

 

_________________

Was - 2001 AUIII Ford Falcon Forte
Genuine T2 TS50 bodykit, 18" BF Cobras, Boge and Eibach Suspension and Complete AU2 Fairmont Ghia Interior

Now - 2012 FG Mk2 Ford Falcon XR6
Swift Green,6 Speed Auto, Stock... and a Fuel Card :)

Top
 Profile  
 
 
Posted: Sat Jul 28, 2007 9:13 pm 
Fordmods Junkie
Offline
User avatar

Posts: 11739

Joined: 17th May 2005

Gallery: 11 images

Ride: EL Fairmont, VFR400 racer

Power: 144 rwkw

Location: Melbourne
VIC, Australia

so it is still making high pitch revving noise? If it's still doing it, then it most likely would be the RCA cable near the power cable...If the RCA cables have to cross the power cable close to the amp, try to make them cross each other at a 90 degree angle, so in a x or + manner. Should lower the whirring noises during revs.

If that doesn't solve the problem, it could be the amp, something internally <--- just a wild guess.

phong =P~

 

_________________

phongus = Post whore 2006
EL XR6 motor, EL ECU + J3 chip, WADE 1673 Camshaft, 3" S/S intake, Pacy 4480, 2.5" Hi flow cat, 2.5" Lukey exhaust.
Max Power = 144.6 rwkw (03/05/2008)

Top
 Profile  
 
 
 Post subject: Problem
Posted: Sat Jul 28, 2007 9:52 pm 
Stock as a Rock
Offline
User avatar

Age: 33

Posts: 124

Joined: 19th Nov 2006

Gallery: 5 images

Ride: ea falcon

Location: Sydney
NSW, Australia

i had the same problem with mine i just ran the rca`s on passanger side and then ran the power on the drivers and it stoped my problem.
but yeh like the other guys said you can buy a box that reduces the noise, i think you get it from repco, my mate needed one for his car.

 

_________________

(KIL HSV) ITS ALIIIIIVVVEEEE ITS ALIIIIIVVVVVEEEE!!!!!!!!!!!!!

Top
 Profile  
 
 
Posted: Sat Jul 28, 2007 10:02 pm 
Getting Side Ways
Offline
User avatar

Age: 31

Posts: 4849

Joined: 19th Feb 2005

Gallery: 1 images

Ride: BA Falcon Suzy Across

Power: 178 rwkw

Location: melbourne
VIC, Australia

get some bare cable and loosely twirl around the RCA's where it crosses or comes close to the power cables. and then earth that wire. Then wrap that portion in aluminium foil.

 

_________________

178.3 rwkw
15.1@96 mph
Now with 3.9 shrooms

Top
 Profile  
 
 
Posted: Sun Jul 29, 2007 11:39 am 
Getting Side Ways
Offline
User avatar

Age: 29

Posts: 2159

Joined: 15th Nov 2005

Gallery: 17 images

Ride: TS40

Location: Latrobe Valley
VIC, Australia

smiley235 wrote:
get some bare cable and loosely twirl around the RCA's where it crosses or comes close to the power cables. and then earth that wire. Then wrap that portion in aluminium foil.


so is this whats happening in the box???

 

_________________

Was - 2001 AUIII Ford Falcon Forte
Genuine T2 TS50 bodykit, 18" BF Cobras, Boge and Eibach Suspension and Complete AU2 Fairmont Ghia Interior

Now - 2012 FG Mk2 Ford Falcon XR6
Swift Green,6 Speed Auto, Stock... and a Fuel Card :)

Top
 Profile  
 
 
Posted: Sun Jul 29, 2007 12:25 pm 
Getting Side Ways
Offline
User avatar

Age: 45

Posts: 582

Joined: 20th Nov 2004

Ride: xr6

Location: Brisbane
QLD, Australia

A ground loop isolator is simply a transformer that "isolates" one end of the cable from the other so there is no electrical connection through the cable which avoids ground currents flowing through the system.
Unfortunately being a transformer there are some losses involved though not a lot but there is the issue of loss of frequency response changes as transformers change efficiency as the frequency changes.
So these should only be used as a last resort, like most things it is best to get everything right before using a band aid.....

 

_________________

Do it once, Do it right!!!!!!

Top
 Profile  
 
 
Posted: Sun Jul 29, 2007 12:42 pm 
Getting Side Ways
Offline
User avatar

Posts: 681

Joined: 3rd Apr 2005

Gallery: 24 images

Ride: BF MKII Ghia

I had a similar problem with my old cd player, i found out that when i conected my amp (first mistake left battery connected) cos i connected the rca cable to the amp then the positive apperently the amp will earth through the rca and because the rca tracks in the headunit arent big enough they burn out, therefore not having a good enough earth, an then hearing engine noise that changes with revs.

well thats one explanation.
Top
 Profile  
 
 
Posted: Sun Jul 29, 2007 1:04 pm 
Getting Side Ways
Offline
User avatar

Age: 31

Posts: 885

Joined: 14th Mar 2007

Location: Castlemaine
VIC, Australia

So many people ask these questions, maybe stickies are needed :)

 

_________________

it can be fast and cheap,but it wont be reliable
it can be reliable and cheap,but it wont be fast
or you can be fast and reliable,but it wont be cheap

Top
 Profile  
 
 
Posted: Sun Jul 29, 2007 2:46 pm 
Getting Side Ways
Offline
User avatar

Age: 30

Posts: 501

Joined: 25th Apr 2006

Ride: ED GLi Classic

Location: Ballarat
VIC, Australia

The RCA earth fuse inside your headunit could be gone. Get some wire, fig8 will do, and put it on the ring of your RCA outputs from your headunit, and ground them. Fire it up and see it that fixes it.

 

_________________

RIP Chelsea
96 EF2 Gli - T5 / Exedy / Wade 977b / P+P / JMM Extractors, 2.5" / Port matched BBM / and more
bmICE

Top
 Profile  
 
 
Posted: Sun Jul 29, 2007 3:13 pm 
Getting Side Ways
Offline
User avatar

Age: 31

Posts: 4849

Joined: 19th Feb 2005

Gallery: 1 images

Ride: BA Falcon Suzy Across

Power: 178 rwkw

Location: melbourne
VIC, Australia

fourL6 wrote:
smiley235 wrote:
get some bare cable and loosely twirl around the RCA's where it crosses or comes close to the power cables. and then earth that wire. Then wrap that portion in aluminium foil.


so is this whats happening in the box???


i'm not sure how the box works, but the method I mentioned is how our control cables at work are shielded from induced voltage around power cables.

 

_________________

178.3 rwkw
15.1@96 mph
Now with 3.9 shrooms

Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 3  [ 44 posts ]  Go to page 1, 2, 3  Next

Who is online

Users browsing this forum: No registered users and 5 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

 

 

It is currently Sat Dec 16, 2017 9:08 am All times are UTC + 11 hours

 

 

(c)2014 Total Web Solutions Australia - Australian Web Hosting and Domain Names