RCA cables...

karamello · 09-07-2007, 08:37 AM

hey guys,

ive been doing some research on installing an amp and i have read that the power wire and remote wire should run down one side of the car while the rca cables and speaker wire on the other side...

reason being power wire will interfere with the signal wires..

i was wondering if many ppl have used this technique and if not, is there much of a difference? do many ppl have experience with installing amps?

thanks

Dogo · 09-07-2007, 09:20 AM

As long as they're not too close is ok. They dont need to necessarily be on opposite sides of the car , running them down opposite sides of the centre console is fine.

Try not to let them get to close anywhere , avoid letting the RCA cross the power and if they do, do it at right angles.

Else you can get engine noise induced into the RCAs - which will sound like a whine through the speakers that raises and falls with the car revs.

bourbon · 09-07-2007, 12:16 PM

ohhh i better rewire all mine while the car wont be on the road

hahha....i thought it interefered but ohhhh well...

infusion · 11-07-2007, 11:12 PM

Quote:

Originally Posted by Dogo

power and if they do, do it at right angles.

elaborate? please

cheers.

Bear · 11-07-2007, 11:24 PM

if the wires run side by side the power lines will induce a current in the speaker wires, and voila, engine noise in the stereo ... but ... if the wires are only allowed to cross at right angles, the magnet field produced in the wires can't induce a current in the speaker wires .... http://en.wikipedia.org/wiki/Electromagnetic_induction

the simple rule of thumb, just keep the wires apart ... running them down each side of a car is something only an audiophile would do, but if you can, why not?

milehigheric · 12-07-2007, 06:42 AM

Yeah electromagnetic interferance will only occur when two wires are running paralel to each other in close proximity. Engine noise is a btich to find the source when you have it, so for this reason most simply put the power down one side and the RCA's down the other to prevent a possible problem later.

Interference only effects RCA cables and not speaker wire, so get yourself a half decent set of RCA's (bassicaly any twisted pair design) and you should be sweet.

-Eric

infusion · 12-07-2007, 11:11 AM

ohh ok... i thought it might of been my speaker wire.... why no engine noise in speaker wire?

bourbon · 12-07-2007, 12:16 PM

speaker wire is twisted ... RCAs arnt from memory...

Dogo · 12-07-2007, 02:15 PM

nope

The speaker wires are carrying a stronger current ( becuse its been amplified ! ) and this makes them more resistant to induced noise.

RCAs carry a very weak current - which is sensitive to induction from nearby strong currents - which is then amplified - making the induced noise even more pronounced.

bourbon · 12-07-2007, 02:48 PM

well lahdy dah dahhhhh mr technical

hahaha i thought my explination sounded good...but yours is just tooo good

SIlversp20 · 03-08-2007, 01:45 PM

so thats why i can here my revs through the sub lol haha sounded good til i realized it was a bad thing.

Matt

karamello · 03-08-2007, 03:35 PM

lol yea i just ended up doing it right the first time and put the power and rcas and different sides of the car...

09-07-2007, 08:37 AM	#1
karamello Senior Member Join Date: Jan 2007 Location: Brisbane, Queensland Car: Mazda 323 Astina BG Posts: 658 View Photos By: karamello	RCA cables... hey guys, ive been doing some research on installing an amp and i have read that the power wire and remote wire should run down one side of the car while the rca cables and speaker wire on the other side... reason being power wire will interfere with the signal wires.. i was wondering if many ppl have used this technique and if not, is there much of a difference? do many ppl have experience with installing amps? thanks

09-07-2007, 09:20 AM	#2
Dogo Senior Member Join Date: Mar 2002 Location: Melb, Aus Car: Mazda 323 BA BPT transplant Posts: 3,459 View Photos By: Dogo	As long as they're not too close is ok. They dont need to necessarily be on opposite sides of the car , running them down opposite sides of the centre console is fine. Try not to let them get to close anywhere , avoid letting the RCA cross the power and if they do, do it at right angles. Else you can get engine noise induced into the RCAs - which will sound like a whine through the speakers that raises and falls with the car revs. __________________ [ Turbo BA ] see my readers ride

09-07-2007, 12:16 PM	#3
bourbon The Hairy Mod Join Date: Sep 2005 Location: southside ya'll and North Side, Brissy Car: MINI Cooper S 2003 Posts: 8,110	ohhh i better rewire all mine while the car wont be on the road hahha....i thought it interefered but ohhhh well... __________________ For All your crash repair panels & lights, clear lights contact us at PANEL HOUSE 45 RANDALL ST SLACKS CREEK QLD 4127 PHONE : 07 3808 8737 FAX : 07 3808 8735

11-07-2007, 11:24 PM	#5
Bear Junior Member Join Date: Jun 2003 Location: not in a cave Car: 2007 True Red Mazda 3 MPS Posts: 224	if the wires run side by side the power lines will induce a current in the speaker wires, and voila, engine noise in the stereo ... but ... if the wires are only allowed to cross at right angles, the magnet field produced in the wires can't induce a current in the speaker wires .... http://en.wikipedia.org/wiki/Electromagnetic_induction the simple rule of thumb, just keep the wires apart ... running them down each side of a car is something only an audiophile would do, but if you can, why not? __________________ Mazda 3 MPS - True Red - 2.3L Turbo "It's a job. Grass grows, birds fly, waves pound the sand. I just beat people up" - Muhammad Ali

12-07-2007, 12:16 PM	#8
bourbon The Hairy Mod Join Date: Sep 2005 Location: southside ya'll and North Side, Brissy Car: MINI Cooper S 2003 Posts: 8,110	speaker wire is twisted ... RCAs arnt from memory... __________________ For All your crash repair panels & lights, clear lights contact us at PANEL HOUSE 45 RANDALL ST SLACKS CREEK QLD 4127 PHONE : 07 3808 8737 FAX : 07 3808 8735

12-07-2007, 06:42 AM	#6
milehigheric Junior Member Join Date: Mar 2007 Location: goldie Car: mazda astina 323 BG Posts: 100	Yeah electromagnetic interferance will only occur when two wires are running paralel to each other in close proximity. Engine noise is a btich to find the source when you have it, so for this reason most simply put the power down one side and the RCA's down the other to prevent a possible problem later. Interference only effects RCA cables and not speaker wire, so get yourself a half decent set of RCA's (bassicaly any twisted pair design) and you should be sweet. -Eric

12-07-2007, 11:11 AM	#7
infusion Junior Member Join Date: Jun 2007 Location: Penrith Car: Ef manual falcon + SP20 Posts: 96	ohh ok... i thought it might of been my speaker wire.... why no engine noise in speaker wire?

12-07-2007, 02:15 PM	#9
Dogo Senior Member Join Date: Mar 2002 Location: Melb, Aus Car: Mazda 323 BA BPT transplant Posts: 3,459 View Photos By: Dogo	nope The speaker wires are carrying a stronger current ( becuse its been amplified ! ) and this makes them more resistant to induced noise. RCAs carry a very weak current - which is sensitive to induction from nearby strong currents - which is then amplified - making the induced noise even more pronounced. __________________ [ Turbo BA ] see my readers ride

12-07-2007, 02:48 PM	#10
bourbon The Hairy Mod Join Date: Sep 2005 Location: southside ya'll and North Side, Brissy Car: MINI Cooper S 2003 Posts: 8,110	well lahdy dah dahhhhh mr technical hahaha i thought my explination sounded good...but yours is just tooo good __________________ For All your crash repair panels & lights, clear lights contact us at PANEL HOUSE 45 RANDALL ST SLACKS CREEK QLD 4127 PHONE : 07 3808 8737 FAX : 07 3808 8735

03-08-2007, 01:45 PM	#11
SIlversp20 Junior Member Join Date: Apr 2007 Location: brisbane, North Lakes Car: 2002 BJII sp20 Posts: 170 View Photos By: SIlversp20	so thats why i can here my revs through the sub lol haha sounded good til i realized it was a bad thing. Matt

03-08-2007, 03:35 PM	#12
karamello Senior Member Join Date: Jan 2007 Location: Brisbane, Queensland Car: Mazda 323 Astina BG Posts: 658 View Photos By: karamello	lol yea i just ended up doing it right the first time and put the power and rcas and different sides of the car...