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ghiawar
Fordmods - Smokin em up
Age:31
Posts: 255
Joined: 06 Nov 2004
Location: Surrey Downs SA, Australia
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 Posted: Sun Dec 05, 2004 9:51 pm Post subject: interference through speakers |
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I have just installed my splits/amp package I got a while back, and it sounds awesome. I thought I would play it safe and install a noise filter as well, which has helped, but I still get a faint buzzing through the speakers whenever I have the headlights on.
Anyone got any ideas as to why? I have routed the signal wires and the power wires through opposite sides of the car, and earthed everything securely. Am stumped now. |
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Disco Frank
Fordmods Junkie
Age:29
Posts: 13279
Joined: 05 Nov 2004
Location: Perth WA, Australia
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| Posted: Sun Dec 05, 2004 10:05 pm Post subject: |
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were did u put the noise filter?
i had to put 2 on my old kingswood 1 on the alt and 1 on the back of the deck to stop all noise |
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ghiawar
Fordmods - Smokin em up
Age:31
Posts: 255
Joined: 06 Nov 2004
Location: Surrey Downs SA, Australia
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| Posted: Sun Dec 05, 2004 10:11 pm Post subject: |
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I have put it about 3 inches from the amp. in the boot.
I also have one for the headunit, and have never had buzzing through it.
The buzzing is not coming through the front speakers, only the back ones where the amp is hooked up.
Might have to try another one this week |
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kodak
Fordmods Parts Gopher
Age:31
Posts: 75
Joined: 11 Nov 2004
Location: Melbourne VIC, Australia
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| Posted: Sun Dec 05, 2004 10:14 pm Post subject: |
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| What size cable did you use? Have you got a good earth connection? |
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ghiawar
Fordmods - Smokin em up
Age:31
Posts: 255
Joined: 06 Nov 2004
Location: Surrey Downs SA, Australia
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| Posted: Sun Dec 05, 2004 10:16 pm Post subject: |
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Ummmm I used 15amp cable..... i think!
Very good earth connection, screwed twice direct to different parts of the body. |
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LG
Fordmods - Getting Side Ways
Age:23
Posts: 647
Joined: 05 Nov 2004
Location: Melbourne VIC, Australia
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| Posted: Sun Dec 05, 2004 11:04 pm Post subject: |
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| Try checking your crossovers and move them about if you can. And maybe even wrapping them in bubble-wrap. |
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kodak
Fordmods Parts Gopher
Age:31
Posts: 75
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Location: Melbourne VIC, Australia
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| Posted: Mon Dec 06, 2004 1:15 pm Post subject: |
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| 15 amp cable is way to small to be used with an amplifer. What are the specs of your amp? My guess is your getting significant voltage drop by using to small a cable |
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ghiawar
Fordmods - Smokin em up
Age:31
Posts: 255
Joined: 06 Nov 2004
Location: Surrey Downs SA, Australia
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| Posted: Mon Dec 06, 2004 3:51 pm Post subject: |
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Aaaah okay, off to the shops to buy bigger cable then.... any recommendations?
Do I have to change all wires or just the battery and earth ones? Because the remote wire from the stereo is small coming out of the headunit.
and which wire should I run?
It is a 250W amp, not too sure of the technical side of it, it came as a package with the speakers |
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kodak
Fordmods Parts Gopher
Age:31
Posts: 75
Joined: 11 Nov 2004
Location: Melbourne VIC, Australia
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| Posted: Mon Dec 06, 2004 4:14 pm Post subject: |
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mmm. What size fuse is in the amp?
As a start, I would recommend 8G cable which would be ok for anything up to 50 or 60 amps. You will need this for both your negative and positive leads. The remote is ok as a thin wire as not much current passes through it.
Have you got an inline fuse close to the battery on the positive lead? This is a must. no more than 30cm from the battery. |
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ghiawar
Fordmods - Smokin em up
Age:31
Posts: 255
Joined: 06 Nov 2004
Location: Surrey Downs SA, Australia
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| Posted: Tue Dec 07, 2004 8:33 am Post subject: |
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Yeah it has a fuse near the battery, with a 15 amp fuse in it.
The amp itself has only a 5 amp fuse.
Should I change these as well?
Will run new cable this weekend. |
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voids
Fordmods - Getting Side Ways
Age:24
Posts: 982
Joined: 10 Nov 2004
Location: middlemount QLD, Australia
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| Posted: Tue Dec 07, 2004 9:11 am Post subject: |
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| check all your connections on the speakers and amp and make sure they are all the correct pollarity, make sure you havent connected a negative to a positive in your speaker connections or anything like that. check all RCA leads and connections. |
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voids
Fordmods - Getting Side Ways
Age:24
Posts: 982
Joined: 10 Nov 2004
Location: middlemount QLD, Australia
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| Posted: Tue Dec 07, 2004 9:14 am Post subject: |
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| another thing did you use RCA leads or did you connect the amp through your speaker output of your head unit. |
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Ryan0001
Fordmods - Getting Side Ways
Age:21
Posts: 743
Joined: 20 Nov 2004
Location: Melbourne VIC, Australia
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| Posted: Tue Dec 07, 2004 9:23 am Post subject: |
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id look into gettin noise supressent spark plugs?
yeah put some fat cable in, like 4G from the battery and 8G from distribution boxes to the amp(s).
also ive seen this stuff that you wrap around the RCA cables when running them down the sides of a car, its like a aluminium sheilding s**t, havnt used it personally, but might pay lookin into it too 
good luck buddy  |
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aphexer
Fordmods - Getting Side Ways
Age:24
Posts: 657
Joined: 08 Nov 2004
Location: Eastern Suburbs VIC, Australia
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| Posted: Tue Dec 07, 2004 9:57 am Post subject: |
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make sure that earths are grounded fully to bare metal. ie: sand away any paint under earth
while ur at it, make sure that all other electrical components in ur car are wired properly, check alternator earths etc. |
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kodak
Fordmods Parts Gopher
Age:31
Posts: 75
Joined: 11 Nov 2004
Location: Melbourne VIC, Australia
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| Posted: Tue Dec 07, 2004 10:06 am Post subject: |
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| The amp has a 5 amp fuse? This equates to a power of 60 W. Sounds lilke a cheap amp (which could be your problem). |
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ghiawar
Fordmods - Smokin em up
Age:31
Posts: 255
Joined: 06 Nov 2004
Location: Surrey Downs SA, Australia
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| Posted: Mon Dec 13, 2004 7:14 pm Post subject: |
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Well I have fixed the problem.
Bought myself one of those amp wiring kits, came with the 8GA wire for power and earth, and 2 sets of RCA cables, installed it, and now sounds wicked!
Thanks for all the suggestions guys. |
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joolz
Fordmods - Getting Side Ways
Age:34
Posts: 2386
Joined: 06 Nov 2004
Location: Melbourne VIC, Australia
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| Posted: Mon Dec 13, 2004 10:29 pm Post subject: |
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| whats all this about power cable size and different fuses!!! ok the inteferance is either in the main power to the HU and or amps, or it is in the audio signal going to the amps. no one picked up on that he said its only one amp doing this. a quick test to narrow it down to power to the amp is to disconnect the RCA leads at the amp that is buzzing if the noise goes its NOT the power to the amp. next test is to connect the RCA leads that were going to the buzzing amp and connect them to the good amp, if it buzzes now its either a faulty RCA lead or a faulty line output from the HU. and to doubly make sure its not the amp at fault connect the RCA leads from the good amp and then connect to the buzzing amp. Its probarbly only a faulty RCA lead and not fuses, spark plugs, extra sheilding, noise suppressors...better to find the fault instead of covering it up.. |
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