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WTF - 3/17/2007 3:42:11 PM

gyea

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I installed an amp and aftermarket speakers into my mustang but am getting an annoying humming threw all 4 speakers but only when the car is running is there anything I can do to eliminate this or should I just buy a filter??

Post #: 1

RE: WTF - 3/17/2007 3:43:48 PM

PReal

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YOu more then likely ran your low voltage rca's next to your high current power wire. Its called interference.

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RE: WTF - 3/17/2007 3:50:51 PM

gyea

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nope they are on opposite sides of the car

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RE: WTF - 3/17/2007 5:01:52 PM

gyea

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anyone else?? ADVICE!?!?!

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RE: WTF - 3/17/2007 5:19:23 PM

kenv

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I`m no expert, but when my install made noises, I had to put in a in line filter to kill the noise from the alternator

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Post #: 5

RE: WTF - 3/17/2007 7:32:55 PM

ttocs

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A filter is a band aid, it covers up the problem but doesn't fix it.

you left the factory radio in and yer using an loc?

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Post #: 6

RE: WTF - 3/17/2007 8:24:19 PM

gyea

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all after market jvc head unit mb quartz component speakers all round running off a older 4 channel kenwood amp till I got the spare 600$ to spring for a nicer amp

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Post #: 7

RE: WTF - 3/17/2007 10:50:08 PM

Ultimeas

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Might be because the gain is too high?

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Post #: 8

RE: WTF - 3/17/2007 11:02:34 PM

gyea

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ill check it in the morning

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Post #: 9

RE: WTF - 3/18/2007 12:46:02 PM

ttocs

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where is it grounded? try a different source(mp3 player with a headphone to RCA cable) and see if it goes away. You can also try running a 2nd set of rca's just temporarily above the carpet to see if it helps. you could have a bad rca.

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Post #: 10

RE: WTF - 3/18/2007 1:23:53 PM

PReal

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Your RCA's still might be next to a high current source. You still might consider moving around your RCA to see if you have a power wire for something like your fuel pump running next to them.

Another idea would be how you can any extra rca cable. In general you need to run the extra in loops.

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Post #: 11

RE: WTF - 3/19/2007 2:23:22 AM

01vertcobra

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Does the humming frequency change when you rev your motor? If so, its alternator whine and you have one of three things. (1) Bad RCA's (2) RCA's running next to power wires (3) A common ground with your alternator. Where do you have it grounded anyway and what side of the car are you running your RCA wires?

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Post #: 12

RE: WTF - 3/19/2007 2:56:37 AM

gyea

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yes it does get louder when accelerating the rca wire is run down the passenger side and the amp is grounded in the trunk to a random bolt... (I grinded the spot to make sure of a good connection)

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Post #: 13

RE: WTF - 3/19/2007 7:50:20 AM

Insanestang

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Make sure the bolt u used as the ground is actually into the frame of the car. your bolt could not be grounding correctly.

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Post #: 14

RE: WTF - 3/19/2007 12:19:19 PM

PReal

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If it oscillates with acceleration it is more then likely interference with your rca cables.

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Post #: 15

RE: WTF - 3/19/2007 12:26:05 PM

ttocs

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disconnect the rca's from the deck and see if the noise is still there. If it is then it is behind the radio in the rca's or amp, if it stops then you need to check your deck.

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Post #: 16

RE: WTF - 3/19/2007 4:07:45 PM

gyea

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yeah they dont hum unplugged ill buy a new cable this weekend

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Post #: 17

RE: WTF - 3/20/2007 12:36:42 AM

01vertcobra

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If that doesn't work, ground your ground wire from your deck somewhere else. Sometimes that will cure it right up.

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2001 True Blue Convertible Cobra
-K&N cold air
-Bassani off road x-pipe
-Bassani Cat Back exaust
-MGW short throw shifter

Future mods
-JLT CAI
-Tokico D-spec shocks
-H&R springs
-??????

(in reply to gyea)

Post #: 18

RE: WTF - 3/20/2007 1:49:14 PM

ttocs

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if the noise stops with teh rca's disconnnected from the deck your noise could very well be comming from the deck. Try running a quick set of cables above the carpet and see if it stops.