Car Speaker Install

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19 posts

Geek

#735416 20-Dec-2012 12:02

The speaker cuts out.I am wondering if it is caused by a short happening somewhere.
The wiring is all correct and secure. .

As the bass comes in, i am thinking the speaker vibrates causing a short, maybe between the screws and the door. This causes both front door speakers to cut out, but is caused by only one speaker.

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Vocus

#735418 20-Dec-2012 12:04

The frame shoudl be isolated from the terminals, so I doubt it.

Check all the wiring. Also wrap the terminals with insulation tape if in doubt.

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#735430 20-Dec-2012 12:16

Closeup of the terminals on the back of the speaker might give more information.

xReeceS02x

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#735434 20-Dec-2012 12:20

I have my speaker secured directly to the metal door frame, through the holes i drilled myself. If i unscrew the speaker from the door while it is on, small sparks happen by the screw and hole. This is causing it to cut out.
Will post more pics shortly.

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#735443 20-Dec-2012 12:29

xReeceS02x: I have my speaker secured directly to the metal door frame, through the holes i drilled myself. If i unscrew the speaker from the door while it is on, small sparks happen by the screw and hole. This is causing it to cut out.
Will post more pics shortly.

Seems like one of your terminals is shorted to the frame of the speaker. It shouldn't be. You will blow up your headunit if you leave it like this...

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#735444 20-Dec-2012 12:32

As above, that doesn't sound good. Show us a photo of how you've connected the wires to the speaker.

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Technofreak

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#735446 20-Dec-2012 12:33

xReeceS02x: The speaker cuts out.I am wondering if it is caused by a short happening somewhere.
The wiring is all correct and secure. .

As the bass comes in, i am thinking the speaker vibrates causing a short, maybe between the screws and the door. This causes both front door speakers to cut out, but is caused by only one speaker.

How do you know it's only one speaker that causes it?

I think you may be on the right line of thought re the vibration causing the problem, but I'd be very surprised if the problem was a short between the mounting screws and the door. By their very design the screws will be providing an electrical contact between the speaker and the door all the time not just through vibration. Also I'd be very surprised that the speaker design allows one side of the speaker coil to be earthed.

It is possible that there is a fault in one speaker which allows the coil to come in contact with the magnet and the insulation has rubbed off the coil allowing the coil to go to earth via the magnet. This contact may only occur at extreme travels of the speaker cone as when there is a lot of bass. Plus it will only be a problem when the speaker is mounted with the screws as there will be no earth present without the screws making contact with the door frame.

If you can prove the fault is being caused by only one speaker you could try moving that speaker to another location to see if the fault moves with the speaker. This should prove the wiring or the speaker.

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Technofreak

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#735451 20-Dec-2012 12:38

xReeceS02x: I have my speaker secured directly to the metal door frame, through the holes i drilled myself. If i unscrew the speaker from the door while it is on, small sparks happen by the screw and hole. This is causing it to cut out.
Will post more pics shortly.

I presume the sparks are only happening at the one speaker. Some photos of the connection area may help. One thing to check is the flexible wires that go from the connection terminals on the speaker to the coil. One of these may be touching the speaker frame when there is plenty of bass or volume present. or unlikely, one of the mounting screws is touching one of these wires.

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#735454 20-Dec-2012 12:41

Technofreak: Also I'd be very surprised that the speaker design allows one side of the speaker coil to be earthed.

@Technofreak: I have seen this by design. I do not know how common it might be. I have done very little with car audio. In many amplifier designs one of the speaker wires is always negative and the same for all speakers. Is it not the same in car audio?

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#735456 20-Dec-2012 12:45

gzt:
Technofreak: Also I'd be very surprised that the speaker design allows one side of the speaker coil to be earthed.

@Technofreak: I have seen this by design. I do not know how common it might be. I have done very little with car audio. In many amplifier designs one of the speaker wires is always negative and the same for all speakers. Is it not the same in car audio?

Correct WRT amp designs, but I've never seen speakers that have one side go to earth, though I'm willing to admit it is possible.

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Vocus

#735459 20-Dec-2012 13:01

gzt:
Technofreak: Also I'd be very surprised that the speaker design allows one side of the speaker coil to be earthed.

@Technofreak: I have seen this by design. I do not know how common it might be. I have done very little with car audio. In many amplifier designs one of the speaker wires is always negative and the same for all speakers. Is it not the same in car audio?

No. Most car audio amps run in bridge mode, and there isn't a common earth wrt the speaker outputs.

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#736179 21-Dec-2012 22:39

How's progress with the speakers?

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xReeceS02x

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#738032 28-Dec-2012 13:33

Technofreak: How's progress with the speakers?

It seems alright now, maybe it has just adjusted since, or just had to let it burn in, not quite sure.

Everything is working now. But I am wondering how can I minimize the vibration and rattling the speaker makes with the door ? The speakers are only at like say 50% power, my ute is 20yrs+ old and the door frame is just bare metal framing. The vibrations are less obvious when I am driving say on the motorway.

I have seen sound deadening products but have heard they arent as efficient in reducing vibrations and are more for SPL. My friend told me to add weight to the door frame, which I tried but they tend to move around in the door frame. Any tips/recommendations ?

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#738043 28-Dec-2012 14:22

If you put pressure on the door panel does the noise stop?

Technofreak

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#738054 28-Dec-2012 14:55

xReeceS02x:
Technofreak: How's progress with the speakers?

It seems alright now, maybe it has just adjusted since, or just had to let it burn in, not quite sure.

Everything is working now. But I am wondering how can I minimize the vibration and rattling the speaker makes with the door ? The speakers are only at like say 50% power, my ute is 20yrs+ old and the door frame is just bare metal framing. The vibrations are less obvious when I am driving say on the motorway.

I have seen sound deadening products but have heard they arent as efficient in reducing vibrations and are more for SPL. My friend told me to add weight to the door frame, which I tried but they tend to move around in the door frame. Any tips/recommendations ?

These sorts of faults don't just come right by themselves in my experience, you've done something, perhaps inadvertently, or something has occurred to resolve the problem you had. Burning in is an OWT in my opinion and isn't a reason your problem is resolved or has disappeared.

I think you're right when you say sound deadening products are not for vibrations. As to the vibration, what is vibrating? The window in it's slides?, the winder mechanism?, the door trim panel? the speakers against the door frame? You need to find out what is causing the noise. Try holding onto various items when the vibration is there to see if you can stop the vibration. You will then know for sure where the source of the vibration is and then formulate a course of action.

It may be that the door frame where the speakers are mounted isn't very rigid and the speakers are causing the door frame to flex as the speaker volumes gets louder. You may have to find a way to make the frame more rigid or stop it from flexing.

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