gooner_47
Member
Registered: 20th Jul 04
Location: Bexhill/Croydon
User status: Offline
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Just installed an active sub, hooked everything up and when it turns on, the sub makes a weird rumbling, crackling noise when you turn up the level and crossover freq. This happens even with no volume from the hu
Does anyone know what this could be?
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SteveW
Member
Registered: 15th Jul 02
Location: Up in the clouds
User status: Offline
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where are all your wires running down the car ?? are they all on one side ?
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gooner_47
Member
Registered: 20th Jul 04
Location: Bexhill/Croydon
User status: Offline
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No passenger side I've run power and remote, drivers side is the RCA on its own so I don't think it's interference
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Melville
Member
Registered: 4th Jun 03
Location: Newcastle upon Tyne
User status: Offline
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Check the earth is ok and then check for dodgy cables failing that
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Jake
Member
Registered: 24th Jan 05
User status: Offline
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and also check the RCA cable is plugged it properly at both ends
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gooner_47
Member
Registered: 20th Jul 04
Location: Bexhill/Croydon
User status: Offline
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I'm pretty sure the earth is OK? I think I scratched off enough paint. What does the earth actually do and what problems can it cause if it's not right?
The RCA is plugged into the Low/Subwoofer output from the hu, and the 2 input terminals on the amp - that's right aint it?
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Melville
Member
Registered: 4th Jun 03
Location: Newcastle upon Tyne
User status: Offline
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Yeah sounds right to me. The earth completes the electrical circuit basically so if its not connected properly then it may be the problem. Try moving the earth from where every it is onto the screw which hiolds the seat belt connector in behind the back seats.
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gooner_47
Member
Registered: 20th Jul 04
Location: Bexhill/Croydon
User status: Offline
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That's where I've got it at the moment.
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gooner_47
Member
Registered: 20th Jul 04
Location: Bexhill/Croydon
User status: Offline
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The RCA has red and black connections, the amp and hu have red and white - does the black go to the white? That's how I've got it at the moment
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Melville
Member
Registered: 4th Jun 03
Location: Newcastle upon Tyne
User status: Offline
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Yeah providing they are he correct way round on your head unit also??
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gooner_47
Member
Registered: 20th Jul 04
Location: Bexhill/Croydon
User status: Offline
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Yea both are the same, red to red, black to white. This is really annoying me now, I'm gonna have to take it somewhere for them to have a look at
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