Rob
Member
Registered: 9th Jul 01
Location: hull
User status: Offline
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Alright
fitted an amp sub components system to me mates car.
first day he had it no problems
second day a crackling like static kept coming from the speakers
stopped from a while
today hes popped round been for a drive really loud noise like static crackling tho speakers but only on bumpy roads.
I have checked the earth its fine both ends. the noise is coming from mids tweets and sub so its something coming from the amp. dunno if its coming from the headunit and just getting amplified from the amp into the speakers. or if his amp is fucked its a jbl gto amp brand new hes dropping em an email. his power cable is run down the left hand side of his car and the phono down the right. I had the same setup with no problems at all of interference.
just wondering if anybody could shed some light on it.?
cable nicked?
amp fucked?
something else?
I dunno
do you?
cheers lads
Rob
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Trucido
Member
Registered: 14th Jun 03
Location: Bristol
User status: Offline
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checked the earth?? is it a decent earth??
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Rob
Member
Registered: 9th Jul 01
Location: hull
User status: Offline
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yep its fine nothing wrong with earth
ttt
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cdcool1
Member
Registered: 9th Jun 02
Location: Scunny
User status: Offline
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does it happen with both CD and radio? or just CD or just Radio?
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Rob
Member
Registered: 9th Jul 01
Location: hull
User status: Offline
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happens mainly on the cd but its not the cd jumping.
taking it all apart this afternoon and refitting it to check all the cable etc etc.
anymore ideas?
never heard of out like this before to be honest
rob
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Dom
Member
Registered: 13th Sep 03
User status: Offline
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does the sound increase in pitch when he punts it? Does the crackling sound stay on, or is like short bursts? If its the later, it could be spikes on the power line...might be worth checking with a scope mate 
i would also test the output with a scope from the amp, like preouts on the amp as well as speaker outs and see if the sine-wave is becoming distorted. Test it before the amp (preouts from HU) and after as it will tell you if the amp is fooked or its the HU
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Scotty_B
Member
Registered: 11th Jun 03
Location: East Kilbride
User status: Offline
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This happened when I amped my components, it turned out the amp was knackered.
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Rob
Member
Registered: 9th Jul 01
Location: hull
User status: Offline
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i asked me mate to do one thing and that was make sure it was a good earth connection guess what!
earth sorry guys
cheers anyways 
rob
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cdcool1
Member
Registered: 9th Jun 02
Location: Scunny
User status: Offline
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at least its sorted now anyway 
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Rob
Member
Registered: 9th Jul 01
Location: hull
User status: Offline
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aye cheers n e ways
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