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Amp problem

Amp problem

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spud1973
Member
240
04-05-2018, 11:39 AM
#1
Hope someone can help I have got a kenwood amp and alpine sub now when the eninge is off it all works fine and dandy. But when the engine is started the sub starts thumping no music playing it just thumps on its own accord.
I have used a autoleads 750w power leads.
Now what I think I have done is earthed it out in the wrong place under one of the luggage strap loops.
Any ideas on a better earthing point please tell me
Thanks Pete
spud1973
04-05-2018, 11:39 AM #1

Hope someone can help I have got a kenwood amp and alpine sub now when the eninge is off it all works fine and dandy. But when the engine is started the sub starts thumping no music playing it just thumps on its own accord.
I have used a autoleads 750w power leads.
Now what I think I have done is earthed it out in the wrong place under one of the luggage strap loops.
Any ideas on a better earthing point please tell me
Thanks Pete

is300_dino
Posting Freak
3,556
04-05-2018, 12:51 PM
#2
it needs to be earthed onto the chassis most people use the rear light fixings to do this

jae 2010 best lexus category show and shine winner
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is300_dino
04-05-2018, 12:51 PM #2

it needs to be earthed onto the chassis most people use the rear light fixings to do this


jae 2010 best lexus category show and shine winner
jae 2010 ice outlaw award 2nd place
jae 2011 ice outlaw award 1st place

Dark Samurai
Posting Freak
4,957
04-05-2018, 12:56 PM
#3
Those hook up points are on Chassis though?

Lexus IS300 Sportcross in Platinum Ice.
Click here for garage.

PSN ID: O3107 
Dark Samurai
04-05-2018, 12:56 PM #3

Those hook up points are on Chassis though?


Lexus IS300 Sportcross in Platinum Ice.
Click here for garage.

PSN ID: O3107 

ormi
Posting Freak
3,006
04-05-2018, 01:05 PM
#4
oli is right matey any metal on the car as long as its not rubber mounted can be used as an earth....
just check all your connections mate from your fuse to your remote also the earth both ends

[Image: ormiedit1-2.jpg]
TTE supercharger,pr0lex manifold,hks fcd,larger intercooler,apexi induction kit,silicone hose kit,IK22's,polished engine parts,TTE front bumper mod'd for intercooler,TRD side skirts,TRD rear lip,JDM headlights and fogs,10k hid headlights 8k full beam,L8XSS p/plate,fog/brake/light conversion,18"fox rs's,lowered 90mm(f)100mm®,moleys under bars,yellow trd anti rollbars,full stainless exhaust,carbon fiber intake plus so much more
ormi
04-05-2018, 01:05 PM #4

oli is right matey any metal on the car as long as its not rubber mounted can be used as an earth....
just check all your connections mate from your fuse to your remote also the earth both ends


[Image: ormiedit1-2.jpg]
TTE supercharger,pr0lex manifold,hks fcd,larger intercooler,apexi induction kit,silicone hose kit,IK22's,polished engine parts,TTE front bumper mod'd for intercooler,TRD side skirts,TRD rear lip,JDM headlights and fogs,10k hid headlights 8k full beam,L8XSS p/plate,fog/brake/light conversion,18"fox rs's,lowered 90mm(f)100mm®,moleys under bars,yellow trd anti rollbars,full stainless exhaust,carbon fiber intake plus so much more

Dark Samurai
Posting Freak
4,957
04-05-2018, 01:19 PM
#5
ormi oli is right matey any metal on the car as long as its not rubber mounted can be used as an earth....
just check all your connections mate from your fuse to your remote also the earth both ends

For the first time in my life Smile

Lexus IS300 Sportcross in Platinum Ice.
Click here for garage.

PSN ID: O3107 
Dark Samurai
04-05-2018, 01:19 PM #5

ormi oli is right matey any metal on the car as long as its not rubber mounted can be used as an earth....
just check all your connections mate from your fuse to your remote also the earth both ends

For the first time in my life Smile


Lexus IS300 Sportcross in Platinum Ice.
Click here for garage.

PSN ID: O3107 

toxo
Posting Freak
4,843
04-05-2018, 01:50 PM
#6
It could be a bad earth somewhere else causing the problem, once you're happy that the wiring to the amp and stereo are spot on, if the problem persists then check out the engine ground straps and the other big wires (alternator, battery etc).
toxo
04-05-2018, 01:50 PM #6

It could be a bad earth somewhere else causing the problem, once you're happy that the wiring to the amp and stereo are spot on, if the problem persists then check out the engine ground straps and the other big wires (alternator, battery etc).

spud1973
Member
240
04-05-2018, 02:09 PM
#7
Thanx guys will check every earth im sure thats what it is when the tunes are playing it thumps hard. As I said it when there is no music and the head unit is on also if im driving and use the brakes or indicate it does it. Weird as all the systems ive wired into my other various cars have never done this.
spud1973
04-05-2018, 02:09 PM #7

Thanx guys will check every earth im sure thats what it is when the tunes are playing it thumps hard. As I said it when there is no music and the head unit is on also if im driving and use the brakes or indicate it does it. Weird as all the systems ive wired into my other various cars have never done this.

spud1973
Member
240
08-05-2018, 08:31 AM
#8
All sorted made the earth better and turne the amp down a little and hey presto. Cheers guys for the help:biggrin:
spud1973
08-05-2018, 08:31 AM #8

All sorted made the earth better and turne the amp down a little and hey presto. Cheers guys for the help:biggrin:

FirebirdPhil
Posting Freak
7,101
08-05-2018, 10:26 AM
#9
My post was going to say remove paint from the farthing point, as you have sorted it well done!!

"Life's goal is not to arrive safely at the grave in a well preserved body. But, rather to skid in sideways........
totally worn out and broken, shouting 'Holy ****, WHAT A RIDE!'"
FirebirdPhil
08-05-2018, 10:26 AM #9

My post was going to say remove paint from the farthing point, as you have sorted it well done!!


"Life's goal is not to arrive safely at the grave in a well preserved body. But, rather to skid in sideways........
totally worn out and broken, shouting 'Holy ****, WHAT A RIDE!'"

spud1973
Member
240
08-05-2018, 12:20 PM
#10
Again thanks for the help guys I have give each one of you +1 rep
spud1973
08-05-2018, 12:20 PM #10

Again thanks for the help guys I have give each one of you +1 rep

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