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sub randomly cuts out then returns?

Discussion in 'Car Audio' started by mitchone, Aug 4, 2013.

  1. Deuce

    Deuce Super Stock

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    Do you have an amp you could borrow from a mate for a week or two? or swap amp's with his set-up and see if the problem goes with it.
     
  2. mitchone

    mitchone New Member

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    yeah ive been trying to track down a spare amp off someone. alot of my mates need there amps for obvious reasons. theyre all heavy hitters in the noise department haha.
     
  3. DevilDRake

    DevilDRake Braaaap

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    This happened to me just because wasn't earthed properly. Didn't go into protection mode or anything and it looked perfectly earthed. Was not. haha
     
  4. Tasmaniak

    Tasmaniak Not a valid input....

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    The two wires that go from the speaker terminals and disappear inside the sub to the voice coil.... when you look at them.. you will understabd the name.

    Next time it happens yiu can try pushing on the cone of sub (use your whole palm) and see if it kicks in again. If it does... tinsel leads, if it doesnt, may still be tinsel leads.

    Usually not worth repair but depends on the sub. I had a 10" years ago that I think I resoldered about 5 or 6 times. Just kept overpowering it day in and day out.
     
  5. mitchone

    mitchone New Member

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    figured it out! hahaha. ran my sub off my mates amp with the huge mess of speaker wire in my shed. sub cranks pretty hard off his amp so im now assuming mines blown. not good for a 3 month old amp haha. gotta do some hunting for this receipt now for warranty.
     
  6. Deuce

    Deuce Super Stock

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    can you post a pic of your 'blown' amp ??
     
  7. mitchone

    mitchone New Member

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    yeah i can do it tomorrow. i still cant see anything through the back of it to show its blown though. might try moving the ground point or sanding into the metal a bit on saturday so its pretty decent see if that helps.
     
  8. Nic92

    Nic92 Active Member

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    does the amp turn on? play music and use a multi meter on the sub outputs and test AC voltage and see if it puts out anything.
     
  9. Tasmaniak

    Tasmaniak Not a valid input....

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    You've taken them out of a harsh enviroment filled with vibration, bumps and knocks and put them into a safe cushy shed. Sorry mate, it's a little inconclusive. But you may be right in saying its the amp. Just don't think it's conclusive.
     
  10. mitchone

    mitchone New Member

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    yeah hadnt thought to run a multi meter off the out puts yet. ill do that tomorrow aswell. but yeah turns on fine but doesnt show any signs of protection mode or anything.
     
  11. Nic92

    Nic92 Active Member

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    If you have an O-Scope or know anyone with one, you could actually see the signal it is putting out too.
     
  12. mitchone

    mitchone New Member

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    nah i agree dude. just heading in that direction at this point. i have to go to autobarn tomorrow any way so i was gonna see if the audio installer had any sortve inputs while i was there.
     
  13. mitchone

    mitchone New Member

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    any one got some good factory ground spots for a vy ute? ill smack my ground on to one of them first and see if that helps.
     
  14. Tasmaniak

    Tasmaniak Not a valid input....

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    One you make yourself mate.

    Sand back some bare metal, use several self drilling screws to lock into place and away you go.
     
  15. mitchone

    mitchone New Member

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    yeah well thats what its grounded as now. was just wondering if anyone knew of some factory ones but see if it makes a difference.
     
  16. mitchone

    mitchone New Member

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    moved my ground and i was getting about 10 seconds of sound from my sub when i turn my car on but its stopped again now.
    multimeter reads nothing at all unless i can quickly catch it during the first few seconds when my sub randomly works. but im not quite fast enough to do that haha.
    was going to open my sub and check those tinsel leads in it but i ran out of time. hopefully i get the chance on monday.
    anything else you guys reckon i should check?
     
  17. Deuce

    Deuce Super Stock

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    Check where power and earth cables connect to amp. Check amp wire to battery clamp connection, and what gauge wire are you using? Also check connections into and out of your fuse/circuit breaker.
     
  18. mitchone

    mitchone New Member

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    yeah checked the connections and swapped the inline fuse again. im pretty sure its 4 gauge for power and ground.
    my sub ran all the way home tonight but my stereo was down quite low because i had a killer head ache haha. if i turn it up it cuts out after a few seconds regardless of whether im going fast or slow then doesnt come back. but it wasnt going at all yesterday. it cant make its mind up.
    so im thinking maybe somethings causing my amp to not get enough power? all though for 3 month its been fine so i thought that would have shown up months ago?
     
  19. jay87

    jay87 New Member

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    Mine does the same thing. Running a p3 600wrms Rockford sub with a 600wrms alpine amp. Except I know what my problem is. Because of the distance between battery and amp I should be running 2 or 0 gauge from battery to boot to a capacitor and a 4 gauge power and ground to amp off the capacitor. My cable gets hot and has already popped three inline fuses and melted 2 fuse holders because of the excessive power draw. That's with it turned down to a suitable bass level. Could still get more if I upgrade wiring.
     
  20. mitchone

    mitchone New Member

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    yeah but mines from the battery to behind the driver seat. probably not half the distance haha.
     

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