Help With Car Audio

Discussion in 'General Electronics Chat' started by SlabBoyzOverTexas, Dec 20, 2011.

  1. SlabBoyzOverTexas

    Thread Starter New Member

    Dec 20, 2011
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    I recently had 2 CVR 15inch kickers put in my car on a 2000wwatt hifonics amp, it worked fine for bout a week then today out of the blue my speakers just started bassing non stop i had to unplug my RCA jacks to get it to shut off. Any idea what it could be
     
  2. MrChips

    Moderator

    Oct 2, 2009
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    Maybe it's just your ears still ringing!
     
  3. SlabBoyzOverTexas

    Thread Starter New Member

    Dec 20, 2011
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    LOL No sir its not that, what im saying is that the subbs put out a constant bass and no longer follow anything coming from the music playing
     
  4. MrChips

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    Maybe you're getting feedback from the speakers back into the inputs somehow.
    Start off with the volume at low and increase the volume slowly. Does it work as it should or are you getting constant bass? What does constant bass sound like?
     
  5. strantor

    AAC Fanatic!

    Oct 3, 2010
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    try getting a headphone>RCA splitter and plug a ipod into it. if it works, then its your head unit.
    EDIT: plug the splitter into the RCA cables that go into the head unit, not directly at the amp.
     
  6. Adjuster

    Well-Known Member

    Dec 26, 2010
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    A 2kW car audio system! The mind boggles: do you need an uprated generator to cope with that?
     
  7. strantor

    AAC Fanatic!

    Oct 3, 2010
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    not if you just listen for a few seconds at a time :)
     
  8. praondevou

    AAC Fanatic!

    Jul 9, 2011
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    First of all you need very comprehensive neighbors.
     
  9. Kermit2

    AAC Fanatic!

    Feb 5, 2010
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    A component failure that allowed oscillation in the circuit could be responsible. Only testing will reveal if it is input related or in the amplifier circuit itself. To tell you what exactly is wrong from your short description over an internet forum is beyond the ability of most anyone. If it is a constant freq, constant volume 'mono' tone coming out of the speaker with no hint of any program material then the output stage would be where I would start looking. A problem in the speaker may be causing high power oscillations, easily checked by attaching another speaker
     
  10. Adjuster

    Well-Known Member

    Dec 26, 2010
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    I know what you mean, but British English would not use "comprehensive" in that sense: we would more likely say "tolerant".

    These quirks of language intrigue me: is this an American / Canadian English usage, or perhaps from French?
     
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  11. MrChips

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    I think he meant "comprehending".
     
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  12. praondevou

    AAC Fanatic!

    Jul 9, 2011
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    Oops, I see. It's english from someone who learned it at school and doesn't speak it so much...:D

    Just learned something, nice. French isn't my first language neither.:rolleyes:

    Yeah i meant tolerant, I had some very bad experiences, I guess I wasn't a very comprehending/tolerant neighbor. I'm not saying the OP is one of THOSE guys. :)
     
  13. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
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    I had 3.5 kW 15 years ago. 151 dBSPL, got some Trophys, and say "Huh? What?" a lot now.

    Sadly, after installation, it cost about $2/watt, and sold for $0.25/watt There's a huge markup in car audio, and that HiFonics amp isn't a very good one. Get a solid amp like Rockford, Earthquake, or Xtant.

    Your amp probably died.
     
    Last edited: Dec 21, 2011
  14. SlabBoyzOverTexas

    Thread Starter New Member

    Dec 20, 2011
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    The best way i can describe the situation is soon as i insert the RCA into the amp the subs have a constant bass coming from them even when there is no music playing, its a humming type sound i will upload a audio file to show the sound
     
  15. strantor

    AAC Fanatic!

    Oct 3, 2010
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    if you disconnect the RCA coming out of your head unit, instead of disconnecting the RCA going into the amp, do you still get the sound?
     
  16. SlabBoyzOverTexas

    Thread Starter New Member

    Dec 20, 2011
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    Yup still get the same sound, i would take the easy way and go to the car audio shop but $90 just to troubleshoot is a little insane
     
  17. strantor

    AAC Fanatic!

    Oct 3, 2010
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    ok, so
    amp>-------->RCA cable>--------->head unit (all connected, you get buzz)
    amp>-------->RCA cable>--------X head unit (RCA disconnected from head unit, you get buzz)
    amp X------>RCA cable>--------->head unit (RCA disconnected from amp, no more buzz)

    is that correct? If so, pull the RCA cable out, replace it, and route the new one a different way, away from all other wiring.
     
  18. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
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    Can you put your sub inputs into your mid-range/high amp and see if the mid-range amp starts oscillating?

    If you don't have a mid-range amp, do you know somebody else with a sub amp that you could swap out for testing?

    Can you buy a new amp of reputable brand, and return it if it doesn't fix the problem? If so, that's the most straightforward route, you could then troubleshoot and fix this amp.
     
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