Why am I blowing amps?

Discussion in 'Car Stereo Amplifiers' started by LowRam, Feb 22, 2009.

  1. LowRam

    LowRam Full Member

    Here is what I have. Alpine CDA 9886 HU, Fosgate P5002, 2 JL W3v3 8 ohm subs. P2002 running the door speakers.

    All was installed buy a shop. It was installed 3 months ago and worked fine until about a week ago. Then the P500 went out. No clipping, just stopped working. Took it back they swapped out the amp. Again worked great for 5 days and just quit again. Any ideas as to what could be causing this? Here are the settings on the amp if that helps. Oh subs are being run parreal.

    Gain: 6/11

    Freq Hz:340

    Punch eq: 1/2 way

    LP switch

    HU settings Volume 21-26/35

    Sub: 11-13/15

    BAss: -3 to -1

    I am a total noob so please try to make responses easy to understand. I would just like some educated guesses to throw at them if it happens again. It also doesnt seem to sound as good as before. Bass is kinda lacking. I am assuming they turned it down from previous settings.
     
  2. cccullen

    cccullen Full Member

    sounds more like a wiring issue to me rather than the settings on the amps.

    First off, who installed it? Secondly, is you add all of the fuses in the amps what is the total? check the fuse under the hood and make sure that the total of the fuses in your amps equals that of the fuse near your battery.

    Recheck you power and ground connections as well.
     
  3. LowRam

    LowRam Full Member

    I thought it was wiring as well. But it has power to it (power light on amp is lighted). Should I still check the fuses if it has power? Or could it still be a wiring issue?

    When I was in there today I was told that I could be driving the subs to hard and "bottoming them out" which is blowing the amp. But when they sold me the components I was told that the subs could handle the power.

    Thaqnks for your reply.
     
  4. cccullen

    cccullen Full Member

    I would think that your subs would give out if that would be the case. I believe it's a wiring issue still.

    Make sure the fuse (near your battery) equals the total of all your fuses in your amps. if the fuse under the hood is a lot more than the total of your fuses in your amps then the fuse is useless cuz it's not protecting anything. You may also want to check the fuses in the amps to make sure they are all okay as well.

    When checking your wiring, make sure there aren't any loose stands of wires touching each other at the amp itself.

    where are the amps grounded to?

    Lastly, make sure all your connections are secure.
     
  5. aznboi3644

    aznboi3644 Full Member

    turn down your crossover frequency to 60-80Hz.
     
  6. LowRam

    LowRam Full Member

    Since I am a noob could you please explain why that is going to help? I am going to try it just curious as to why. Thanks for your reply.
     
  7. pedro quiroga

    pedro quiroga Well-Known Member

    sub bass doesnt play that high
     
  8. aznboi3644

    aznboi3644 Full Member

    much easier to clip the signal...more power for the actual subwoofer. Power not used trying to play MID and MIDBASS frequency. That is why it is a subwoofer.

    Please read as much as you can at www.bcae1.com
     
  9. LowRam

    LowRam Full Member

    So I had a chance to check the wiring and what I found was a sh***y ground imho. It was grounded to the cab floorboard with a sheet metal screw that when i touched it it wiggled pretty easy. Replaced that with a little bolt and nylon nut to make sure it stays tight. Could not find any visible fuses on the outside of the amp and dont want to crack it open because of the warranty. Ran out of time so I will have to check speaker wiring in a couple days. Thanks for your help.
     
  10. LowRam

    LowRam Full Member

    Thanks for the link. Will give it a read.
     
  11. LowRam

    LowRam Full Member

    Also what is the purpose of the Punch eq dial? And what roughly should the setting be?