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  4. sub/amp problems

sub/amp problems

Scheduled Pinned Locked Moved ICE and Detailing
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  • wesholeW Offline
    wesholeW Offline
    weshole
    wrote on last edited by
    #2

    Unhook the sub and see if it still does this. If it doesnt. its your sub that is blown. If it does, your amp needs repair or replacement.

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    • civic91C Offline
      civic91C Offline
      civic91
      wrote on last edited by
      #3

      well the protection light doesn't flash when the subs are disconnected, so looks like they are blown.

      04 Toyota Celica Gts

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      • wesholeW Offline
        wesholeW Offline
        weshole
        wrote on last edited by
        #4

        one probably is for sure. but remove them and verify no wires are touching. then, hook one up at a time to see if one or both cause it to go into protect. If you can, have someone measure resistance of each sub with a multimeter to see what the ohms of resistance are.

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        • blackcougarB Offline
          blackcougarB Offline
          blackcougar
          wrote on last edited by
          #5

          And if your sub is blown, I have a sweet 12" MTX 9500 series for you 🙂

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          • civic91C Offline
            civic91C Offline
            civic91
            wrote on last edited by
            #6

            well i am just starting to look at subs again so send me some info on the sub and a price.

            04 Toyota Celica Gts

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            • PSiedTSiP Offline
              PSiedTSiP Offline
              PSiedTSi
              wrote on last edited by
              #7

              civic91;323033 wrote:
              well i am just starting to look at subs again so send me some info on the sub and a price.

              Did you check the resistance to make sure it's blown?

              At first I did it for fun, then I realized I made the investment and had to do it!

              92 Talon AWD 6/4bolt [EMAIL="[email protected]"][email protected][/EMAIL]
              95 240SX SE SR20DET [EMAIL="[email protected]"][email protected][/EMAIL]
              1993.5 Supra Hardtop...Sold
              Next project? 6cyl, 6spd?

              > spanish-rice;237125 wrote:
              > at first i thought the title said beer truck drivers needed... In which case i accidently put my two weeks in at work.

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              • civic91C Offline
                civic91C Offline
                civic91
                wrote on last edited by
                #8

                pretty sure they are blown when i push down on them they make a bit of a grinding noise

                04 Toyota Celica Gts

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                • PSiedTSiP Offline
                  PSiedTSiP Offline
                  PSiedTSi
                  wrote on last edited by
                  #9

                  civic91;323039 wrote:
                  pretty sure they are blown when i push down on them they make a bit of a grinding noise

                  Yep lol

                  At first I did it for fun, then I realized I made the investment and had to do it!

                  92 Talon AWD 6/4bolt [EMAIL="[email protected]"][email protected][/EMAIL]
                  95 240SX SE SR20DET [EMAIL="[email protected]"][email protected][/EMAIL]
                  1993.5 Supra Hardtop...Sold
                  Next project? 6cyl, 6spd?

                  > spanish-rice;237125 wrote:
                  > at first i thought the title said beer truck drivers needed... In which case i accidently put my two weeks in at work.

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                  • R Offline
                    R Offline
                    RuckU2
                    wrote on last edited by
                    #10

                    I had the same problem with a Phoenix Gold amp. Would go into protect mode. I blamed the sub, had it warrantied, and it was the amp. A resistor had burnt off the board and was causing the amp to go into protect mode under load.

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                    • wesholeW Offline
                      wesholeW Offline
                      weshole
                      wrote on last edited by
                      #11

                      More often than not, it is the subwoofer that is blown. Hence the advice given to verify wether or not it was one or the other. While i have seen the same thing happen to other amps that you described, its not a common occurance and would be a diagnosis further down the road from the initial diagnosing. Good option nonetheless. Great to see others input.

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                      • civic91C Offline
                        civic91C Offline
                        civic91
                        wrote on last edited by
                        #12

                        new problem with the amp/sub. so i got a new sub but when i hooked it up nothing happened. only light on, on the amp is the power light. its a 4ohm svc sub and im wondering if i just wired it up wrong or if there is something i could be missing.

                        04 Toyota Celica Gts

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                        • T Offline
                          T Offline
                          Trafik Jamz
                          wrote on last edited by
                          #13

                          Double check all of your connections (RCA inputs on amp/outputs on deck; speaker wires on amp, inputs on sub, etc...) to make sure signal is making its way from the deck to the amp. If any connections loose/unhooked, reconnect them.

                          While your old sub was out is it possible that the speaker wires shorted together? This can cause the amp to blow it's output channels which would mean the amp is dead/needs repair.

                          Also, you said that you got a new sub.... does this mean brand new sub purchased from a local retailer or does it mean "new to you" where you bought it on craigslist/ebay/some shady online store. If it wasn't bought brand new in box from a local store I'd say there is a 30% chance that you bought a defective sub that the previous owner knew was dead when he sold it.

                          What is the make/model of the amp and sub? I ask because it's possible (not necessarily likely) that if it is a low end amp that initially it had a surge/spike that took out the amp AND fried your old subs voicecoil simultaneously.

                          If you want me to spend 10 minutes looking it over for you I can do that as well for no charge.

                          701.541.3484

                          Auto Starts from $200 Installed! Lifetime warranty.

                          701.541.3484

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                          • civic91C Offline
                            civic91C Offline
                            civic91
                            wrote on last edited by
                            #14

                            im checking all my connections right now. then im going to try and check if there is any power going from the amp to the sub. I have a feeling that there is something wrong with the amp but hopefully its just a connection.

                            The amp is a Rockford Fosgate p300-1 and the sub is a Kenwood KFC-W12. did not buy the sub in town, got it online bnib. also checked the sub after i hooked it up to the amp and got nothing and it seems to be fine but i would need to hook it up to a working amp to fully know.

                            Also while i was checking the ground wire, there was some speaker wire grounded with it. any idea what that would have been for?

                            04 Toyota Celica Gts

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                            • civic91C Offline
                              civic91C Offline
                              civic91
                              wrote on last edited by
                              #15

                              all connections seem to be good. so i tried adjusting some of the settings on the amp and now the protection light is flashing on and off again.

                              04 Toyota Celica Gts

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                              • T Offline
                                T Offline
                                Trafik Jamz
                                wrote on last edited by
                                #16

                                I'd really have to see it to know for sure at this point. As for the speaker wire grounded to the ground wire.....I'd have to see before I knew if that was a problem or not as well.

                                Auto Starts from $200 Installed! Lifetime warranty.

                                701.541.3484

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