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  • My Amp Blew My Sub!

    OK guys, you got any ideas?

    I've got a 200w amp and a 500w sub. I managed to blow this the other day and went to get a new speaker... plugged it in, it boomed nicely for about 10 seconds, and then killed that speaker (luckly the company let me take it back).

    I've taken the offending amp out and replaced it with one I was using in my old car, has anyone got any ideas on how I can test this, or should I just give it to an expert to sort out?

    Chewiee

    PS Got my Carnetix ordered last week, thanks Mike! Its about two weeks before my install gets completed...

    VW Mk2 Golf GTI 16V:
    Kenwood KDC-W6527 HU
    Silver Travla C134, Slot Loading DVD/CDRW,
    256MB, VIA Epia MII 12000, Carnetix 60W, Xenarc VGA/Composite TS and a GPS Mouse

  • #2
    Power up the amp and check if you haven't got any DC on your speaker output... the only thing I can think of when it sounded good...

    If you have dc on the output, it probably needs adjusting or some component broke.
    List of front-ends/usefull apps
    XTroniC | XTroniC Direct

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    • #3
      Originally posted by JC-S60
      If you have dc on the output, it probably needs adjusting or some component broke.
      Adjusting? How? inside? The gain? By a specialist?

      Thanks for the speedy reply!

      Chewiee

      VW Mk2 Golf GTI 16V:
      Kenwood KDC-W6527 HU
      Silver Travla C134, Slot Loading DVD/CDRW,
      256MB, VIA Epia MII 12000, Carnetix 60W, Xenarc VGA/Composite TS and a GPS Mouse

      Comment


      • #4
        [QUOTE=chewiee]OK guys, you got any ideas?

        I've got a 200w amp and a 500w sub. I managed to blow this the other day and went to get a new speaker... plugged it in, it boomed nicely for about 10 seconds, and then killed that speaker (luckly the company let me take it back).

        I've taken the offending amp out and replaced it with one I was using in my old car, has anyone got any ideas on how I can test this, or should I just give it to an expert to sort out?

        Chewiee
        [QUOTE]

        I dont mean to be nasty mate, but lie down before you hurt yourself. 200w amp and 500w Sub?!?!? you fool. The amp needs to be equal power or greater than the attached speaker. Else, you will get clipping and overdrive which will shred your speakers. Anyone who knows an ounce about audio will know this. Go read up on ohmage and wattage and what amps/subs to use, THEN try installing your car audio. Unless you have loads of money to waste that is..........
        http://www.digital-car.co.uk

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        • #5
          Well, first off, I would get a multimeter and measure the outputs, to check if my assumption is anywhere near the truth...

          Then the adjusting or repair should be done by a specialist, as you'll need a scope and some knowledge to do that... it certainly won't be the gain.
          List of front-ends/usefull apps
          XTroniC | XTroniC Direct

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          • #6
            If I had to venture a guess... I would have to say you either A) have DC on the output of the amp, or B) your amp is a 200W continuous, and your speakers are 500W peak. If the answer is A, there is most likely a faulty component in the amp. If the answer is B, you need to reduce the gain on the amp. A quality 200W continuous amp is capable of producing over 600W peak where as cheap 500W peak speakers are probably only 150W continuous.

            As for Dracos' comments, he's kinda correct, but mostly backwards. You can damage some speakers by not driving them hard enough, but that is usually only the case when trying to WAY underdrive the speakers. I won't comment on his nastiness and inability to properly use the quote funtion.

            Good luck Chewiee
            2006 Chevy Colorado: VIA M10000 EDEN, 1 GB RAM, 80 GB 2.5" Seagate HDD, USB Slim Slot DVD/RW, Holux GPS, MobileVU 10.4" LCD (touch not working yet), VOOMPC Case (blue), 70W DC-DC supply.

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            • #7
              Underpowering speakers WILL NOT damage them, it just means they wont get as loud. If the amp is CLIPPING however, then your dustcap will probably end up the other side of the carpark
              Leo

              http://www.talkaudio.co.uk

              A million people can't be wrong, right?

              Well... unless they're all from the red states...

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              • #8
                when you got the new speaker did you break it in? or just start really loud?
                1990 Jeep Cherokee
                2000 VW Golf TDI 4dr
                2005 VW GTI MKIV - SOLD

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                • #9
                  Agreed, under driving a speaker won't damage it at all. 99% of the time the main cause of blowing speakers is distortion. It doesn't matter what the max watts of the amp or subs are, it's so hard to compare ratings from one manufacturer to another, usually cheap amps are over rated and good quality (expensive) amps are under rated. Just don't overdrive the amp/sub to distort.

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                  • #10
                    I wish more amp manufacturers would put a bright coloured LED on the side of the amp that will light up if your amp is clipping... It would stop a lot of people blowing up speakers.

                    But then again, i guess that means less sales for them too right...

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                    • #11
                      Originally posted by IamMBS
                      It doesn't matter what the max watts of the amp or subs are, it's so hard to compare ratings from one manufacturer to another, usually cheap amps are over rated and good quality (expensive) amps are under rated. Just don't overdrive the amp/sub to distort.
                      Which is why anyone with any sense should look at the RMS values

                      If there not listed, that should tell you something.......
                      Leo

                      http://www.talkaudio.co.uk

                      A million people can't be wrong, right?

                      Well... unless they're all from the red states...

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                      • #12
                        Originally posted by LeoTheHamster
                        Underpowering speakers WILL NOT damage them, it just means they wont get as loud. If the amp is CLIPPING however, then your dustcap will probably end up the other side of the carpark
                        Not until you push the volume beyond its calling limits. Then you clip and boom.
                        Car: 2000 Audi A4 Avant 1.8t
                        Carputer 2.0: removed. Back to stock.

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                        • #13
                          Originally posted by brrman
                          Not until you push the volume beyond its calling limits. Then you clip and boom.
                          Congratulations, you just repeated what I said
                          Leo

                          http://www.talkaudio.co.uk

                          A million people can't be wrong, right?

                          Well... unless they're all from the red states...

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                          • #14
                            I think the problem is user (install) error, here's some reading material:
                            http://www.bcae1.com/amplfier.htm
                            WORKLOG

                            Asus P5N73-AN Mobo/Celeron E1400 2Ghz Dual Core CPU/2Gb GEIL PC3200/120GB HDD/DSATX PS/8" Phylon TS
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                            • #15
                              Originally posted by LeoTheHamster
                              Congratulations, you just repeated what I said
                              wow - aren;t you a friendly ***** today
                              Car: 2000 Audi A4 Avant 1.8t
                              Carputer 2.0: removed. Back to stock.

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