Question about Volfenhag ZX-4712 Car Subwoofer

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Subs stopped working & protect light on the amp is red...

Ok first questions were is the serial number located on these subs? Ok well I bought 2 VOLFENHAG 2000 W SUBS and VOLFENHAG ZX 7180 2 CHANNEL 1600 WATT AMPLIFIER Item URL:http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=130094810110&sspagename=ADME:B:AAQ:US:1 My brother in law and I installed them just fine. Then a few days later one of the subs stopped working and the protect light on the amp started turing red. We took a closer look and noticed that the sub just kept making a hissing noise, and you could smell something burning in the sub, my brother in law said it may be the voice coil. So we took that one out and just had the one left hooked up. Except the next day that sub stopped working and the protect light on the amp is turning red again. I havent had time to check this one out yet, im been busy with college. We plan on trouble shooting and see what we can find out. My brother in law has the same subs as me but with a different amp. What i need to find out is if its the amp or the subs. Any help or suggestions are GREATLY appreciated. I would like to figure out the problem so i can send what i need to back and get new ones as soon as possible Thanks Corey Johnson

Posted by Corey Johnson on

  • Corey Johnson May 18, 2007

    Thank you very very much!

  • Anonymous Feb 13, 2008

    Im basically having the same problem. Initially my power light wouldnt come on, only the protect would, so i took my system to best buy. Upon arrival the green light was on and they thought i was just an idiot. they explained to me how if a positive and negative speaker wire touch the amp switches into protect mode, but when the technician touched the two wires together it did NOT switch into protect mode, this made the technician uncomfortable. He finished with my system and it worked great for about 2 days and then i noticed my lights dimming drastically one evening and popped my trunk and noticed both the protect light and the power light were on. I have done everything 2 or 3 times and nothing will get the protect light off. I brought my amp to best buy for them to test and they determined that it was no good. Now i cant find how to get it fixed or replaced. So far its been a waste of my hard earned money!

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Well at this point i would say it is both,, the subs fried because your amplifier passed dc [direct current] and fried the voice coils on your subs....return them if they are under warranty,, the amplifier sound like you either operated it beyound its specifications or it has a defective output stage allowing it to pass or leak dc....it turned the voice coils into the equivelent of the runners in a toaster oven....when an amp passes dc it is going to do so to whatever speakers you hook to it....so either bring it to a shop to be fixed/ return it to place purchase for exchange or throw it away.....or you will continue to experience the same problems....I am sorry..ps the amp goes into protection when it detects a short...[ the short is produced by the amp and it is detecting its own fault and putting it in to protection after it BURNS up your drivers....

Posted on May 18, 2007

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