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static electricity=dead sub?

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netboy 
Copper - Posts: 108
Copper spacespace
Joined: March 02, 2004
Location: United States
Posted: March 28, 2004 at 3:34 PM / IP Logged  
Ok weird thing happened to me....I started my car, turned on my stereo, sat around for a bit, opened up the tunk to get something, touched the carpet....then ZAP! i got a little ecectric shock (scared the bull sh*t out of me) my 15" sub jumped and now is dead.  WTF happened?  Fuses good amp 5-ch and all other 4 ch are still playing, but no sub.
Memphis MC-1300
2 12" JLw6v2
Diamond audio M3 6x9
Diamond audio M3 5.25 components
Audio control Matrix
Carputer
DYohn 
Moderator - Posts: 10,741
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Joined: April 22, 2003
Location: Arizona, United States
Posted: March 28, 2004 at 3:41 PM / IP Logged  
Sounds like more than static electricity, sounds like the sub amp was somehow electirally connected to the carpet and you shorted it to ground by touching it.  Interesting.  I suspect the amp is what blew, unless you have fuses on your sub.  Does the woofer cone move in and out OK if you press it gently by hand?
flatulatta 
Silver - Posts: 356
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Joined: August 28, 2003
Location: United States
Posted: March 28, 2004 at 4:07 PM / IP Logged  
woah... thats weird.... how would it be connected to the carpet??? i didnt think carpet conducted electricity
netboy 
Copper - Posts: 108
Copper spacespace
Joined: March 02, 2004
Location: United States
Posted: March 28, 2004 at 4:07 PM / IP Logged  
No fuses on my sub....I will take off the grill and try that, if it does or doesnt, what does that mean?  Grrrrr.....my freakin stereo falling apart.
Memphis MC-1300
2 12" JLw6v2
Diamond audio M3 6x9
Diamond audio M3 5.25 components
Audio control Matrix
Carputer
DYohn 
Moderator - Posts: 10,741
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Joined: April 22, 2003
Location: Arizona, United States
Posted: March 28, 2004 at 4:21 PM / IP Logged  

If the woofer moves OK, then I would suspect the amp is the problem.  If the woofer binds or won't move at all, the voice coil is fried.

Carpets tend to be made from nylon or polyester (plastic) and do indeed conduct electricity.  Not very well, but they do.

xtreamcc 
Silver - Posts: 467
Silver spacespace
Joined: March 24, 2004
Location: United States
Posted: March 28, 2004 at 4:33 PM / IP Logged  
if your ground is connected to the carpet in any way (bare metal, attached, or covered by it) it can conduct and if it shot through the ground it would only affect the sub channel because..... good question.... I dont see how it would just fry one channel.... weird.
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DYohn 
Moderator - Posts: 10,741
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: April 22, 2003
Location: Arizona, United States
Posted: March 28, 2004 at 4:43 PM / IP Logged  
Could be a loose wire or a stray strand of wire or cut insulation.
superstreet786 
Silver - Posts: 339
Silver spacespace
Joined: August 12, 2003
Location: United States
Posted: March 28, 2004 at 7:13 PM / IP Logged  
theres no way that much electricity could flow through carpet unless there was some sort of metal there
---- 1996 Chevy S10 ----
1 Lightning Audio S2.600.2 Amp
2 Lightning Audio 12" Subs
1 Lightning Audio 1 Farad Cap
netboy 
Copper - Posts: 108
Copper spacespace
Joined: March 02, 2004
Location: United States
Posted: March 28, 2004 at 8:33 PM / IP Logged  
Ok i pulled the sub out, it is free moving, not seized up at all, no loose or disconnected wires.  solid ground and all wires hooked up secure from what i can tell.  Sub still not working :(
Memphis MC-1300
2 12" JLw6v2
Diamond audio M3 6x9
Diamond audio M3 5.25 components
Audio control Matrix
Carputer

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