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Blown Subwoofers


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warpedimage3 
Copper - Posts: 90
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Posted: October 06, 2005 at 10:00 AM / IP Logged  
When are subwoofers considered blow, because one of my friends has a 12" Alpine 4 ohm sub, and when tested it reads 4.6 ohms.  Is this sub blown or does it still have some life left in it?
DYohn 
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Posted: October 06, 2005 at 10:18 AM / IP Logged  

warpedimage3 wrote:
When are subwoofers considered blow, because one of my friends has a 12" Alpine 4 ohm sub, and when tested it reads 4.6 ohms.  Is this sub blown or does it still have some life left in it?

That sounds normal to me.  A sub woofer is "blown" when it quits working, or if it starts making strange rubbing sounds while it's working.  Or, while not technically "blown" per se, when you jab a screwdriver through the cone eight or nine times.  The last works best with Audiobahn or Sony sub woofers.

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alpine_king 
Copper - Posts: 73
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Posted: October 06, 2005 at 1:31 PM / IP Logged  
yah thats seems normal, wheny ou blow a sub you'll know it. and its hard as hell to blow those alpines so you should be fine.
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blazeronspokes 
Copper - Posts: 102
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Posted: October 06, 2005 at 3:38 PM / IP Logged  
if reading it with a meter, it will read 0 ohms if blown.
DYohn 
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Posted: October 06, 2005 at 3:43 PM / IP Logged  

blazeronspokes wrote:
if reading it with a meter, it will read 0 ohms if blown.

Not always.  Could be open which will read "OL" or infinite, could read normal resistance but the VC could be broken and rubbing mechanically.

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arrow12 
Silver - Posts: 527
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Joined: October 06, 2005
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Posted: October 06, 2005 at 11:05 PM / IP Logged  
if the woofer is blown you'll hear a more of a humming sound.  it definitely shouldn't be playing the deep notes too well either.  there will be a lot of distortion and weird noises to go along with it.
That's my opinion. Take it, leave it, or correct me.
chode69 
Member - Posts: 19
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Joined: October 07, 2005
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Posted: October 07, 2005 at 2:50 PM / IP Logged  
a blown sub will not read an ohm load... hooking a blown sub up to a meter will not show any resistance.
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