How Did It Blow?

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jettagli03

Copper - Posts: 311

Joined: January 16, 2005

Location: United States

Posted: July 24, 2005 at 7:18 PM / IP Logged

I have an Orion H2 15 (2000rms 2500 peak) being run by a JBL GTO 1201.1 (1200rms) and its in a 2.5 cu ft box like manufacture says and it had over 200 hours played on it and was playing for maybe 20 minutes not even half power and when i got to my house it all of a sudden stopped and i went in my trunk and it was hard as a rock at first touch then i could hear the voice coil when i pushed it in and it was fried... HOW THE CRAP DID THAT HAPPEN? same thing happened to my Brahma with same amp... I mean its not like the amp has near enough power to blow either of these subwoofers, what possibly could have killed them? PLEASE REPLY I WANNA FIGURE OUT WHAT IM DOING WRONG!

furflier

Copper - Posts: 236

Joined: June 14, 2004

Location: United States

Posted: July 24, 2005 at 8:40 PM / IP Logged

Are your gains set properly? If your gains are not set right this will cause premature failure.

jettagli03

Copper - Posts: 311

Joined: January 16, 2005

Location: United States

Posted: July 24, 2005 at 11:57 PM / IP Logged

i had them set low because i didnt want them too high

jettagli03

Copper - Posts: 311

Joined: January 16, 2005

Location: United States

Posted: July 24, 2005 at 11:58 PM / IP Logged

how would that cause premature failure? -- im trying to learn as much as possible

dwarren

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Joined: December 03, 2004

Location: California, United States

Posted: July 25, 2005 at 12:12 AM / IP Logged

"I had them set low"...So how exactly did you set the gain? By guessing? What about a subsonic filter, you need one with ported boxes.

www.bcae1.com #63 to the right.

jettagli03

Copper - Posts: 311

Joined: January 16, 2005

Location: United States

Posted: July 25, 2005 at 12:15 AM / IP Logged

how are you supposed to set the gains. i've heard "matching it to the mids and crap" but how are you supposed to do taht with a 1200w rms amp? i would have to have it practically all the way down. i knew i needed a subsonic filter but the amp i already had didnt have one and i was waiting to get the money to upgrade. so how are you SUPPOSED to set the gains?

DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: July 25, 2005 at 1:13 AM / IP Logged

Read the link provided. Do a search on this forum, it's been posted hundreds of times. Or go pay for some help from a professional car stereo shop.

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JAydawg21

Copper - Posts: 51

Joined: July 01, 2005

Location: United States

Posted: July 25, 2005 at 12:34 PM / IP Logged

Well, Gain setting is important, I dont really know how the failure you described could be a product of improper gain settings. If I'm worng someone please set me straight. A sub sonic filter would hel prevent over excursion bucasue ported boxes lose cone control at ultra low frequencies but i dont think that would effect the voice coil. I wouild contact the manufacturer or the place you bought the sub and find out. Please post if you find ou though

'97 Jeep Cherokee sport

subs: JL 12w3v2 : RF 500a2 :

RF 1F capacitor

doors: 6" Diamond D361i -> RF 200a4

DYohn

Moderator - Posts: 10,741

Joined: April 22, 2003

Location: Arizona, United States

Posted: July 25, 2005 at 12:37 PM / IP Logged

JAydawg21 wrote:

Improper gain setting can result in a severely clipped signal, which can cause the voice coil to overheat. Same thing if the speaker experiences over-excursion (or "bottoming out.") The voice coil can easily overheat.

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Grkinstall

Member - Posts: 22

Joined: June 25, 2005

Location: United States

Posted: July 25, 2005 at 2:33 PM / IP Logged

you might need to check the amp that at certain peaks of power or random moments might be leaking voltage through the outputs which will turn that voice coil into an electric stove basically and and is heating up the voice coil way to much and is cooking it just enough to eat

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