Blown 9515 what happened?

[Scotty2Naughty 10+ year member]

I have a 9515 running off a kicker kx2500.1 yesterday I was playing it pretty loud and the bass just stopped. Today I took it out and the cone is frozen in the down position but I tested the coils and they read fine. What caused it to blow, overexcursion? It never seemed to move very much but I don't know what else it could be.

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[wilzyx 5,000+ posts]

9515's dont blow, you must be mistaken

 

[dleccord 5,000+ posts]

why would you say overexcursion? did you set the subsonic filter?

 

[wilzyx 5,000+ posts]

how the hell did you blow it with only ~1800 watts of power at most?

 

[Scotty2Naughty 10+ year member]

I have no Idea how I blew it but I have it sitting on the kitchen table right here with the cone stuck all the way down. The subsonic was on and is set at 25hz.

 

[Death By Bass 10+ year member]

glue on the coil must have just burnt/melted... resulting in the coil coming undone off the coil former..., but still being connected...

 

[Nero557 10+ year member]

You blew a 9515 with that amp... Wow, i'm in total disbelief... bravo my good sir, bravo.

 

[Ctminime 10+ year member]

clipping?

 

[MassOccur 10+ year member]

Check out the gain setting tutorials my friend.

 

[Scotty2Naughty 10+ year member]

The gains were set via the gain tutorial and turned up just a bit. I playing Get Low for about a minute or two before the sub cut out. I had been messing with my amp wiring earlier because my comp amp was acting funny, maybe one of the coils wiring came loose and I was sending all the power from the amp at 1 ohm to just one of the coils. Everything sounded fine before it blew and I didn't smell any weird smell or anything though.

 

[newusername 10+ year member]

Even clipping, that driver should not have died with that amp. Clipping alone doesn't damage a driver.

Neil

 

[BassAddictJ 5,000+ posts]

weird.......somehow that cone got stuck.........

 

[snoopdan 5,000+ posts]

Even clipping, that driver should not have died with that amp. Clipping alone doesn't damage a driver.
Neil

While this is true, prolonged clipping over a abnormal amount of time could possibly induce enough thermal load on the coils to promote structruial damage to the windings. Remember a clipped AC signal at its extremes can induce a DC signal, But this is of couse an exgagerated event and still probably one of a seires of events that led to the demise of this sub.

 

[newusername 10+ year member]

While this is true, prolonged clipping over a abnormal amount of time could possibly induce enough thermal load on the coils to promote structruial damage to the windings. Remember a clipped AC signal at its extremes can induce a DC signal, But this is of couse an exgagerated event and still probably one of a seires of events that led to the demise of this sub.

Well, not to disagree, but there is never really any DC signal present. And the voice coil itself does not know the difference between a clipped signal or sine wave; it only sees the average power over time. If the average power over time is the same, the same "structural damage" is done.

Neil

 

[lilmaniac2 5,000+ posts]

dont guess u understand what a clipped wave looks like do ya //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif