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First I'll start with my setup:

A.) MTX 6500D 500-775watt @ 2ohm amplifier
B.) Single eclipse 88150 DVC 15" sub
C.) Custom 2.6cubic foot enclosure

I had this setup for 4 days, and I hit a bass note that I guess was too hard and the woofer fell through and stuck to the bottom. A friend of mine told me I fried the inner voice coil. I'm guessing there's no way to fix it, and if there was it probably would not be worth it.

This sub is supposed to handle 500-1000watts per the manufacturer's specs. Eclipse won't warranty it since I didn't buy it from an authorized dealer, what a load of crap..

Anyone that may know what happened, feel free to let me know...God, I'd hate to do it again...anyone know where to get an eclipse 88150dvc cheap?

 
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thats way too big of a box for that sub they want about 1-1.25 cubic ft. even for the 15

but that shouldnt have blow the sub that fast. did you properly set gains? was your loud on your hu on? bass on a high setting? how loud was the hu?

 
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I designed the box with WinISD pro and for a perfect (0.72 qtc), which is supposed to be the optimum design for SQ.

And eclipse recommends a variety of sizes, depending on what you want your bass to sound like, (0.65/1.25/2/ or 3 cubic feet). If you goto the following eclipse link:

http://www.eclipseb2b.com/FAQ/Speake...peakerFAQ1.htm

 
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My gain was about 3/5th's on the amp, because Im running speaker level inputs, and the bass-boost was about 1/2 way. The stock civic head-unit doesn't have loud [IMG]i/expressions/face-icon-small-sad.gif[/IMG].

The bass on the head-unit was set up to 6, but I still don't think that would blow it, the amp wasn't even warm.

 
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the sub is rated for 500 rms, 1000 peak, not 500-1000 your amp runs 500 rms @ 12 volts and 775 rms @ 14.4 volts... cars run at 14.4, ... according to others around here i know you can feed it 650 rms or so safely, but maybe 775 rms was too much...

 
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i ran my old 15 at 850 from a 1200d so wasnt that it was too much power.

 
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Cars never run at 14.4 dude.. [IMG]i/expressions/face-icon-small-smile.gif[/IMG] not under any load anyhow..generally 13.4-13.8 is where they sit..

The sub was in much too large an enclosure..the only way it would bottom out is with a really low bass note.. The sub has very little suspension of it's own to it lost linearity..bottomed out.. the VC touched the pole piece..and fried..

I'm currently running an SVC 4ohm 88151.4 and have it in 1.55 cubes..it sounds very awesome. Never go by WIN Isd numbers..they are a guideline..not real world figures... in 2.0 cu.ft the sub sounded very loose and sloppy...True SQ subs which will not suffer overhang with a .707 alignment generally have very stiff suspensions..poor low end extension and still require fairly large enclosures... Even the new W7's won't work well in enclosures giving it a ,707 alignment.. Power handling drops dramitically and the woofers suspension is too loose to you get a fair bit of overhang on bass notes.....

For future reference.. WINisd is not the real world [IMG]i/expressions/face-icon-small-smile.gif[/IMG]... Sorry to hear about your sub...I've blown expensive subs too.. always my own fault...learn from it [IMG]i/expressions/face-icon-small-smile.gif[/IMG] also the OEM HU was probably clipping the hell out of the signal..If your gonna run expensive quality gear..have expensie quality signals.. A system can only sound as good as it's weakest link..

 
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Is it bad that my digital readout on my cap is always hovering around 14.4 when I have my car running? I have two amps hooked to it with a distribution block.[IMG]i/expressions/face-icon-small-confused.gif[/IMG]

 
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That's probably what happened, it sounded like --(BOOM BASS HIT)--(Tink)--(nothing)..... What should the alignment be then for a sub like that then, 1.33?

 
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go buy that exact same sub at an authorized dealer... then bring them the blown one a few days later, and they'll have to respect the warranty or whatever... you'll end up with 2 subs... i ran this little scam w/ some components i bought on e-bay then blew.

 
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That wouldn't work....Eclipse is very **** about serial numbers matching up...they'd probably sue the guy for shipping costs..

As for the Eclipse sub..most car audio subs designed for sound quality..the companies generally reccomend enclosures for best SQ with a Q of about .8-.85 for optimized SQ..

 
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thats close to mine

a system can only sound as good as the component before it.

ie. if you start with crap you will end up with crap

 
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I always thought that .7x QTC was what your supposed to hit. How do you determine what a good Q alignment is for each and every woofer, without building the box first?

 
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well...lol..use the manufacturer reccomendations as a guideline...there is a way to determine this scientifically..but the parameters involved are too much for me to want to figure out right now..I'll leave those to speaker designers