What exactly is a blown sub? I have 3 dead subs now, and I'm wondering what can be done to help the problem. The problem with the subs is that you can wire them up, but they won't move, they act like they aren't powered. But otherwise, the subs appear to be in good working order, like there is no physical damage to them. So yeah, this first happened with a MTX, then an Eclipse aluminum cone, and now a JL. Is this the symptom of blown subs? Anyone know if they can be fixed? I'd prefer not to buy ANOTHER sub just to have the same thing happen again.

btw, the amp that did this to my babies is a PG ZX600ti, with a 2 farad cap.

 

This is just a guess, but it could be the voice coil melted. If you still have your original blown sub and are going to trash it anyway, try pushing the cone down to see if it moves freely. If it doesn't, you may be pushing too much power to the sub, or have the wrong enclosure for it. If it does move freely, I'd say try a different amp on those subs to see if they work or if they're really blown.

How many watts is that amp pushing to the sub and how many watts are the subs rated for?

 

Are you sure it's the subs and not the amp cutting out? Have you tried hooking up the subs to a different amp - that's the first thing I'd do.

Subs can blow all kinds of ways - melted voice coils, blown surrounds, or things like the lead wire just coming apart. If the cone still feels properly suspended, it's possible the sub is okay physically and has a bad internal connection somewhere.

Most subs come with some kind of warranty; as long as the sub doesn't look abused they may replace it for you.

If you really want to see a blown subwoofer, try plugging one into the wall...

 

[QUOTE]Originally posted by jzr
[B]Are you sure it's the subs and not the amp cutting out?

 

[QUOTE]Originally posted by Dum Dum Head
[B]
haha.

 

If you have an ohmmeter (you can pick up a cheapie at Radio Shack for like $10), check the resistance from terminal to terminal. You should see about 4 ohms (assuming a 4 ohm speaker)...if you see infinite resistance, the coil has an open, if you see near 0 ohms resistance, the coil has melted together into one big lump. If this has happened to three separate speakers, I would seriously start to suspect the amp...if you're within specs for power on the woofer, the amp may be screwed up and send in way too much juice.