Blown subs

[joshpoints 10+ year member]

I have blown three sets of subs in under two years. The first set the surrounds separated from the cone, looked like the glue gave out. The second time The wire that runs from the speaker terminal to the woofer burnt into two pieces and the surround came unglued. The third set the wire from the speaker terminal to the speaker cone gave out again. Is this manufacturing problems or is it my set-up? I have a kenwood 600 watt peak amp running bridged with the wires running + to - and - to +. The subs are jbl speakers and are rated at 250 watts rms each and peak at 1000 watts. THe first and second set, when I turned the speakers up loud the bass would cut out prior to the speaker damage. Help is greatly appreciated. THe sound of the subs is geat. I don't notice any distortion, except on low quality downloaded songs. I tried a lightning audio amp with the same ratings and the speakers didn't sound as good and had a tendency to distort. I tried a cheap amp rated at 1,000 watts and it sounded worse than the lightning audio amp.

What's the verdict?

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[joshpoints 10+ year member]

Come on guys a little help.

 

[abcdefg 10+ year member]

i dont see how could have ripped the cone off of them with only that amp going to them

 

[joshpoints 10+ year member]

The cone didn't actually tear, it just separated from the rubber surround at the glue area. But some how it was enough power to melt the wires that run from the speaker terminal to the cone.

 

[joshpoints 10+ year member]

Is this an unsolved mystery? Woes anyone have any ideas as to how or what caused this to happen?

 

[Matador 10+ year member]

i'll say manufacture's problem. in ur first setup, i'll say definitely. 2nd prob wire, n 3rd was just chance. =)

i mean i don't think it could be anything else besides that. unless someone might

 

[audiolife 5,000+ posts]

not to sound mean or anything but sounds like you have a touch of volume master in your blood

 

[i3abyjay25 10+ year member]

i think it just JBL.. my friend had 2 10s, and they burned out on him as well.. off a mtx blue thunder 75x4..

 

[audiolife 5,000+ posts]

burned wire, melted reheated glue are signs of clippage

 

[joshpoints 10+ year member]

Originally posted by audiolife burned wire, melted reheated glue are signs of clippage

How do I prevent clippage? Is it that Kenwood amps aren't any good. I'm using a fosgate capacitor and 8 gauge power wire. Does clippage come from the amp or does it come from my deck? Let me know as I don't want to keep wasting money on blown subs. I do play my music loud, but I don't get any distortion. YOur help is greatly appreciated.

 

[audiolife 5,000+ posts]

Originally posted by joshpoints How do I prevent clippage? Is it that Kenwood amps aren't any good. I'm using a fosgate capacitor and 8 gauge power wire. Does clippage come from the amp or does it come from my deck? Let me know as I don't want to keep wasting money on blown subs. I do play my music loud, but I don't get any distortion. YOur help is greatly appreciated.

miss matched gain to deck output setting causes a clip (very bad) can generate up to 10 times rated power for nothing more than a puking sound...turn the gains down a tad on the amp

 

[joshpoints 10+ year member]

Originally posted by audiolife miss matched gain to deck output setting causes a clip (very bad) can generate up to 10 times rated power for nothing more than a puking sound...turn the gains down a tad on the amp

Thanks a lot man. You're the bomb! Now that you mention that I noticed a difference with the sound when I had it set-up with a different deck when my speakers were getting blown. I've my new deck for a little while now. It sounded really loud, but the bass had a different sound. With the new deck it sounds like a more accurate sound. Sorry but if I could ask you one more question. How do I know when the gain and deck output are matched? Is this dependent on the Preamp output voltage on the deck? I noticed my old deck didn't even have a rating, and my new deck has a 5 volt preamp output for the subs.

 

[audiolife 5,000+ posts]

you got it..you be on right track

 

[joshpoints 10+ year member]

Originally posted by audiolife you got it..you be on right track

You are the wise man. You shall now have the nickname the wiseman. Finally I have found out what is causing my speakers to blow. Do you think the 600 watt peak, kenwood amp is enough to power the two jbl subs they are rated at 250 rms, 1,000 peak? This will be the last question.

 

[94yodapickup 10+ year member]

Do you think the 600 watt peak, kenwood amp is enough to power the two jbl subs they are rated at 250 rms, 1,000 peak?

i no this question isnt for me but im gonna comment... i think an jbl 600.1 would do real good there only 180 bucks but if u dont got ne money yea that amp will do but kenwood amps arnt the best amps from the experience ive had with them.