2 subs blown in a month

Initial thought......  just too much power for that caliber of sub......  not sure exactly what part number you have for you sub amp, but here are some specs for their 1200 what amp.

PS...  it is always a good idea to include exact part numbers and details about you ride so we can help you out.

SONY XPLOD XM-ZR1852 im guessing this is the amp.  Even thought it has numbers like 1000w....

Specs on the amp in real world state more in the range of 400 watts RMS.  Hopefully you know what RMS is.  This is a brideged mode power output.

Rockford Fosgate P1S412 12" Punch P1 4-Ohm SVC Subwoofer features 300 Watts Max Power

I was running a JL audio 10w3V2....  it had a RMS power rating of about 300 to 500 watts RMS.  I run an ALPINE MRP-M1000 that puts out aprox 600 watts RMS going to a 4 ohm load.  I just blew my JL about two weeks ago.

I then went and got an alpine type R 12" because of this reason.  My amp could put out more than what my sub could take.  The alpine type R can take up to 500 watts rms with peaks of 1500 w.  I now run my amp at a 2 ohm load which can throretically provide the full 1000 watts RMS to my sub.....  so I still have to be carefull.  But the type R has a much more robust voice coil than the JL 10w3 I was running.

Next key point to consider  or check is the gain setting on your amp......  I pretty much run mine at nominal, or half way on the dials......  that should be pretty safe and it is not pushing the amps to a crazy level of performance.  There are several ways to set gains just perfect and this forum has them write ups on that very lesson.

Enclosure for your sub.......  this matters.  I found out that my sub enclosure I built for my JL was just not correct.  This can allow a sub to basically flop around or have very little control when being pushed by heavy wattage.  I have since gone to the perfect sealed enclosure for my type R and I dont expect more issues when really giving it a work out.

https://www.the12volt.com/installbay/forum_posts.asp~TID~85479~PN~1

Hope this info helps......  if you want a great sub for the price, I would recommend the type R.  It will take what your amp can put out and then some.  Great performing subs for the price vs JL pricing.

Licto

yes same here i think the amp is clipping like crazy

i have a rockford 15 inch sub 600 w rms on a groundzero hydrogen 1480 w rms

and no probs even with long times at full power

the same sub before  the GZ was on a hifonics samson 300 w rms also no probs

so or your amp is broken and feeds dc to your subs or the amp is clipping like crazy

and caliber sorry to say but just looking angry at them and they blow up!

rockford well that is strange they can handle some abuse.

spl_kid wrote:

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The problem is this if you keep blowing the replaced sub. the new sub requires a break-in period and you can't just pound on it out the box like your doing. That would cause it to malfunction or blow. If it is not the new sub everytime.

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zerepdivad wrote:

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spl_kid wrote:

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The problem is this if you keep blowing the replaced sub. the new sub requires a break-in period and you can't just pound on it out the box like your doing. That would cause it to malfunction or blow. If it is not the new sub everytime.

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Not true. Subwoofers do not require a break-in period.

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Uh-Oh...Refer to the search feature...!

Speakers need to be broken in because it makes them sound better.  They do NOT need to be broken in to prevent damaging them.(Dyohn)

You folks may be misinterpreting what speaker break-in is all about.  It is not some magical thing that is necessary for the drivers to operate properly, it is simply a natural phenomenon that occurs in ALL loudspeakers whether you like it or not as they are used.  The soft parts become more compliant and the speaker operates better, moves more freely, sounds better, etc.  It is not a myth and it is not BS it is physics.  Period.(Dyohn)
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Here's the bottom line:  No speaker "requires" break-in to prevent some sort of damage.  All speakers potentially operate better and can sound better after they are "broken-in."  Period.  The proof is in the ears of the listener and the effect is different for every speaker.  Every speaker is different and reacts to operation differently.  The most common effect of break-in is a lowered fs.  Some manufacturers recommend a break-in period because their experience shows that their speakers sound better if it is done.  Others don't.  Simple(Dyohn)

I think there is an article from Adire audio regarding this also...See if i can find it...

The causes for speaker failure can be either thermal or mechanical.

The causes for thermal failure are : 

• too much input power
• signals outside the speaker bandpass (radio frequency, subsonic frequencies, deep bass). Energy not to converted to sound ends up as heat
• amplifier clip, the most common cause of thermal failure
• direct current (DC) at the amplifier output, although this is uncommon in today's amplifiers
• excessive equalization, mostly high frequencies, since these frequencies exhibit low transducer efficiency and generate lots of heat

To prevent thermal failure, avoid amplifier clip and ensure that the speaker is only receiving frequencies within its bandpass, using high-pass and low-pass filters to limit the frequency content being fed to the speaker.

The causes for mechanical failure are always linked to excessive diaphragm (cone) movement. The speaker shows greater excursion (backward and forward movement) the lower the frequency. Hence a signal low enough in frequency and large enough in level may cause the voice coil to exit the gap, resulting in the coil rubbing, and possible ending up shorting or opening. The worst case scenario happens when the coil former hits the bottom pole piece ("bottoms out") and gets deformed. To prevent mechanical failure, avoid using signals below a speaker's bandpass, and use an amplifier of the correct power output.

5. Selecting amplifier power

In general, the amplifier power needs to be larger than the speaker's rated power. This is because an amplifier only delivers its rated output power with sinewave signal, and delivers much less with a real signal with dynamics. As ageneral guideline, it is recommended to use an amplifier delivering 50% more power than the speaker's average ("RMS") power. For example, for a speaker with 450W average power, an amplifier with an output of 700W may be used. If a small amplifier is used, sufficient level will not be reached, nor the perception that it is attained, so the signal will tend to be clipped to compensate, thus endangering the integrity of the speaker... https://www.doctorproaudio.com/doctor/temas/powerhandling.htm

https://www.the12volt.com/installbay/forum_posts.asp~TID~74226~PN~1~TPN~3

https://www.bcae1.com/2ltlpwr.htm

zerepdivad wrote:

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Ok well back on topic. Original poster.... learn how to tune an amp or read up on it, or take it to somebody to do it for you. You'll just keep going through subs/money.

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Everything i posted was for "his" topic...And to kill the break-in mumbo-jumbo before it got started...The links i provided are the likely situations of what happened to his subs...That would be on-topic...Maybe a bit more informative then your answer...?

tommy... wrote:

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zerepdivad wrote:

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Ok well back on topic. Original poster.... learn how to tune an amp or read up on it, or take it to somebody to do it for you. You'll just keep going through subs/money.

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Everything i posted was for "his" topic...And to kill the break-in mumbo-jumbo before it got started...The links i provided are the likely situations of what happened to his subs...That would be on-topic...Maybe a bit more informative then your answer...?

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mrarff wrote:

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I might can offer another cause of "premature speaker ejaculation". It's a ding bat who doesn't bother to match his equipment (he buys what his buddies say is kool) , has a "ghetto install" performed (turning his gains all the way up) and then roars down to the Dairy Queen with his "system wide ass open and a smug look on his face.Then when it turns into a great big pumpkin,he wonders wth happened. I've seen my son do it twice, he's a slow learner.

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Now THAT's funny.  And accurate.