bigger box less power!?

[chitowns finest 10+ year member]

hey i have a stroker 15 in a six cube box although the manufactur suggests 3 cube for it. now i only have a kicker 1200.1 on it even though my sub is rated for 2000 watts rms.so i am employing the bigger box lower power rule by making my box twice an big now my sub is smoked. its no big deal cuz a new cone for it is only 40 bucks since they are field replacable. to avoid blowing it up again can some one explain the sience of bigger box less power to me??for those who dont understand this concept it is used in competions to get the same spl from a sub in a bigger box with less power as if it was in a regular box with max power.

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[chitowns finest 10+ year member]

okay so that means what?

 

[PhatTonyDeMarco 5,000+ posts]

okay so that means what?

Meanins it will be able to handle less than 1000w RMS in that enclosure. So back off on your gains a bit.

 

[chitowns finest 10+ year member]

well i have only 1200 watts on it so it should be good right? all though when i smoked it i was using my 3000 watt mean machine.....

 

[PhatTonyDeMarco 5,000+ posts]

According to JMAC, doubling the reccomended box size will drop the power handling by MORE THAN HALF. So... half would be 1000w, less than 1000w is what you should aim for. Why are you using that box anyway?

 

[chitowns finest 10+ year member]

i bult the box cuz i only have a 1200 watt kicker that goest to 1 ohm my mean machine is 3000 at 2 and my stroker is a dual 2

 

[PhatTonyDeMarco 5,000+ posts]

So why not build a correct box, use the MM at 4 ohms, and be happy?

 

[chitowns finest 10+ year member]

i dont like small boxes + cewin vegas specs put the tuning freq at 32 hz what music plays at 32 hz??!! also with the bigger box theory i can get 2000 watts spl from my 1200 watt amp! no good??

 

[JimJ 5,000+ posts]

also with the bigger box theory i can get 2000 watts spl from my 1200 watt amp! no good??

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A larger box will reduce overall SPL.

to avoid blowing it up again can some one explain the sience of bigger box less power to me??

Hoffman's Iron Law, like Jmac said earlier. Larger boxes are simply more efficient and will send a driver to its mechanical limits sooner.

 

[RandyJ 10+ year member]

As said, bigger boxes are more efficient, so it takes less power to reach the mechanical limits of the driver. In this case, the mechanical limits were probably less than 1000wrms.

 

[chitowns finest 10+ year member]

thank you for the info guys cheak out my other post is "car audio in danger"!!

 

[SPL140.2 5,000+ posts]

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A larger box will reduce overall SPL

Ill half to disagree on that one

 

[audioholic 5,000+ posts]

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A larger box will reduce overall SPL.

To be more specific, that's frequency dependant. Yes output will be down across most of the useable range, but output in the lowest octaves will actually increase.

 

[audioholic 5,000+ posts]

Ill half to disagree on that one

Why?

 

[SPL140.2 5,000+ posts]

My personal experiences, plus look at the DB numbers section in competition section... Almost 90% of those with high scores have huge boxes for the subs they are using. I personally like to go 1-1.5 cubes more than what the manufacture recommends, im not saying use a 9 cubes for a 10" woofer though