I want the hardest hitting box I can make. What kind of box hits the loudest, ported or sealed. Also what can I do inside in the box as far as building walls in there to make it louder. I have two 12" rockford DVC's. Thanks

 

also I want it to look good in my trunk. If any of you guys have pics of your boxes in your trunks and know how many DB's you are producing that may help alot. Thanks again

 

Sealed. Completely sealed. Use silicone on every internal crack, including the terminal post.

Contact RF to find the best optimal enclosure size for SPL. I do not know myself, otherwise I would suggest a size.

Fill the inside of the box about 1/2 full with polyfill fiber. This makes the speaker think it's inside a larger box than it really is.

Use high-density 3/4 or 1-inch MDF and TAKE YOUR TIME!!!

Tony

 

For pure SPL you want ported or bandpass. Go to RF's site and see what they recommend for your specific sub. I am not quite sure what you mean by building walls inside the box. If you are talking about bracing go to JL audio's tutorial pages. Although many of the speaker makers now have box building tips on their site, so it may also be on the RF site.

 

loud=high ported,short stubby port
hard=low ported, long narrow port

 

There's a little more science that goes into calculating port lengths than that. I wrote a short program that will take care of that for you. If you do want to go ported, please let me know what type of numbers you are looking for and I can help you figure out the best route for porting.

 

You make a box out of the same materials and woofer, ported. I'll make the same box sealed. You might be able to crank out more dBs at a specific frequency (whatever the port is tuned at). Meaning, you find the right song that plays at the emphasized freqs, or close, and you're fine. But mine will sound better and be louder at all other frequencies. Don't forget to tell spuljack this piece of information. Also, I will get better extended frequencies and better (more) power handling.

Tony

 

If you're going after pure SPL/ear-ripping pressure and dB levels, I'd say a ported box tuned to low frequencies might be what you're looking for. This comes at the cost of sq, though. I doubt those DVCs are sq-oriented at all, but I dunno about 'em.


I'd talk to some rockford nuts or rockford directly and see what works best for those subs. I'm not familiar with a lot of their eq.

 

Let me say that a simple sealed box can be quite surprising. I have a simple sealed box with 2 10's and this thing rocks! Of course it helps that I have a little over 700W running the subs.

Here's a good equation for you guys.....

High power - sealed
Low power - ported

As others have stated, you do sacrifice SQ when you port a box, but of course it's all about what you want out of the system. Good luck!

 

"What kind of box hits the loudest, ported or sealed?"
Let's answer the question that was asked. Ported. Should I repeat that? Okay, it's still ported. Now for waht was not asked. A properly designed ported box will have less woofer excursion than an SQ aligned sealed box. Therefore greater power handling. So you still have higher power and higher SPL. If we go further we can look at modern ported box design that takes into account cabin gain. For a pure SPL freak the port will be tuned to the vehicles resonant frequency. And it will be an essentially one note box. But, as I said above modern ported boxes have a lot of software and thousands upon thousands of hours of testing to their benefit. There are a lot of really good sounding ported boxes.

That has nothing to do with the music I listen to. I am first and foremost a SQ guy. So in my own vehicle I have a sealed box. But this post isn't about what we prefer, or what we use in our own cars. It's about how to get the loudest box possible from a woofer that is designed for SPL.

 

Thanks for all the info. Me and my friend are going to make the box so I'll show him all the info in this post and well decide how we want to proceed. Also if anybody has any other suggestions I would loveto hear them. Thanks

 

I don't think any of us have argued the fact that a ported box is by far the loudest box that can be made. The big problem here is spuljack, the guy who started this thread, asked a pretty open ended question. To quote him.....

"I want the hardest hitting box I can make. What kind of box hits the loudest, ported or sealed. Also what can I do inside in the box as far as building walls in there to make it louder. I have two 12" rockford DVC's. Thanks"

While this may seem to be a quite complete question, there are some things missing.

Is he talking about the loudest daily driven box?

Perhaps he just wants a "one note wonder."

A lot of follow on question come up when you try to help him choose which box setup is right for him. So yes a ported box is by far the loudest box one can build, but is it right for all of us or for spuljack?? We don't really know.

 

When I started this thread I wanted the loudest box I could get and still be able to use daily. Not just a 1 hit wonder, but the loudest over all. I hope this helps.

 

Go to RF's site and see if the have a ported box recommendation. They might have at least two ported and two sealed box recommendations. And a note for power handling for each set up. If not, email their tech department.

 

Well, obviously everyone is going to have their own opinion on this. But...as a matter of lengthy experience with car audio, I would say go with a sealed box. Also note that most ported boxes need to be larger than a comparable sealed box. And, some woofers are better suited for one box over the other.

But, as an example only, I've noticed that more beginners and people that can't/don't appreciate the finer points of audio playback in the car tend to go with ported boxes. More experienced listeners tend to choose sealed boxes.

Bottom line? Either way, a properly constructed/installed/tweaked/positioned/amped box should give you great sound that you will probably be happy with.

Tony

 

i was just answering the question ....and he sounds like a youngin (as am i) and no i really dont care much for sq...my subs are full volumn 90% of the time ....and my ported box sounds fine as does the rest of my system

 

i got pics, click below. 142db

 

looks like your cap to me 14.3

 

Me too!

 

haha, my cap did read that number. I just went to a show and the car hit 142db.