Clamshell? Bandpass? Wanna do 150 burps.

[BrianChia 10+ year member]

Just put it in a big ported box. It should get louder than that sealed clamshell design.

 

[SeanDub 10+ year member]

Just put it in a big ported box. It should get louder than that sealed clamshell design.

The 10 10s? Or the 9515?

If you meant the 10s, I don't have room for 10 10s ported.

If you meant the 9515, everyone else says put it in a smaller box with aero ports. But the aeros are too long to get a decent tuning frequency and fit in my car.

Also, why wouldn't that sealed clamshell get loud?

 

[SeanDub 10+ year member]

Well then what about this?

9.55 cubes net. Subs up, port back.

4 6" Aero Ports, tuned to 38 hz.



6 12" Audiobahn AW1251t subs, total cost - $216.82 shipped ($36.14 per woofer)

Wires to 1.335 nominal, should rise to around 3, which would be around 2kw from my Stetsom.

That means they would each see around 333 rms, and their rated rms is 400.

These have the same cone area as around 8.5 10s, and each woofer will see more power.

So it should be of comparable loudness to the 10 10" clamshell design.

But it should definitely be louder than my 9515.

 

[PSturmer 10+ year member]

^^^^ a design like that will get decently loud.

 

[SeanDub 10+ year member]

So this is all the input I can get out of "the internet's leading car audio resource?"

//content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

 

[PSturmer 10+ year member]

the best resource is simply trying new things out yourself. to start, a wall is not needed to do 150. 2 12's and will can fairly easily do 150 on a burp

 

[SeanDub 10+ year member]

the best resource is simply trying new things out yourself. to start, a wall is not needed to do 150. 2 12's and will can fairly easily do 150 on a burp

I don't want to do a wall. Also, I know 2 12s can do 150 burps easily. But I want to keep the amp I have. I clamped my Stetsom at 2500 rms at 2.4 ohm. So I have a good bit of power, but that 2.4 is risen up from 0.5 nominal. Therefore, when I start dividing up the power between woofers, it gets less and less. There aren't too many pairs of 12" subs that can get up into the 150s with 1200 - 1500 rms a piece in an SUV. But they are available. However, they are not cheap. The best option would be the HDC3, but even they are over $400 shipped, and I don't think there are any more in stock.

Therefore, my idea here is to just get louder by adding cone area. And I'm also well aware that the best resource is to simply try new things. However, new things cost money. That's why I'd like to get this right on this try.

I like the idea of the 6 12s ported better than the 10 10s in a clamshell. But I don't know how it will actually work out, so I'm just asking for input.

And I do appreciate your input.

 

[jeremiah 10+ year member]

dud 4 mj's in a bandpass would do a 150 and sound good doing it to

 

[SeanDub 10+ year member]

dud 4 mj's in a bandpass would do a 150 and sound good doing it to

Dud, 4 MJs in a bandpass would take more space and money than I want to give up on this project.

 

[hunterw 10+ year member]

I think if you don't wall a clamshell or a big box you will have a ton of cancellation problems right there. =(. also how much time and money do byou plan on spending on the box. you gain 1-2 dbs by making your box stiffer and smoother. (resin,wax,threaded rod) which adds up. though its not needed to do 150s it helps lol. I think the 6 12s idea seemed good. (i don't know anything about sealed clamshells) also lots of internal angles help a lot as well, rounding corners, and also internal pieces about 8in deep to split the subs up to help with cancellation.most of the time suvs like subs up and ports back. subs and ports back work well as well, but I don't thi.k that will work in your plans. putting the subs as close to the side the port is on helps a little bit as well. though im not 100% surr how much lol.do you kno the res. freq of your rodeo?

 

[Chevyaudio 5,000+ posts]

Keep what you have and make it louder...those woofers are worthless. Installed MANY of them in various cars at the shop I used to work at. With what you have you should be able to accomplish that goal...and only spend 20 bucks on a sheet of MDF.

 

[SeanDub 10+ year member]

Keep what you have and make it louder...those woofers are worthless. Installed MANY of them in various cars at the shop I used to work at. With what you have you should be able to accomplish that goal...and only spend 20 bucks on a sheet of MDF.

That was the original plan before this idea. However, it is proving more difficult than I thought it would be. To get louder, I figured I would use external aero ports and a smaller box. However, I don't just want a fart box, I want something that will play music for daily driving as well. So I decided to go with around 3.75 cubes net, and use a pair of 6" aero ports. But in order to tune to 38 hz, each port has to be 24" long! My longest max dimension in the back of the Rodeo is 40 inches. 40" - 24" = 16". On top of that, the port opening is supposed to be approximately as far away from a surface as it is wide. 16 - 6 = not enough surface area left for me to mount a 15" sub. //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

So I'm still playing around with more volume and higher tuning, because that would allow me to fit everything back there. However, the people who have used these 9515s say that an SPL box is around 3.5 net. So it just doesn't seem like it's going to work out.

 

[Brassler07 10+ year member]

I don't disagree. But I just can't seem to get this Rodeo loud. I currently have it in 4.25 cubes tuned to 39 hz with around 100 sq in of port. Sub facing rear, port facing rear. I plan to keep this set up for the regular year.
However, I also contemplated a different box. 3.75 cubes net tuned to 38 hertz with 64 sq in of port, sub up, port back. But I don't know if it would any louder.

You should do a box with interchangeable ports one tuned high to the frequency of you cabin for SPL and one for daily.

 

[iamamp3pimp 5,000+ posts]

You should do a box with interchangeable ports one tuned high to the frequency of you cabin for SPL and one for daily.

those ****.

imo

 

[MikeyB 5,000+ posts]

Dont use the audioblings. Make a wall with like 15-20 Roadmaster 8's.