XXX Box

[mythyone 10+ year member]

Looking for some input on a new box for my 05 XXX. Its in a 6^3ft @ 37hz box right now but its lacking some of the lows. Was wondering what size box and tuning i should go with for the new box. I searched but couldn't find anything helpful on the 18". Its gonna be ran on a pair of Aq1200d's for a power ref.

Thanks

Click to read more...

 

[Snow90 10+ year member]

Got mine in a 4 Cubic Foot box Tuned to 33. Love it.

 

[JimJ 5,000+ posts]

How "low" are you talking about?

I thought it was great sealed...

 

[KHARPS 10+ year member]

Bigger box with a lower tuning should solve that

 

[mythyone 10+ year member]

I was thinking around 34 hz would be better for daily. Just didnt know how big i need/should make it. Tried to find some info on them but haven't been able to find box sizes that they recommended.

 

[DNick454 10+ year member]

Assuming the box is actually tuned to 37 Hz, which is a bit high for a setup like that (daily atleast, the box may have been tuned to 37Hz simply as a stand-alone box. The RE XXX 18" takes up a whopping 0.3 cubic feet of sub displacement, and that's enough to knock the tuning up another 1-1.5Hz making it even higher than intended. Especially since the XXX 18" has an Fs of 15Hz //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif you need a bigger box and lower tuning. Try 8 cubic feet (after all displacements are accounted for) tuned to 32 Hz.

 

[DNick454 10+ year member]

I was thinking around 34 hz would be better for daily. Just didnt know how big i need/should make it. Tried to find some info on them but haven't been able to find box sizes that they recommended.

Did you not even check the RE website?//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif 6 cubic feet is the MINIMUM recommended enclosure volume for ported. Optimal is 9 cu. ft and that's optimal, not max, you could even go a tad larger, but I'd shoot for 8-9 if you've got the room. With some extra internal volume and a lower tune, that sub should ****ing destroy your car.

 

[mythyone 10+ year member]

Assuming the box is actually tuned to 37 Hz, which is a bit high for a setup like that (daily atleast, the box may have been tuned to 37Hz simply as a stand-alone box. The RE XXX 18" takes up a whopping 0.3 cubic feet of sub displacement, and that's enough to knock the tuning up another 1-1.5Hz making it even higher than intended. Especially since the XXX 18" has an Fs of 15Hz //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif you need a bigger box and lower tuning. Try 8 cubic feet (after all displacements are accounted for) tuned to 32 Hz.

Thanks for the info. As far as i know its tuned to 37hz, thats what i was told when i got it It hits the higher end lows very nice but i want some nasty lows in my truck. I really wanna be able to do a hair trick but i don't know if the 1 18" will move enough air to do that...may need have to get a 2nd and do a wall. he he

 

[mythyone 10+ year member]

Did you not even check the RE website?//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif 6 cubic feet is the MINIMUM recommended enclosure volume for ported. Optimal is 9 cu. ft and that's optimal, not max, you could even go a tad larger, but I'd shoot for 8-9 if you've got the room. With some extra internal volume and a lower tune, that sub should ****ing destroy your car.

Thats for the new XXX, I got the 05. Didn't think they had the same box recommendations.

 

[DNick454 10+ year member]

Hmm, well... 18" of cone diameter is 18". Even if the Fs and some other T/S parameters are different, I would assume that thing needs some more volume. Let me go do a quick search on the T/S and see if I can't come up with anything for the '05 model.

 

[DNick454 10+ year member]

Managed to find T/S parameters for '05 model.

FS 29hz

Re 1.9 DVC

Qms 5.09

Qes .64

Qts .59

Sd cm2 1210

Vas 244.2

Xmax 32mm/one way

BL 17.1

1W/1M 91.8

RMS 1600

Max 2500

It's a bit lower of Fs and less Xmax, but it will still get low. No info on recommended volume, and it does have a significantly lower Vas, so it would use less volume, 6 cubes still seems small to me though.

 

[mythyone 10+ year member]

Hmm, well... 18" of cone diameter is 18". Even if the Fs and some other T/S parameters are different, I would assume that thing needs some more volume. Let me go do a quick search on the T/S and see if I can't come up with anything for the '05 model.

http://img190.imageshack.us/my.php?image=rexxx.png

There's the specs. I know the 6^3ft box is on the small side, i just didn't know how big i should go for it. Thanks for the fast reply's and helping out.

 

[mythyone 10+ year member]

6 cubes still seems small to me though.

That's how i feel, i thought 18's took some pretty large box's.

 

[DNick454 10+ year member]

http://img190.imageshack.us/my.php?image=rexxx.png
There's the specs. I know the 6^3ft box is on the small side, i just didn't know how big i should go for it. Thanks for the fast reply's and helping out.

No problem, let me know if you need any help designing a new box.

 

[mythyone 10+ year member]

No problem, let me know if you need any help designing a new box.

Will do, how much you charge for designs? Im not the greatest at doing that yet.