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mythyone
05-22-2009, 10:44 PM
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

Snow90
05-22-2009, 11:52 PM
Got mine in a 4 Cubic Foot box Tuned to 33. Love it.

JimJ
05-22-2009, 11:55 PM
How "low" are you talking about?

I thought it was great sealed...

KHARPS
05-22-2009, 11:56 PM
Bigger box with a lower tuning should solve that

mythyone
05-23-2009, 12:06 AM
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
05-23-2009, 12:07 AM
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 :laugh: you need a bigger box and lower tuning. Try 8 cubic feet (after all displacements are accounted for) tuned to 32 Hz.

DNick454
05-23-2009, 12:09 AM
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?:laugh: 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
05-23-2009, 12:13 AM
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 :laugh: 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 :P 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
05-23-2009, 12:14 AM
Did you not even check the RE website?:laugh: 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
05-23-2009, 12:17 AM
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
05-23-2009, 12:24 AM
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
05-23-2009, 12:26 AM
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
05-23-2009, 12:30 AM
6 cubes still seems small to me though.

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

DNick454
05-23-2009, 12:31 AM
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
05-23-2009, 12:33 AM
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.

DNick454
05-23-2009, 01:21 AM
It depends on size and complexity, I'm heading to bed, I'm really tired. I'll send you a PM tomorrow and we can discuss some options. I did a design for a guy though with an F-150, I think it was that body style and I think I've still got the dimensions written down somewhere. It was for four 12" CVR's. Oh well, anyways, I'll hit ya up tomorrow :D