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myvanpounds
06-15-2006, 07:05 AM
sup guys. I origonally bought my 18xxx for more of a sq sub but I can't get the spl bug out of my system. so I really want to hit my goal of 150 and I have 1800 rms to play with but the catch is its gotta sound good so no 50hz tunings. my starting point is 8.5 cu ft @ 27 w/ 130 sq in port. I'm also throwing around the TL idea but I think that might be too big. someone steer me in the right direction closer to 150 +/- cause I wasn't to happy with 140

mazdakid
06-15-2006, 04:36 PM
i say no way your hittin 150 with it tuned that low

PhatTonyDeMarco
06-15-2006, 04:38 PM
I dont see a 150.

Josh #44
06-15-2006, 04:40 PM
i say no way your hittin 150 with it tuned that low

x2


I dont think theres any possible way to hit 150 with 27hz. And you also need more watts on top of that.

myvanpounds
06-15-2006, 04:59 PM
well lets start playing with the box. say tune it to 32 Hz make the port/box bigger? cmon people. I wanna get closer to 150 than 140. I'd be happy to hit a 148. hell if my two sx10's could hit 143 with 1800watts in a 3 cu ft box @ 30hz with little ports the 18 should be at least be able to beat that by 3-5 dbs

Speedyd718
06-15-2006, 05:02 PM
noah should chime in here if he hasn't it i'd ask em.

myvanpounds
06-15-2006, 05:57 PM
noah should chime in here if he hasn't it i'd ask em.

noah doesn't like helping me (we live in the same city and he want's to be the loudest) :P

ngsm13
06-15-2006, 06:10 PM
noah doesn't like helping me (we live in the same city and he want's to be the loudest) :P

Ha ha, bullshit... I'll help you whenever... ;)

So, I'd tune to 32-33 honestly... you'll still be able to hit the lows ;)

nG

ngsm13
06-15-2006, 06:15 PM
Can you fire upwards?

nG

myvanpounds
06-15-2006, 06:53 PM
Can you fire upwards?

nG

firing upwards was the plan. I can also wall If need be but I don't wanna wall for one 18 unless I HAVE to

80INCHES
06-15-2006, 07:01 PM
i say put it in a 6th order bandpass ...have the 18 in 4 cubes ported tuned to 27hz with a 90 square inch port
playing into a 4.5 cube ported area tuned to 70hz with 130square inch port

u should get nice and loud with that and still hit the lows very well

80
can some1 model that up so he can see how it looks on a graph

myvanpounds
06-15-2006, 07:08 PM
i say put it in a 6th order bandpass ...have the 18 in 4 cubes ported tuned to 27hz with a 90 square inch port
playing into a 4.5 cube ported area tuned to 70hz with 130square inch port

u should get nice and loud with that and still hit the lows very well

80
can some1 model that up so he can see how it looks on a graph

I'm modeling it in bb6p to compare.

80INCHES
06-15-2006, 07:19 PM
I'm modeling it in bb6p to compare.
hows does it compare?


80

myvanpounds
06-15-2006, 07:23 PM
hows does it compare?


80

box needs to be huge to get a controled freq response altho playing with it id does have a 5db peak around 70hz over a 5 cu ft 36 h ported box

myvanpounds
06-15-2006, 07:33 PM
I'm liking what I'm seeing with a 4th and 6th order badpass boxes. I've got to play around to get the best freq response AND more db's. I'm using 8.5 @ 27 w 130 as my bassis for SQ box and a 5.4 @ 36 with 170 inch as my bassis for SQL

80INCHES
06-15-2006, 07:34 PM
have u put the in car freq into affect

80

80INCHES
06-15-2006, 07:35 PM
I'm liking what I'm seeing with a 4th and 6th order badpass boxes. I've got to play around to get the best freq response AND more db's. I'm using 8.5 @ 27 w 130 as my bassis for SQ box and a 5.4 @ 36 with 170 inch as my bassis for SQL
for the 4th order bandpass make the ported area big if u want to have a more efficient box

80

ngsm13
06-15-2006, 07:41 PM
firing upwards was the plan. I can also wall If need be but I don't wanna wall for one 18 unless I HAVE to

Trucks like upfiring... walls in a truck cab aren't so good :(

I'd go with 7-8cubes NET @32hz with around 120 sq. in. of port

:)

nG

myvanpounds
06-15-2006, 08:01 PM
ok get this how bout a 8 cu ft @ 29hz with 130 inch, now have a removeable top thats maybe like 4-5 cu ft. tuned to 70. I'm playing with it now.

ngsm13
06-15-2006, 08:04 PM
ok get this how bout a 8 cu ft @ 29hz with 130 inch, now have a removeable top thats maybe like 4-5 cu ft. tuned to 70. I'm playing with it now.

WTF... 70?

XXX's don't like high note SPL...

Plus, you truck prolly peaks around 45-50...

nG

myvanpounds
06-15-2006, 08:08 PM
WTF... 70?

XXX's don't like high note SPL...

Plus, you truck prolly peaks around 45-50...

nG

my goal is a freq response thats pretty flat from 20-70. but with the abillity to turn off the eq and burp and tuned to 70 it'll peak about 3 dbs higher there. then if I start the low pass roll off around 60 I'll still get decent kick from the 70-80 peak hopefully giving me a flat response if I cross and eq it right

myvanpounds
06-16-2006, 12:23 AM
alright. I've been playing with boxes anywhere from 5.5-18 cu ft tuned anywhere from 27-36 hz I want it as loud as possible. but It has to hit that low note in soul survivor and say it to my face. noah, I got more room in my truck than you do. I'm not sure how much but I'm thinking 20 gross is possible maybe more (without the rear seats I was able to lay a 3x4 foot dry-erase board flat on the floor)

ngsm13
06-16-2006, 01:08 AM
alright. I've been playing with boxes anywhere from 5.5-18 cu ft tuned anywhere from 27-36 hz I want it as loud as possible. but It has to hit that low note in soul survivor and say it to my face. noah, I got more room in my truck than you do. I'm not sure how much but I'm thinking 20 gross is possible maybe more (without the rear seats I was able to lay a 3x4 foot dry-erase board flat on the floor)

Well duh.

I'm saying, trucks are low note vehicles... you truck will peak in the 45-55hz range... so if you want to have some SPL type box (removable port or whatever) tune to around 43-48hz... for the SPL type part of it.

With a XXX, because of XBL^2... you're not going to have great response to 70-80hz. There will be a VERY large roll-off @ around 60hz. I wouldn't xover the sub any higher than 63hz Lowpass...

I had mine tuned to 33hz... and the low note on soul survivor... was WICKED... it's sick. Even if you want to tune to like 30hz... but personally I'd tune to 31hz if I had the chance to do it all over again.

nG

bimma85
06-16-2006, 01:10 AM
Well duh.

I'm saying, trucks are low note vehicles... you truck will peak in the 45-55hz range... so if you want to have some SPL type box (removable port or whatever) tune to around 43-48hz... for the SPL type part of it.

With a XXX, because of XBL^2... you're not going to have great response to 70-80hz. There will be a VERY large roll-off @ around 60hz. I wouldn't xover the sub any higher than 63hz Lowpass...

I had mine tuned to 33hz... and the low note on soul survivor... was WICKED... it's sick. Even if you want to tune to like 30hz... but personally I'd tune to 31hz if I had the chance to do it all over again.

nG
all trucks? ....tacoma ext cab? :)

ngsm13
06-16-2006, 01:28 AM
all trucks? ....tacoma ext cab? :)

Pretty much, most truck will peak ~45-55hz...

Since I have about 120 sq. ft. of deadener in mine, on all panels including the roof... mine peaks @around 64hz...

nG

bimma85
06-16-2006, 01:29 AM
Pretty much, most truck will peak ~45-55hz...

Since I have about 120 sq. ft. of deadener in mine, on all panels including the roof... mine peaks @around 64hz...

nG
:word: so deadening my truck will raise where it peaks?
Sorry for the quick thread jack myvan...last ? :)

ngsm13
06-16-2006, 01:31 AM
:word: so deadening my truck will raise where it peaks?
Sorry for the quick thread jack myvan...last ? :)

So dictates my experience in 3trucks thus far... ;)

nG

myvanpounds
06-16-2006, 06:10 AM
**** you noah, you know I have 100+ sq ft of deadener wating here

ngsm13
06-16-2006, 08:35 AM
**** you noah, you know I have 100+ sq ft of deadener wating here

Still. Like I said, hardcore rolloff b/c of the XBL ;)

nG