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vetkilr
07-27-2006, 06:29 PM
Is there any rule that that one side needs to be smaller then the other???

Most Ive seen and heard have the side with the sub smaller(back chamber)then the front chamber.

Is there a rule to this?:crazy:

80INCHES
07-27-2006, 06:40 PM
http://www.diysubwoofers.org/bnd/6thord4.htm

thank me later


80

vetkilr
07-27-2006, 06:51 PM
http://i7.photobucket.com/albums/y293/vetkilr/designsforbandpassbox.jpg
1.1 back section per=2.2 combined ported
2.3 front section ported

Is there anything wrong with going larger on the Back sections.L7s seem to like larger ported and graphin the lowend really wakes up giving it more air that way.

Ie:
2.6 back
2.9 front

Mine:
3.3 back
2.9 front
About 2 db difference down low end under 60 hz down to 30hz

80INCHES
07-27-2006, 07:01 PM
personally
i would go with the kicker recommended 4th order bandpass
they told me they dont recommend the 6th order..i never got a reason they just said the L7's will perform better in 4th order
but if u want to try 6th order
the rear chambers are very small i would do 2 cubes ported per 12 playing into atleast 4 cubes common ported front chamber

80

vetkilr
07-27-2006, 07:14 PM
personally
i would go with the kicker recommended 4th order bandpass
they told me they dont recommend the 6th order..i never got a reason they just said the L7's will perform better in 4th order
but if u want to try 6th order
the rear chambers are very small i would do 2 cubes ported per 12 playing into atleast 4 cubes common ported front chamber

80
About what I had.

Dont know if I have that much room though.
Came up with:
1.6 per tuned to 36
into 3.6 tuned 80 with 80 square and looks ok.

I was really wonderin if there was some rule about the back chamber being really big and the front small,but guess not.
I know with 4th the front seems to be the booster,but with 6th it looks like the rear chamber has more to do with output then the front in most all cases,but to a point of course.

80INCHES
07-27-2006, 07:29 PM
this is y alot of people dont like bandpass boxes..it needs a big box
especially 6th order...with 6th order u need 3 big ported chambers
with 4th order its alittle more forgiving
i've designed 4th orders thats had .8cubes sealed playing into 1.2 cubes ported.....and that was 4 1 L712...did it get loud....hell yea...it was able to take 1500 with no problem....did it hit the lows well.....it did its job but if u played 20hz..u will get a serious excursion clip cuz it will be trying its best to produce that note....but on rap it worked wonders....but not to get off topic...the front chamber determinds how efficient the box is going to be....but the wierd pat about the front chamber...the smaller the widder the passband will get..it wont be as efficient but it will have a wider passband
so this is y u have to have a balance...get big sealed or ported rear chambers and have the subs play into a big ported chamber and u will have good low end extention and high output

80

vetkilr
07-27-2006, 07:34 PM
thankx

Pop da Hatch
07-27-2006, 07:37 PM
How do you go about changing the airspace from the .75 and the 2.25.....more or less how do you tune the different chambers 80? the 80 and 30 hz they call for is all gravy?

60ndown
07-27-2006, 07:42 PM
6th order big? :)

http://i7.tinypic.com/2193mo1.jpg

60ndown
07-27-2006, 07:43 PM
49.5"x14"

80INCHES
07-27-2006, 07:43 PM
u always tune the rear chamber lower and the front chamber higher
as far as changing ir space ...i'mnot understanding your question

80

80INCHES
07-27-2006, 07:44 PM
6th order big? :)

http://i7.tinypic.com/2193mo1.jpg
i bet thats for 2 10's or 1 12 am i right?

80

vetkilr
07-27-2006, 07:44 PM
6th order big? :)

http://i7.tinypic.com/2193mo1.jpg
what subs???

Pop da Hatch
07-27-2006, 07:44 PM
do you always use the recommended air space via the website? I guess you could tweak it - just curious if the .75 and 2.25 is necessary or there is some ratio.....

60ndown
07-27-2006, 07:46 PM
i bet thats for 2 10's or 1 12 am i right?

80

http://www.decware.com/hwhites.htm

80INCHES
07-27-2006, 07:47 PM
do you always use the recommended air space via the website? I guess you could tweak it - just curious if the .75 and 2.25 is necessary or there is some ratio.....
depending on the sub
i normally call the company and talk to a tech and see what they recommend...other than that i look at the specs and what ever idea comes to my head i just put them in bbp6 or winsd and see how it looks on graph

as far as .75 and 2.25 theres no ratio..u have to desing the box according to the sub


80

60ndown
07-27-2006, 07:47 PM
i have 2 x rlp 12s on an orion 2500d very ****, both faceing towards top port

80INCHES
07-27-2006, 07:52 PM
2 12's in that box....thats small
and rl-p's sound very good in 6th order boxes.....jellyfish had 2 rlp-15's and he was doing 150's easy

whats the specs on that box if u dont mind me asking

80

Pop da Hatch
07-27-2006, 07:52 PM
depending on the sub
i normally call the company and talk to a tech and see what they recommend...other than that i look at the specs and what ever idea comes to my head i just put them in bbp6 or winsd and see how it looks on graph

as far as .75 and 2.25 theres no ratio..u have to desing the box according to the sub


80


yeah - figure it was about the sub - just curious and all. Not many ppl can build a bandpass right.

60ndown
07-27-2006, 07:53 PM
whats the specs on that box if u dont mind me asking

80

http://www.decware.com/hwhites.htm

80INCHES
07-27-2006, 07:55 PM
yeah - figure it was about the sub - just curious and all. Not many ppl can build a bandpass right.
u right about that...

i have 2 re se12's in a 4th order and i'm bass racing 134.94 at the dash all windows up..and i was sandbagging cuz i didnt want to bust out the class...lol
so i know i can bass race in the upper 130's
and thats on stock alt and 1 redtop under the hood and 1 orion 1200d
i just have to find my peak freq and go to town...lol


80

vetkilr
07-27-2006, 07:56 PM
So thats about 4-5 cubes for 2 12s in 6th order then???

80INCHES
07-27-2006, 07:58 PM
yup
and 60in down
thats a nice design
i be it hits the lows really well

80

vetkilr
07-27-2006, 08:01 PM
sweet
know the tuning??

80INCHES
07-27-2006, 08:03 PM
not off the top ..but for a starting point i would tune the rear chamber to 33 or 35hz and the front chamber to 70hz
try that and see how it sounds

80

Chevyaudio
07-27-2006, 08:06 PM
While we are on the subject...I really want to build one of these...just for the hell of it. 80 how much would you charge to design one?

vetkilr
07-27-2006, 08:06 PM
whats your tuned to

CJL
07-27-2006, 08:06 PM
Is it possible the 2 12" Rl-p's or Se's in a 6th order with less power could get louder than 2 12" L7s in a ported box with more power even though L7s are more geared for SPL?

80INCHES
07-27-2006, 08:08 PM
While we are on the subject...I really want to build one of these...just for the hell of it. 80 how much would you charge to design one?
pm what sub and how much power u going to use how much room u have available
and if u want it tuned for sq or sql

80
when u pm me that i will give u a price..

80INCHES
07-27-2006, 08:10 PM
whats your tuned to
mines is tuned to 60hz...but i'm actually going to make my port bigger and tune it to 55hz...so i can peak closser to my cars freq

80

vetkilr
07-27-2006, 08:11 PM
yours is 4th though so yeah bet it hits lows good

80INCHES
07-27-2006, 08:13 PM
Is it possible the 2 12" Rl-p's or Se's in a 6th order with less power could get louder than 2 12" L7s in a ported box with more power even though L7s are more geared for SPL?
2 be honest..i dont know..its possible if u build a reallly efficient bx for the rlp's or se's but beating subs with less power is going to be a challenge within itself

80

CJL
07-27-2006, 08:15 PM
can subs handle more in a 4th or 6th order?

smd4life
07-27-2006, 08:15 PM
While we are on the subject...I really want to build one of these...just for the hell of it. 80 how much would you charge to design one?
x2

iamamp3pimp
07-27-2006, 08:17 PM
80 get at mw on aim please


Lamamp3pimp

80INCHES
07-27-2006, 08:21 PM
80 get at mw on aim please


Lamamp3pimp
i'm at work will get on aim when i get home
that will be 11pm est


can subs handle more in a 4th or 6th order?
depending on the size of the sealed chambers in a 4th order
the smaller the sealed chambers the more power it can handle mechaniclly ...would i put a 20hz note to it..NO...but i will play lil john songs all day and everyday..lol

x2
if u want 1 2..pm me with the same info i told chevy

80

vetkilr
07-27-2006, 08:25 PM
what about me..............lol

I feel left out now

80INCHES
07-27-2006, 08:27 PM
u already got your design...lol

80

vetkilr
07-27-2006, 08:30 PM
Oh..........lol

smd4life
07-27-2006, 08:37 PM
pm sent...

80INCHES
07-27-2006, 08:39 PM
pm answered

80

vetkilr
07-27-2006, 08:39 PM
look what I started

80INCHES
07-27-2006, 08:41 PM
lol yea i see
2 be honset bandpass isnt everything....i just like them alot because i can tune it to give me alot of output with in a given freq range...and within that range it will for the most part destroy a ported box in output

80

CJL
07-27-2006, 08:56 PM
2 be honest..i dont know..its possible if u build a reallly efficient bx for the rlp's or se's but beating subs with less power is going to be a challenge within itself

80

oh yea by more power i mean like 4-500w

vetkilr
07-27-2006, 08:58 PM
Have to be a BIGGGGGGGGG BOXXXXXXXXXXX

iamamp3pimp
07-27-2006, 09:08 PM
that is the drawback.

80INCHES
07-27-2006, 09:16 PM
u right having a huge box is a draw back but the performance make up for it...lol

80

smd4life
07-27-2006, 09:18 PM
maybe drawback on your gas milage?

80INCHES
07-27-2006, 09:19 PM
if u wall it yes...lol

80

vetkilr
07-27-2006, 09:29 PM
I was talkin about the 400-500 watt thing.

Slammed
07-27-2006, 09:37 PM
a single SE was very loud in that box!!



....but Im more into the lows (below 30 hz :yumyum: )

iamamp3pimp
07-27-2006, 10:05 PM
me too.

80INCHES
07-27-2006, 10:59 PM
a single SE was very loud in that box!!



....but Im more into the lows (below 30 hz :yumyum: )
hey slammed
if u thought 1 was loud u should ask melaza how 2 se12's sound in my car:up2somet:
i played some 30hz tones and man-o-man
i dont think my car likes it...espcially my sunroof..lol

80

Slammed
07-27-2006, 11:28 PM
Melaza is a punk!


he's not into car audio anymore!

:crap:

80INCHES
07-28-2006, 12:00 AM
lol dam...i gotta give him a call

80