I've been calling around at several different cabinet making shops around Knoxville where i live and i want to get several estimates before i let my current place start making the box. They are all at a loss b/c they say that if they had a cut sheet for the box they could have an estimate quickly, but Audiobahn's specs for the boxes arent very detailed. I remember seeing a W7 box parameter sheet and it had the dimensions of each and every board, but i guess Audiobahn has so many subs they can't fool with a cut sheet?
I know this might be a little farfetched, but PL or anyone else, is it possible to get the board dimensions for the "Everyday Bass Performer" specs that Audiobahn has on their site?
Its for the AW1206T.
I dunno which is easier, but i would rather have a slot port, which they dont even mention in the specs.
...now i know why people hate Audiobahn.......lol
Replies (8)
ttocs on 01/24/2005 14:24:12
the box dimansions will vary from vehicle to vehicle. Normally you have two measurements that you know(in a trunk for example you have height and width), and you then take the volume you are wishing to have to find the 3rd dimension(in this case depth). We can't tell you how to make your box, especially for a truck...
danielm87 on 01/24/2005 14:34:42
Well, no worries, i've found a guy thats been doing boxes since '86 and he said not to worry about a cut sheet, all he needs is the basic info and he can get it done.
danielm87 on 01/24/2005 22:04:59
Alright, i'm fed up with the estimates i've gotten, the lowest was 185$, highest was 280$. I can build my own at the cost of one 4 by 8 foot 3/4" MDF board - 22 dollars at the local Lowes department, as for construction, i've got the tools and the carpentry knowledge, along with correct box calculations to fit in my truck, it'll be 2.32865 cubic feet with one round 4" x 7.15" port, making the tune frequency 38 Hz, which matches the "Everyday bass performer" recommendations from Bahn.
Rectangle/Square enclosure specs- width-16"/height-20"/depth-16.5".
What type of gain am i going to be looking at after i finish building my new box- anywhere from 3Db~10Db?? (gain is referring to vs. the current pre-fab incorrectly matched box i have now)
Look forward to the pride i can have in building my own box - i called up my brother and he's coming over this weekend to help out, just in case i cut my arm or fingers off.
danielm87 on 01/24/2005 22:42:57
When i was using some port length and volume calculators, i noticed that with each port you add, the longer each one is supposed to be. I'm curious if there is any difference between having one port or two. Maybe the port velocity and sub displacement will change?
P0werLifter on 01/25/2005 01:49:50
Alrighty I ran the numbers through BB6Pro and heres the graph to show your response curve. The Green line is without Cabin gains factored in and the Purple is with the Cabin gains Facotred in (this is an estimate...every automobile will react differently)
Net internal volume of enclosure with displacements accounted for (sub and port) = 2.018 CuFt
Gross internal Volume = 2.329 CuFt
Tuning Frequency= 38hz
There ya go, take a gander, those are just estimates but it will give you an idea. Should sound good and be fairly loud at the tuning Frequency
You should be fine using 1 port, if you add more than one your going to have to use a smaller diameter port for it to work.
Enjoy
PL
danielm87 on 01/25/2005 09:52:45
Wow PL, thats great, thanks. I've seen BB6P selling for 100$ bucks or more at some places online, it seems to be really handy.
And on that note, whenever you get time, i'm interested in having you run the "Ultimate SPL Bass Box" specs thru the program.
W-18"
H-23.2"
D-17"
Thickness-.75"
PTF-36
(ft^3)- 3.211 (internal)
Port- single 4 x 5.21"
You've sparked my interest in the larger box now, with the dimensions, it can still go right in the center of my bench seat where the shifter is, nobody sits there anyways.
P0werLifter on 01/25/2005 13:34:29
Not really much of a difference here, so its up to you on which enclosure you wish to build
swez on 01/26/2005 19:33:10
About ports... the larger the diameter (area of port) the less port velosity we get. Thus, less noise like port whistle as we used to do as kids with a pop bottle, (blowing air across the bottle opening.
Also, depending the target tuning frequency, (PTF) use the larger size port area to prevent port noise.
Since you have access to a port calculator, try using different port diameters as your variable and see the relationship between port area VS PTF and length of the port will vary. The larger the port area (dia.) the longer the port will need to be.
http://www.the12volt.com/caraudio/boxcalcs.asp
Swez
PS If you shooting for lots of deep bass here, a 4" port diameter is recommended. Also, make sure you use a good SS filter on amp input to block out harmful low end SPL.
I know this might be a little farfetched, but PL or anyone else, is it possible to get the board dimensions for the "Everyday Bass Performer" specs that Audiobahn has on their site?
Its for the AW1206T.
I dunno which is easier, but i would rather have a slot port, which they dont even mention in the specs.
...now i know why people hate Audiobahn.......lol
Replies (8)
ttocs on 01/24/2005 14:24:12
the box dimansions will vary from vehicle to vehicle. Normally you have two measurements that you know(in a trunk for example you have height and width), and you then take the volume you are wishing to have to find the 3rd dimension(in this case depth). We can't tell you how to make your box, especially for a truck...
danielm87 on 01/24/2005 14:34:42
Well, no worries, i've found a guy thats been doing boxes since '86 and he said not to worry about a cut sheet, all he needs is the basic info and he can get it done.
danielm87 on 01/24/2005 22:04:59
Alright, i'm fed up with the estimates i've gotten, the lowest was 185$, highest was 280$. I can build my own at the cost of one 4 by 8 foot 3/4" MDF board - 22 dollars at the local Lowes department, as for construction, i've got the tools and the carpentry knowledge, along with correct box calculations to fit in my truck, it'll be 2.32865 cubic feet with one round 4" x 7.15" port, making the tune frequency 38 Hz, which matches the "Everyday bass performer" recommendations from Bahn.
Rectangle/Square enclosure specs- width-16"/height-20"/depth-16.5".
What type of gain am i going to be looking at after i finish building my new box- anywhere from 3Db~10Db?? (gain is referring to vs. the current pre-fab incorrectly matched box i have now)
Look forward to the pride i can have in building my own box - i called up my brother and he's coming over this weekend to help out, just in case i cut my arm or fingers off.
danielm87 on 01/24/2005 22:42:57
When i was using some port length and volume calculators, i noticed that with each port you add, the longer each one is supposed to be. I'm curious if there is any difference between having one port or two. Maybe the port velocity and sub displacement will change?
P0werLifter on 01/25/2005 01:49:50
Alrighty I ran the numbers through BB6Pro and heres the graph to show your response curve. The Green line is without Cabin gains factored in and the Purple is with the Cabin gains Facotred in (this is an estimate...every automobile will react differently)
Net internal volume of enclosure with displacements accounted for (sub and port) = 2.018 CuFt
Gross internal Volume = 2.329 CuFt
Tuning Frequency= 38hz
There ya go, take a gander, those are just estimates but it will give you an idea. Should sound good and be fairly loud at the tuning Frequency
You should be fine using 1 port, if you add more than one your going to have to use a smaller diameter port for it to work.
Enjoy
PL
danielm87 on 01/25/2005 09:52:45
Wow PL, thats great, thanks. I've seen BB6P selling for 100$ bucks or more at some places online, it seems to be really handy.
And on that note, whenever you get time, i'm interested in having you run the "Ultimate SPL Bass Box" specs thru the program.
W-18"
H-23.2"
D-17"
Thickness-.75"
PTF-36
(ft^3)- 3.211 (internal)
Port- single 4 x 5.21"
You've sparked my interest in the larger box now, with the dimensions, it can still go right in the center of my bench seat where the shifter is, nobody sits there anyways.
P0werLifter on 01/25/2005 13:34:29
Not really much of a difference here, so its up to you on which enclosure you wish to build
swez on 01/26/2005 19:33:10
About ports... the larger the diameter (area of port) the less port velosity we get. Thus, less noise like port whistle as we used to do as kids with a pop bottle, (blowing air across the bottle opening.
Also, depending the target tuning frequency, (PTF) use the larger size port area to prevent port noise.
Since you have access to a port calculator, try using different port diameters as your variable and see the relationship between port area VS PTF and length of the port will vary. The larger the port area (dia.) the longer the port will need to be.
http://www.the12volt.com/caraudio/boxcalcs.asp
Swez
PS If you shooting for lots of deep bass here, a 4" port diameter is recommended. Also, make sure you use a good SS filter on amp input to block out harmful low end SPL.
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