Hi,
I know search for optimal mini sub is well talked on the web. I've read all i can find...But most of time, it is for max spl. I think tapped horn can be also use to get very small cabinet with very flat frequency from 20 to 200hz. It would not be efficient, but it would be to use at low level at home, only for bass playing. I cannot access to picasa to upload images, so i'll have to explain.I can't post now hornresp simulations.
First, i made simulation with all tang band speakers from 2 4" wich was not so bad, to 8"...i tryed with some B&C speaker (10nw64,8nw81,8fg51)...But as i can go 4ohm, it's not so much optimal until i get a 4 ohm speaker, or 2 8 ohm. I've tested with some 18sound, some sica, seas, and some ciare pro, faital. And that here i discover ciare public range speakers... the cw258nd is a 10" 4 ohm speaker with a very low VAS.
In a 5 segment tapped in only 20 liters it reach a near flat response from 30 to 180 hz with a group delay of 20ms @30hz (not so bad) at 92-94 db @1pi space (nead a wall). With 12 watts, it make 100 db. Diaphragm displacement is only 2,5mm...far from the 9 mm xmax. The impulse response is bad, but as it only for sub...i don't know if it really matter.
I choose first this speaker because it the only 10" 4ohm speaker with a VAS near 20 without going for rubber surround.
His xmax limit would be reached at 100w, and it would push 110 db.
After all, if finally it is possible, it should maybe realized in a kind of Bill Fitzmaurice Jack10 like this Another Jack 10 build - Page 2 - finnbass.com ; It is a interesting way to do a cubic tapped horn and seems to work well.
As it's only numbers for me, does 100-110 db in a 1pi space seems you "enough" ?
There would be a active crossover in the 180 range to mix with a guitar cabinet used as "medium-high" speaker. The idea is to have practice bass, and guitar cabinets, in the smallest volume possible keeping good lows. A small tda chip amp would run the low (and maybe after something bigger) and a 1w SE UL ECL82 for the medium/high.
I need your help because it's only simulation. I tryed to do the best i understood from what i've found on the web. But it would be the first time i try tapped horn.
Did i misunderstand something ?
Does it seems you a interesting ?
Any suggestion ?
Just for fun i tryed something else...It seems too that the guitar speaker eminence governor 16 ohm in his 30L closed box should get near the same response in a 15L tapped horn (very hard to make, but seem possible). As it's for guitar, resonnance, and distortion is not so much a problem. It could be great, or bad.... But i'm really not convinced...
I know search for optimal mini sub is well talked on the web. I've read all i can find...But most of time, it is for max spl. I think tapped horn can be also use to get very small cabinet with very flat frequency from 20 to 200hz. It would not be efficient, but it would be to use at low level at home, only for bass playing. I cannot access to picasa to upload images, so i'll have to explain.I can't post now hornresp simulations.
First, i made simulation with all tang band speakers from 2 4" wich was not so bad, to 8"...i tryed with some B&C speaker (10nw64,8nw81,8fg51)...But as i can go 4ohm, it's not so much optimal until i get a 4 ohm speaker, or 2 8 ohm. I've tested with some 18sound, some sica, seas, and some ciare pro, faital. And that here i discover ciare public range speakers... the cw258nd is a 10" 4 ohm speaker with a very low VAS.
In a 5 segment tapped in only 20 liters it reach a near flat response from 30 to 180 hz with a group delay of 20ms @30hz (not so bad) at 92-94 db @1pi space (nead a wall). With 12 watts, it make 100 db. Diaphragm displacement is only 2,5mm...far from the 9 mm xmax. The impulse response is bad, but as it only for sub...i don't know if it really matter.
I choose first this speaker because it the only 10" 4ohm speaker with a VAS near 20 without going for rubber surround.
His xmax limit would be reached at 100w, and it would push 110 db.
After all, if finally it is possible, it should maybe realized in a kind of Bill Fitzmaurice Jack10 like this Another Jack 10 build - Page 2 - finnbass.com ; It is a interesting way to do a cubic tapped horn and seems to work well.
As it's only numbers for me, does 100-110 db in a 1pi space seems you "enough" ?
There would be a active crossover in the 180 range to mix with a guitar cabinet used as "medium-high" speaker. The idea is to have practice bass, and guitar cabinets, in the smallest volume possible keeping good lows. A small tda chip amp would run the low (and maybe after something bigger) and a 1w SE UL ECL82 for the medium/high.
I need your help because it's only simulation. I tryed to do the best i understood from what i've found on the web. But it would be the first time i try tapped horn.
Did i misunderstand something ?
Does it seems you a interesting ?
Any suggestion ?
Just for fun i tryed something else...It seems too that the guitar speaker eminence governor 16 ohm in his 30L closed box should get near the same response in a 15L tapped horn (very hard to make, but seem possible). As it's for guitar, resonnance, and distortion is not so much a problem. It could be great, or bad.... But i'm really not convinced...