Giskard, Thanks.
Giskard, Thanks.
ok Ralf,Originally posted by Ralf
That`s my Explanation:
Air in the glass wool moves more slowly. If you put more glass wool in the box, the air needs more time to the wall and back. It`s the same effect as a longer way, a larger enclousure...
Don`t know, if I am right.
Ralf
thats the correct physical definition....the main reason is the longer way for the pressure waves through the wool and back. This is the same like a bigger cabinet. Please don't forget that when using a lot of wool, the efficiency (2 f ??) goes a little less in cause of some energy of the pressure waves goes lost as (little) heat in the wool.
Let's discuss it a little deeper 21st of may
HP
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HP does both chambers have the same tuning?
Or in other words is the port exactly the same for both chambers?
Thanks
It would be real nice if someone with a pair of 4435's would measure the actual tuning frequency of each chamber. I'm curious to see what the actual Fb is.
Hi Guido and Giskard,Originally posted by Giskard
It would be real nice if someone with a pair of 4435's would measure the actual tuning frequency of each chamber. I'm curious to see what the actual Fb is.
I will of cause do a measurement........short after my pay jobs..
I'm also curious whats the result....
Have to carry some PC stuff to the living room.
Guido: the two chambers are geometricaly the same (as my drawings show) For a fb measurement I will also change the woofer cabeling from the left the right.
A fact is (like Giskard wrote) that the lost volume of the high/mid horn/driver is balanced with the additional fiber in this chamber.
The two ports have the same size.
HP
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This should go to the lansing web site for cabinet plans?
Bravo,
Definitely!
Perhaps in a member's plans section.
okok,...fine, but please let me complete them before and correct some mistakes.Originally posted by Giskard
Definitely!
Perhaps in a member's plans section.
HP
PS: in cause of a lot of (non JBL) pay work, I hadn't start with the measurements.....sorry
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This is my definition of a 4435 crossover
HP, any news regarding the corrections?
Thank you!
Hi Guido,Originally posted by Guido
HP, any news regarding the corrections?
Thank you!
I'm workin on them.
But I can tell you, there aren't not that much.
i.e. some bracing woods are a little different and the horn baffle in the main cabinet has no square hole..its a round hole.
maybe tomorrow.....I stored some dwgs in the office.
HP
PS: also the long weekend left his marks.....we had three very long evenings in my living garage with a lot of drinks and a good sound. (you have to try Steve Ray Vaughn's: Tin Pan Alley with good speakers)
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Originally posted by Guido
This is my definition of a 4435 crossover
bo
"Indeed, not!!"
Originally posted by boputnam
Sure you meant the crossovers
hi great thread! awesome speakers! lets say if i wanted to build these speakers what drivers/horn/xover do i need to get? maybe a schematic on the xover if maybe possible to build yourself.
Hi Figge,Originally posted by Figge
hi great thread! awesome speakers! lets say if i wanted to build these speakers what drivers/horn/xover do i need to get? maybe a schematic on the xover if maybe possible to build yourself.
you can get all informations in this forum.
The 4435 need 2 x 2234H, 2426H , 2344 horn and needs a crossover, with 1kHz.
Very special is, that only one of the woofers works in the 100 to 1kHz section. Both woofers work below 100Hz.
HP
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