for inquiring minds - midrange enclosure

[vasyachkin]

since you asked what is the best midrange enclosure i just invented a new type which is better than the nautilus but also not as boring as a regular box

basically it is an hour-glass thing open in the back

the constriction in the middle causes the air to move at maximum speed and is also where you put the most stuffing so the attenuation of the wave is very high. the rear of the hour-glass should be shaped like a gramophone (exponentially expanding) to reduce reflections

you can start thinking about why this is better than nautilus and maybe i will help you with your struggle later

[daneasterling]

[Mr.Thomas Aaron Hero]

[unknownuser]

(Originally posted by: george of the jungle)

[Mr.Thomas Aaron Hero]

[curt_c]

> basically it is an hour-glass thing open in
> the back

> the constriction in the middle causes the
> air to move at maximum speed and is also
> where you put the most stuffing so the
> attenuation of the wave is very high. the
> rear of the hour-glass should be shaped like
> a gramophone (exponentially expanding) to
> reduce reflections

Assuming the mass of the stuffing was held constant, why do you think that the attenuation would be greater with higher density stuffing in a smaller area, compared to a lower density stuffing over a larger area?

Perhaps you'd like to explain your reasoning on attenuation vs. airspeed vs. stuffing density.

Interestingly, if you stretch your hourglass out to a long length, it will essentially be the Nautilus design. -with a horn on the terminus...

C

[unknownuser]

(Originally posted by: george of the jungle)

[Andy_G]

Methinks Vas also needs to do some research on moving air through restrictions, and the mechanics thereof.

May then he could reinvent the wheel !!

[Andy_G]

[Andy_G]

[unknownuser]

(Originally posted by: george of the jungle)

[Andy_G]

looks like a nice design though ;-))

[waynew]

> Methinks Vas also needs to do some research
> on moving air through restrictions, and the
> mechanics thereof.

> May then he could reinvent the wheel !!

I am starting to suspect that Vas' light shines so bright that he is often blinded by his own brilliance.
Vas. I am an engineer, and I have a hard time following your "logic". With the way your midn works, You may want to look into a career with DARPA or the CIA. It's either that or you open up a palm reading parlor in New Orleans.

[Pete Schumacher ®]

> looks like a nice design though ;-))

of Vas's speaker!!! ;-D

But seriously, any chamber of sufficient volume containing stuffing that allows easy air flow is anechoic and will do as well as any other in eliminating any kind of reflection from an opposing wall and back out the driver. A golden ratio rectangular enclosure would work very well when stuffed.

[chee]

[unknownuser]

(Originally posted by: Edgar Winters)

[polpotpie]

You're older than I gave you credit for and you must be Italian. Is the name George or Giovanni? Give it up, kid. You have "invented" nothing and you simply aren't that good. Seek professional help for those delusions of grandeur.

[Andy_G]

> of Vas's speaker!!! ;-D

They can't be his.. he has never built any !!!

That's why he knows so much about it ;-)

[vasyachkin]

> looks like a nice design though ;-))

i did not say HALF i said the FULL hour glass.

all of the pics you posted are ripoffs of B&W and are nothing like what i am suggesting

[vasyachkin]

> Assuming the mass of the stuffing was held
> constant, why do you think that the
> attenuation would be greater with higher
> density stuffing in a smaller area, compared
> to a lower density stuffing over a larger
> area?

stuffing is nothing but acoustical resistor. if you arrange resistors in series (as opposed to parallel) you get more energy dissipated in them for same current. this is the logic behind nautilus type speakers - to get more damping out of less stuffing. problem is by improving performance in one area nautilus creates a serious problem in another (a sharp discontinuity at the end of the pipe) which my design solves.

the reason nautilus did not go with my design is because theirs looks more streamlined and sexy. remember nobody can understand jacksh1t about speakers (as evidenced by responses in this thread) so manufacturers have to focus on aesthetics.

> Perhaps you'd like to explain your reasoning
> on attenuation vs. airspeed vs. stuffing
> density.

attenuation is energy dissipated by resistance. thin wire will have faster moving electrons and greater resistance thus greater dissipation than thick wire. a stuffed pipe is same thing as resistor except that instead of electrons you have gas molecules.

> Interestingly, if you stretch your hourglass
> out to a long length, it will essentially be
> the Nautilus design. -with a horn on the
> terminus...

thats like saying that if you crush a supermodel's face with a baseball bat, break her legs and make her gain 80 pounds she will essentially be a housewife. yes, nautilus is the degenerate version of my design and that is the precise idea.