> Hi end customers demand visual art as well as performance
But " art " does not necessarily demand
1" thick faceplates ... et. al.
( not that 1" faceplates can't be artsy )
But " art " does not necessarily demand
1" thick faceplates ... et. al.
( not that 1" faceplates can't be artsy )
That amp looks like a real prototype, especially from the past. A real commercial amp today, is about 10 times more complicated. I wish that I could work on banat's prototype rather than the one on my bench at the moment.
No, it's not. But it's hardly the equivalent of the gross inefficiency of hogging an entire chassis out of a solid block of aluminum.
se
Boeing does wings and other parts that way. It actually is an economical choice for some cases. I have done few that way. Latest is for a Twin T filter.
Well, better than copper, although the latter is a better magnetic shield without the deleterious effects of ferromagnetic activity.
Only half-kidding. On the side, I used to design equipment for locating buried pipes. The cast iron was difficult for the remote transmitter to penetrate, the copper even worse most of the time.
Wait, what? Copper is a better magnetic shield than what? You mean steel? Because as far as I'm aware, aluminum is not ferromagnetic. And if you think copper is a better magnetic shield than steel, then what is copper's permeability relative to steel? I believe copper's permeability is not much greater than that of air. So I fail to see how it can possibly be a better magnetic shield than steel. A better electrostatic shield than steel, sure, but not a better magnetic shield.
se
Interesting but not true. While the margins on the Beats products are large by any standards they were significantly more expensive than $20 to make. (I know.) And I know of no unnecessary steel in the product. Adding weight to a headphone really is a bad idea. They are all too heavy already.
The sound characteristic was Jimmy, Dr. Dre and Noel Lee. No one else had much input (grumble grumble). Keep in mind that had they never been marketed none of us would ever give headphones a second thought. Now we all have a punching bag for how not to make a headphone sound.
I'm not sure I understand what you are describing. A Plane wave tube for measuring the transducers is a good solution. I'm not sure how using one for free field would work? You still have a lot of issues around the relationship between the transducer and the ear, which angle and how far. the Pinna becomes a key modifier and I believe Pinna are almost as unique as fingerprints.
Most headphone and headphone driver vendors ask for a response curve. They do not have any idea what make a headphone good and waffle like a politician when asked for their best sounding sample.
There is no ideal curve for a headphone, except for I think 3 or 4 really different curves. Once you remove the head and outer ear you are in difficult territory for finding "ideal". Most headphones are someones judgement on how they should sound. Same for high end speakers so its all the same. . .
It's the conductivity that is better, not the permeability. Consider superconductors for instance. They are ideal shields for E and B fields, (if, for B fields, of a suitable topology) except (at this date) a bit inconvenient due to the required cryogenic operating temperatures.
Olive and coworkers have done some recent work on response curves that should be reviewed by anyone interested in the subject.
Everyone: just check out [ dr dre headphone breakdown] on Google and look at the article from the Huffington Post. That should be enlightening! Then Demian, we can discuss where I went wrong. '-)
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It's precisely its better conductivity that makes it the better electrostatic shield. For magnetic shielding, you want high permeability not conductivity.
Superconductors make for a good magnetic shield not because of their high electrical conductivity, but because they are diamagnetic.
I think you have a bit of studying to do.
se
Why don't you read some of the critiques of that article instead of just regurgitating without question?
Oh, and where are the mold costs listed in that breakdown?
se
Steve, think about it a just little harder. And seal the entire box extremely well before building the model in your head. (Time varying, low frequencies that we typically worry about, too)
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For 0Hz magnetic fields that's definitely true (mumetal is best), however what about alternating fields? Higher conductivity means stronger eddy currents to nullify the flux.
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