Not really a guru, but I think there might be some rough cancellation of coil tempco possible. But changes in suspension and compliance would be harder.
But aren't there better materials available that would reduce the hysterisis or compliance variation in speaker suspensions?
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I also was uncomfortable with Clarabell, but I really liked Princess Summer-Fall-Winter-Spring! In 1965, I dated a former member of the 'Peanut Gallery', what an honor! '-)
How about Soupy Sales or Engineer Bill, that dummy on Howdy Doody probably was the inspiration for Chucky from someones childhood nightmares!
Keantoken,
There are lots of things you can do to improve on the surround termination and even the spiders properties but those still don't counter the electrical changes that happen in the majority of drivers due to the changes of coil position. I have a couple more experiments to do with some spider designs and an idea I have for an alternative to the standard half roll surround for larger excursion without making the surround really wide which is a no no in my understanding. Making a surround that allows larger excursions and doesn't cause rocking or to much out of phase response is the concept I am working on but theory and reality are not always what we get when we attempt to make these kinds of changes.
Keantoken,
There are lots of things you can do to improve on the surround termination and even the spiders properties but those still don't counter the electrical changes that happen in the majority of drivers due to the changes of coil position. I have a couple more experiments to do with some spider designs and an idea I have for an alternative to the standard half roll surround for larger excursion without making the surround really wide which is a no no in my understanding. Making a surround that allows larger excursions and doesn't cause rocking or to much out of phase response is the concept I am working on but theory and reality are not always what we get when we attempt to make these kinds of changes.
You're wing nice and diplomatic again. I have another two words for it which I would get banned for using.
Yep -- it hits the fruitloopery (New Scientist's word for it) criteria - spurious use of "Quantum"... And downhill all the way from there...
Can we know which aerospace company, so we don't accidentally travel in one of their aircraft? One of the unwritten rules of the Institute of Physics is that Members are not allowed to travel in vehicles designed using alien technology.
I've forgetten most of my chemistry, but isn't the point of PTFE that it is nicely zen and inert?
There is seriously nothing in that quoted blurb that's not a lie or a stunning misconception, right down to the "the" "a" and "and." The free radical nonsense is just one bit.
It pains me that there are people out there who are stupid enough to swallow this kind of huckstering, so that there's profit in spreading ignorance.
It pains me that there are people out there who are stupid enough to swallow this kind of huckstering, so that there's profit in spreading ignorance.
I blame schools. Kids are no longer educated, but merely trained to jump through hoops. Hence they leave school ignorant, knowing lots of words but no meanings, which makes them easy prey for hucksters. In some cases I suspect the 'retail hucksters' may have been conned by 'wholesale hucksters'; it is easier to sell snake oil if the seller drinks it himself, as then he doesn't have to fake sincerity.
Adults, of course, generally believe one or both of the following myths:
1. I am wise enough to spot something which is obviously untrue.
2. The authorities won't allow people to say things which are obviously untrue.
Adults, of course, generally believe one or both of the following myths:
1. I am wise enough to spot something which is obviously untrue.
2. The authorities won't allow people to say things which are obviously untrue.
I did try very hard to teach the children to understand marketing speak when watching TV together. Only so far has worked on one of them.
In the case of cables it's easy to understand. Most of the profit on a system sale comes from the cables and accessories. Same as when you buy a TV they desperately try to sell you a £50 'special' gold plated HDMI connector. They probably make more on the cable than on the TV!
The shame is, like Marvel comics they have to come up with ever more outrageous claims.
In the case of cables it's easy to understand. Most of the profit on a system sale comes from the cables and accessories. Same as when you buy a TV they desperately try to sell you a £50 'special' gold plated HDMI connector. They probably make more on the cable than on the TV!
The shame is, like Marvel comics they have to come up with ever more outrageous claims.
So, maybe there's a superhero out there whose power is making electrons sound better by herding them through cables... "Hifi Electron Man"?
In most cases it is ignorant greed along with a tendency toward exhibitionism which fuels such markets. Bit like selling a superior mayonnaise.
My neighbor two houses down the road returned from Trinidad a week ago, had to go there to solve a problem at the LNG facility in Point Fortin on the isle. In february, his employer Shell completed the takeover of the BG Group (British Gas), a large shareholder of Atlantic LNG on Trinidad.
The neighbor is ocassionally asked to do assignments out of his current job description. Ranges from riser calculations in his office at the Shell E&P complex in Rijswijk, to visiting plants abroad.
At an earlier date, he told me the younger collegues lack the hands-on calculation skill and knowledge, no longer thoroughly taught at university (not as much as PP anyway
)My neighbor graduated from my faculty in '82, must be in his early 60s by now. He commented that the recent earthquakes on Trinidad were rather frightening.
All the particle beam machines need levels of precision in the micron range around the entire structure. Synchrotron machine beamline users, some are sensitive to the nanometer range. We are about 10 miles from the south shore, and some of the users have issues with the periodicity of the waves on the beach. They see the deflection of the beam as a result of the waves, especially if the surf is a foot or two. Being two miles from the nearest expressway, we also have problems with rush hour traffic, specifically trucks taking things east in the morning rush.
These two things are the reason the International Linear Collider can't be built here, they need beam stability down in the 2 to 3 nanometer range.
Now for your "test". You will be graded.🙂
1. Why shields? the load impedances are two orders of magnitude below the cable impedance, e coupling is not an issue, the braid cannot m shield.
2. Why 3 pair? Are you tri-amping it as you typically explain you do?
Bonus questions:
3. Why did I specify those load resistor values, and why do I recommend the use of 4 pairs of wires?
4. Why is simply purchasing a cable with three twisted pairs shielded/insulated not a guarantee of inter-pair crosstalk in the audio band at the load impedances being discussed?
No. Actually, It's a good process for getting near-room temp superconductivity. Turns out some scientists have used a scanning tunneling electron microscope to view cooper pairs on HTS materials, and the found some key points necessary for superconduction.
Cooper pairs, as it turns out, join up when there is a slight lattice mechanical vibration (in the 20 to 20K region), when there is a lack of photons in the visible spectrum, and when especially when the surface structure is wetted with an alcohol mixture modified by some proprietary surfectants (sp) and volatiles. Seems the manu stumbled upon this very special set of circumstances when they cast and cool the copper.
Some mood music, dim the lights, add some alcohol, voila...the electrons pair up...
Note: I just know some kook is gonna take that explanation and run with it.😱
Then how do you even get into cars. Anybody who learned cars under the hoods of vehicles pre-1980-90 has already learned that present day cars are filled with alien technology. I have no chance of understanding those darn computers...
John
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