Re: Re: More Thoughts ...
A non-polar capacitor's physical construction does make it non-symmetrical...
and that capacitors can be affected by vibration is pretty easy to demonstrate...
And i think it is pretty much agrred that wire can sound different (ie difference exists, it becomes a question of degree)
dave
MJL21193 said:
A non-polar capacitor's physical construction does make it non-symmetrical...
and that capacitors can be affected by vibration is pretty easy to demonstrate...
And i think it is pretty much agrred that wire can sound different (ie difference exists, it becomes a question of degree)
dave
Wow. I was tired, so went to bed early last night, then this morning two full pages of posts to read.
Hi John.
I agree with you re the Decware. Capturing and re-using energy via a box might help generate an impression of improved frequency response, yet it cannot do anything for the initial dynamics of music reproduction.
Going back to my absorbent carpet roll tests; you could try wrapping a rolled up soft blanket around the perimeter and between your wooden roundovers.
You might try over the rounded wood as well.
Cheers ......... Graham.
Hi John.
I agree with you re the Decware. Capturing and re-using energy via a box might help generate an impression of improved frequency response, yet it cannot do anything for the initial dynamics of music reproduction.
Going back to my absorbent carpet roll tests; you could try wrapping a rolled up soft blanket around the perimeter and between your wooden roundovers.
You might try over the rounded wood as well.
Cheers ......... Graham.
johninCR I've been revisiting your original drawing somewhere around page 16 of this thread. The tube or TL is shaped as a series of steps, each step becoming greater in CSA. If I then refer back to a site which GM recommended me to with experiments on a pipe. It showed how an increase in area of a tube became a low pass filter. I don't know if this works if the increase in CSA goes from a given point right to the end. It does seem possible though that making the TL the way you have is like a series of low pass filters and maybe why on a test done by Mr. Olsen on one of his designs there was no higher frequency at the terminus, if his design was in steps. Maybe GM will throw up his hands in horror again and say, " will he never understand.". I am trying.
Maybe Scottmoose could say whether the stepped horns on the spawn of Frugelhorn series pass less higher frequencies than the more evenly tapered horns.
jamikl
Maybe Scottmoose could say whether the stepped horns on the spawn of Frugelhorn series pass less higher frequencies than the more evenly tapered horns.
jamikl
Re: Re: Re: More Thoughts ...
"...it becomes a question of degree." The difference, if there at all, is not audible - it exist only in the mind of the misled individual.
As complicated as speaker construction and room acoustics are, the human brain is infinitely more-so, especially if trained to listen for something that can't be heard, but must be there.
planet10 said:
"...it becomes a question of degree." The difference, if there at all, is not audible - it exist only in the mind of the misled individual.
As complicated as speaker construction and room acoustics are, the human brain is infinitely more-so, especially if trained to listen for something that can't be heard, but must be there.
Armed with all of the information gleened from this forum and others regarding all of the potential causes/sources for inferior audio, the beginner may as well give up before he begins. And while he's at it, give up listening to music also, because it's impossible to make it sound good, what with all of the caps installed(potentially!!??) backwards or his interconnects are just plain old copper(not even oxygen free), or perhaps refraction off the sharp edges of his cabinet are burning a hole in his forehead, or the material he used to build it is absorbing all of the best sounds. The list goes on.
Tannoy on OB
Hi All,
I just discovered this thread. I found it quite interesting that Lynn mentioned near the beginning of the thread the possible project of mounting Tannoy coaxial drivers on OB's.
I did that four years ago. See,
http://www.tnt-audio.com/shows/maf03_e.html
It is amazing how fast time has flown by. It is also gratifying to see that what was viewed as a weird idea then is catching a lot of interests today.
Cheers,
Kurt
Hi All,
I just discovered this thread. I found it quite interesting that Lynn mentioned near the beginning of the thread the possible project of mounting Tannoy coaxial drivers on OB's.
I did that four years ago. See,
http://www.tnt-audio.com/shows/maf03_e.html
It is amazing how fast time has flown by. It is also gratifying to see that what was viewed as a weird idea then is catching a lot of interests today.
Cheers,
Kurt
MJL21193 said:
I'm not believer in at least of 90% of Fi-Fi mumbo jumbo; also-I heard dozens of raved audio products ,many of them I have chance (unfortunate) to repair...and I'm pretty dissapointed with all that FiFi mist.....
but-your point is?
without intention to argue - and this one is first and last post regarding this from me to you- it's sometimes hard to defy laws of physics........even what ears can or can't hear
I'm blessed........I spend my time listening to music ,and just toying with audio toys......caps,wires,spks including
and a picture of some speakers from the same brochure.
A few years ago Syntec International In Australia was able to supply me a replacement tweeter for one of my 90 series speakers (not dual concentric).
These dual concentric drivers may still be available as a spare part.
Edited:
I re-read the earlier messages, these are 8 inch, certainly not the 15 inch paper cone as mentioned.
Hopefully this is still of interest to someone.
A few years ago Syntec International In Australia was able to supply me a replacement tweeter for one of my 90 series speakers (not dual concentric).
These dual concentric drivers may still be available as a spare part.
Edited:
I re-read the earlier messages, these are 8 inch, certainly not the 15 inch paper cone as mentioned.
Hopefully this is still of interest to someone.
johninCR said:
Breaking water into hydrogen and oxygen is trivial. No breakthrough is needed, unless you wish to defy the basic laws of the universe - then, good luck. The problem with molecular hydrogen as a form of energy, is just that; it's a form of energy, nothing more. There is no source of hydrogen that comes without the input of energy, and never will be - at least on this little planet. Energy is released when water is formed from hydrogen and oxygen. Conservation of mass/energy requires that the same amount of energy be supplied to reform oxygen and hydrogen from water.
Now, if you have a clever way to fuse hydrogen into helium, then that's another story and decidedly non-trivial.
Sheldon
Sheldon said:
Sheldon,
Since it's so trivial, how about breaking water into hydrogen and oxygen at say 50% efficiency (without being too greedy) using the energy of sunlight? That wouldn't break any laws of the universe, yet it would revolutionize the world as we know it, and would be a relatively easy switch from carbon based systems.
johninCR said:
OK, but the problem is not hydrogen generation, which can be done efficiently via hydrolysis. http://www1.eere.energy.gov/hydrogenandfuelcells/pdfs/review04/hpd_p11_ingersoll.pdf The problem is harnessing sunlight. At present, photovoltaic cells are around 15% efficient. Getting to 50% is quite possible at some point in the not too distant future. It will be part of the enegy equation, no doubt.
Sheldon
Another coaxial option ...maybe....
http://www.paacoustic.com/Product_Detail.asp?CatalogID=0108&ProductID=BM-12CXA
and
http://www.paacoustic.com/Product_Detail.asp?CatalogID=0108&ProductID=BM-12CX38
The BM12CX38 have 90 degree dispersion pattern and 2 inch compression driver.
The BM12CXA look good on paper.
And this:
http://www.paudiospeakers.com/paudio.html
On the first foto in this adress the BM12CX38 look really impressive.
http://www.paacoustic.com/Product_Detail.asp?CatalogID=0108&ProductID=BM-12CXA
and
http://www.paacoustic.com/Product_Detail.asp?CatalogID=0108&ProductID=BM-12CX38
The BM12CX38 have 90 degree dispersion pattern and 2 inch compression driver.
The BM12CXA look good on paper.
And this:
http://www.paudiospeakers.com/paudio.html
On the first foto in this adress the BM12CX38 look really impressive.