A hifi bargain...

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http://www.tweekgeek.com/bybee-holographic-ac-adapter/

Bybee Holographic AC Adapter
RRP: $2,795.00
Now $2,295.00.

Re: A hifi bargain...

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The next logical progression from "directional" cables.

"Whileever there're stupid people with money, there'll be smart people to  
take it from them."

A couple of decades ago, a friend and I contemplated ordering a special run  
of twin-core "AC flex" (you know the type, used to connect lights & switches  
in 99.999% of Australian households) in black. The plan was to sell it to  
audiophiles for $100/metre as "super-high-grade lossless pure copper  
ultra-transparent" speaker cable.

We gave up on the idea when we realised neither of us was capable of keeping  
a straight face for long enough to sell it to anyone. I can guarantee though  
that it would've performed better than any of the $300-$500/metre crap being  
flogged commercially.

--  
Bob Milutinovic
Cognicom


Re: A hifi bargain...
Bob Milutinovic wrote:

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This is the reason behind the invention of salesmen.


Re: A hifi bargain...
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The internet is good for this as well.  
Have a couple of drinks, throw up a web page and the job is done!

--  
:-P

Re: A hifi bargain...

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Exactly, and if you hire salesmen with no understanding of electronics, you  
simply need to make them believe the bullshit, and they will have no problem  
keeping a straight face! :-)
A highly (pseudo) technical "white paper" on the benefits (which they will  
not understand) is a good way to "inform" them and their customers. :-)

Trevor.



Re: A hifi bargain...
On 23/07/2014 2:54 PM, Trevor wrote:
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What is the difference between a HiFi salesman and a used car salesman?  
- the used car salesman knows when he is lying.

Re: A hifi bargain...

"Tony"

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** Simple, no math explanation:

Inductance is the result of the magnetic field that accompanies any wire  
carrying a current.

However, if somehow another *equal and opposite* current flows in the exact  
same position as the first wire, the two fields oppose and no field is  
created -  hence no inductance.

Placing two wires in parallel, fig 8 style, with current flowing in opposite  
directions approximates the situation.

A co-axial cable gets closer due to its symmetry.

Two flat strips with a very small gap between gets closer again.



....  Phil








Re: A hifi bargain...

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Possibly. Plenty of things are *easily* measureable these days, but NOT  
audibly detectable to any human being in a proper double blind test.
You'd have to conduct a well controlled one to find out for sure.

Trevor.



Re: A hifi bargain...
On 23/07/2014 12:44 PM, Trevor wrote:
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Well yes, and such tests have been done before.



Re: A hifi bargain...
On Tue, 22 Jul 2014 11:23:58 +1000, "Bob Milutinovic"


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Some cable with a diode added? :P

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It wouldn't surprise me.

A real, know nothing IDIOT


 "Yaputya the  MORONIC TROLL"

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** Crap is just what your pointy, retarded head if chock full of.

    FOAD  -   you pathetic ass.



....  Phil






Re: A real, know nothing IDIOT
On 23/07/2014 3:05 PM, Phil Allison wrote:
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You don't understand that a dip at 15 kHz isn't perceived by an old fart  
like you (you must be around 60 years old, you'd be over 40dB down at  
15kHz).
You are the biggest TROLL in USENET.
http://members.iinet.net.au/~rutlidge/alanindex.html




Re: A hifi bargain...

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You are generalising (and are correct up to a point) while Trevor Wilson
claimed a *very specific* example where bad speaker impedance problems can
require suitable low inductance cables to work properly.
Either you can't read or simply like arguing at a tangent. Mind you, I think
TW was simply confirming the general rule by pointing out a few limited
exceptions :-)

Trevor.







Re: A hifi bargain...

"Trevor"
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** The AR11 and the original Quad ESL57 are among your "very few".

FYI:

The AR11 dips to 2ohms between 4kHz and 11kHz.

The ESL57 dips to 1.8 ohms around 17kHz.

A friend had stacked ESL57s, using low inductance ( ie 144 strand woven )  
cables with them made a HUGE audible difference compared to even 4sq.mm  
conductor twin cable.


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**  Don't you know  ??

Hint:  TW use to sell the horrible things .....


....  Phil







Re: A hifi bargain...
On Sat, 26 Jul 2014 14:43:09 +0200, BuckyBalls wrote:


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Nope. Your arguments were fine until you trotted this out with ALWAYS.  
You could have easily gotten away with MOST, but not all are affected.

In any case, age has SFA to do with the argument.


Re: A hifi bargain...
On 26/07/2014 9:51 PM, news13 wrote:
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Yes it does. 99.99% of aged people (and a lot of them before age 30)  
have hearing loss to the point where the cable choices are completely  
irrelevant as they can no longer hear the frequencies that are affected  
- assuming they ever could.



Re: A hifi bargain...
On Fri, 01 Aug 2014 07:20:27 +0800, Clocky wrote:

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Okay, show me some real numbers and not figures from the nether region.

The real problem is that most people never heard decent speakers to hear  
good one to hear the detail. Now it is all artificil anyway.

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At one stage, every kid was getting a good, but freq detailed, hearing  
test at school. No idea if that still happens . So there would have been  
figures to show what percentage.


Re: A hifi bargain...
On 1/08/2014 3:17 AM, news13 wrote:
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The 99.99% figure wasn't qualified by any age group etc. Check the many  
studies of Presbycusis and you will see a consensus that high frequency  
age related hearing loss is unavoidable.
http://www.minnesotamedicine.com/Past-Issues/Past-Issues-2007/October-2007/Clincal-Huang-October-2007

Everyone's high frequency hearing deteriorates as they age.
There are several reasons including damage from high environmental sound  
levels (industrial deafness etc.) and simply wearing out of the ear's  
hair cells.
http://auditoryneuroscience.com/?q=acoustics/clinical_audiograms



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High frequency age-related hearing loss happens whatever speakers you have.
Put it this way - when you were a teenager you probably could hear the  
high frequencies easily. As you age, the only way to get the same  
perceived sound is to compensate for the high frequency loss - i.e. use  
a graphic equaliser etc.. Otherwise the enormous difference in  
sensitivity from the low frequencies to the high frequencies cannot  
possibly lead to the same perceived sound. Some older people fool  
themselves into thinking they hear just as well as when they were young,  
but that is explained by the slow deterioration in hearing that ocurrs  
and the inability of people to make comparisons over several years of  
gradual high frequency hearing loss. And just cranking up the overall  
volume won't correct the relative frequency response - if your hearing  
is down over 50dB at 15kHz, you'll have to boost those high frequencies  
by 50dB to hear it like a teenager does.

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Re: A hifi bargain...
On Fri, 01 Aug 2014 14:02:55 +0200, BuckyBalls wrote:

 you'll have to boost those high frequencies
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Given the crappy sounds I heard when I was a teenager, that is something  
to be glad for. I can still hear the parts of an orchestra just as well.

Re: A hifi bargain...

"Trevor Wilson"
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*** More than a couple...

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*** An audiogram is NOT a response curve !!!!!
      ---------------------------------------------------

Several posters have made the really dopey error of equating audiograms  
showing " hearing loss " -  as defined by audiologists -  with frequency  
response and refuse to be corrected on the point.

Audiologists concentrate on finding the **faintest sound** a person can hear  
at a given frequency, which has no relevance to what the same person CAN  
easily hear when listening to music -  live or reproduced at realistic  
levels.

Take look at the famous equal loudness curves by Fletcher-Munson et alia:

http://en.wikipedia.org/wiki/Fletcher-Munson

Firstly, it shows that the just audible threshold at 20Hz is 70dB SPL  !!

At 10kHz, the threshold is around 10dB SPL, for a young person.

So, if an older person had a measured 40dB loss at 10kHz - all that means is  
their threshold is now at 50dB SPL.

Such a person would perceive high frequencies perfectly well for reproduced  
music played above a background level.



....  Phil






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