NACA5 direction
Posted by: kinetic on 31 August 2003
The NACA5 was taken out from the amp and speakers terminals, moved and now I'm not sure which end to which (on the rush of moment, forget to do markings on it). And couldn't find any arrows on the cables. Anyone please help if it's possible to determine the direction or should I just insert it without bothering the direction? Thanks.
Posted on: 31 August 2003 by joe90
Hmmmmm....
Tough one that one. It will be hard to tell, but if you've got a good ear you can hear the difference. The right way round will sound cleaner and time better. The wrong way round will sound harder and flatter.
If it's really old (ie over 5 years or so), and can afford it, replace it with fresh produce.
Joe90
Tough one that one. It will be hard to tell, but if you've got a good ear you can hear the difference. The right way round will sound cleaner and time better. The wrong way round will sound harder and flatter.
If it's really old (ie over 5 years or so), and can afford it, replace it with fresh produce.
Joe90
Posted on: 01 September 2003 by garyi
I have never heard even the remotest difference when cables are the 'wrong' way round. Moreover I can't think of any good reason why it should.
When I plug cables in I make sure they go in the right holes and nothing more. However make sure they are in phase of course.
When I plug cables in I make sure they go in the right holes and nothing more. However make sure they are in phase of course.
Posted on: 01 September 2003 by AndyMac
On mine the "n" of naim is towards the amp.
Andy
Andy
Posted on: 01 September 2003 by ARC
I though that the signal travels in the direction of writing i.e N towards the amp.
Brendan
Brendan
Posted on: 01 September 2003 by garyi
ARC the company line is as follows.
On the interconnect leads including snaics the end with a plastic band and text must point towards source, so from the power amp the plastic end would go into the power supply or pre, and then from the pre the plastic end would go into the CDP.
The speaker wire however should travel in the direction to the speaker.
On the interconnect leads including snaics the end with a plastic band and text must point towards source, so from the power amp the plastic end would go into the power supply or pre, and then from the pre the plastic end would go into the CDP.
The speaker wire however should travel in the direction to the speaker.
Posted on: 02 September 2003 by Arye_Gur
JV said that the direction of the cable makes difference, and although Naim tried, they didn't find out why.
He thought that the process of attaching the isolation to the wire, which is a very hot process, causes the cable to be directional sensitive.
Arye
He thought that the process of attaching the isolation to the wire, which is a very hot process, causes the cable to be directional sensitive.
Arye
Posted on: 02 September 2003 by garyi
Yea, but common Arye thats tenous to say the least.
Still if JV said so it must be true
Still if JV said so it must be true
Posted on: 02 September 2003 by Arye_Gur
garyi,
You say
I'd argued endless times about the question of the conflict between people testimony about how they do hear things and about how it don't feet the science.
I told here about a year ago, that I heard a lecture from a professor of physics of the University of Tel Aviv about the connection between music and physics.
He said, in an official lecture of the University, that we don't know everything about the structure of our ear, and we know nothing about Psycho Physics and that's why there are many things we can't explain about our hearing system and about the connection between physics and how we hear.
I was surprised as so many engineers in the Israeli forum are convinced to death that the physics they know is so absolute - that they can't listen to someone who describes anything that's seems to be "not physically" to them.
I called professor Katzir and he told me that it seems to be true that there are phenomenon that stereo manufacturers describe and no one can explain how do they happen.
I think that it is trustable when a person like JV says that there is a phenomenon that happens but we don't know why.
Arye
You say
quote:
Still if JV said so it must be true
I'd argued endless times about the question of the conflict between people testimony about how they do hear things and about how it don't feet the science.
I told here about a year ago, that I heard a lecture from a professor of physics of the University of Tel Aviv about the connection between music and physics.
He said, in an official lecture of the University, that we don't know everything about the structure of our ear, and we know nothing about Psycho Physics and that's why there are many things we can't explain about our hearing system and about the connection between physics and how we hear.
I was surprised as so many engineers in the Israeli forum are convinced to death that the physics they know is so absolute - that they can't listen to someone who describes anything that's seems to be "not physically" to them.
I called professor Katzir and he told me that it seems to be true that there are phenomenon that stereo manufacturers describe and no one can explain how do they happen.
I think that it is trustable when a person like JV says that there is a phenomenon that happens but we don't know why.
Arye
Posted on: 02 September 2003 by woody
quote:
Originally posted by kinetic:
The NACA5 was taken out from the amp and speakers terminals, moved and now I'm not sure which end to which (on the rush of moment, forget to do markings on it). And couldn't find any arrows on the cables. Anyone please help if it's possible to determine the direction or should I just insert it without bothering the direction? Thanks.
err...mine (white) has arrows. Looks like:
naim audio ----->
The arrow points towards the speaker.
- woody
Posted on: 05 September 2003 by long-time-dead
Just to add to the confusion, I remotely remember that a reason given to the directionality of cable was the way that the metal is drawn to the correct diameter. The impression that I got was that the drawing process creates a directional micro-funnel of molecules
I cannot explain any of the physics or psycho-bable but just wanted to share my memories.
Like everything - put the cables in, listen and then turn them round and listen again. Choose the way it works best for you and enjoy the music !!!
I cannot explain any of the physics or psycho-bable but just wanted to share my memories.
Like everything - put the cables in, listen and then turn them round and listen again. Choose the way it works best for you and enjoy the music !!!
Posted on: 05 September 2003 by NaimDropper
I say pick your favorite direction and go for it. My cables are run through plastic conduit in the walls, it is nearly impossible for me to get it out without destroying it, so I can't experiment.
Since the signals going to the speaker are alternating, i.e. electricity is being pushed and pulled from the speakers, it seems unlikely that there would be a difference in direction on a cable that is, for all practical (and what about this activity is "practical" anyway...) purposes is EXACTLY the same on both ends.
There are cables designed for communication systems that have different ends or impedance tapering for reasons of impedance matching source and load. There appears to be no attempt at this in audio, and there is no "reason" that I can think of to do it on speakers.
Naim seems to be right most of the time, so I installed my wire "correctly" the first time.
Just follow their directions and convince yourself there is no better way... And there probably isn't!
David
Since the signals going to the speaker are alternating, i.e. electricity is being pushed and pulled from the speakers, it seems unlikely that there would be a difference in direction on a cable that is, for all practical (and what about this activity is "practical" anyway...) purposes is EXACTLY the same on both ends.
There are cables designed for communication systems that have different ends or impedance tapering for reasons of impedance matching source and load. There appears to be no attempt at this in audio, and there is no "reason" that I can think of to do it on speakers.
Naim seems to be right most of the time, so I installed my wire "correctly" the first time.
Just follow their directions and convince yourself there is no better way... And there probably isn't!
David
Posted on: 05 September 2003 by Martin Payne
quote:
Originally posted by Arye_Gur:
He thought that the process of attaching the isolation to the wire, which is a very hot process, causes the cable to be directional sensitive.
Arye,
your memory is good.
quote:
Date: 17-Apr-99 05:33
Author: julian vereker
Subject: direction
Here follows a cut & paste from an earlier post of mine.
"I can't tell you why cables sound different one way round to the other, but I do know when the 'directionality' happens in manufacture.
"It doesn't seem to matter how the bundle (of copper) is drawn, single direction or mixed direction, but as soon as the insulation is extruded onto the bundle, the directionality is established. This means that one can mark the insulation and it will always be the right way round.
"I suspect that the hot plastic insulation anneals the copper in some way, and this affects the crystaline structure.
"But all our attempts, over many years, have failed to find any measurement to show the directionality or indeed whether one cable will sound better than another (other than the obvious - resistance, capacitance and inductance)
"Maybe someone out there knows?"
I am not sure about being an ex Physicist, I would have thought 'Once a Physicist always a Physicist'. However one thing that is often missed by the 'profesionals' is that audio electronics design is the most difficult discipline of all - one has to design for 10 octaves and 130dB at the same time - a huge envelope, and much larger than any other area of electronics endeavor.
julian
cheers, Martin
E-mail:- MartinPayne at Dial.Pipex.com