Audio, hi-fi and car audio

Audio Banter (https://www.audiobanter.co.uk/forum.php)

- uk.rec.audio (General Audio and Hi-Fi) (https://www.audiobanter.co.uk/uk-rec-audio-general-audio/)

- - Power Cords (https://www.audiobanter.co.uk/uk-rec-audio-general-audio/3432-power-cords.html)

wrote in message
ups.com...
Hi,

How important is the quality of power cords in a high end system?

**Not at all.

Does it really make a difference in sound?

**Nope. I prove this regularly to people who are deluded into thinking that
it makes a difference. Follow my logic:

I use an amplifier which has no speaker relay protection systems. Therefore,
when it is unplugged, it can still deliver power to the speakers, for as
long as the main capacitor banks can supply it. The main filter caps total
250,000uF. This means the amplifier can deliver a handful of Watts for
several seconds. Plugging and unplugging the amp from the 240VAC mains
supply is inaudible to all listeners. Therefore, there can never be any
difference between power cords.

--
Trevor Wilson
www.rageaudio.com.au

On Wed, 19 Oct 2005 00:53:38 GMT, Luke Siemaszko
wrote:

wrote:

Hi,

How important is the quality of power cords in a high end system?
Does it really make a difference in sound?

Thanks,

Vasilis

Slightly off topic:

A pro amplifier designer of my acquaintance told me that he hated IEC
power inlets for amplifiers because he had measured up to 7V drop across
them in test.

Anyone else agree / disagree ?

If that ever really happened, the socket would overheat and burn out.
He may be referring to the combination of plug, socket and fuse -
which would make him pretty incompetent.

--

Stewart Pinkerton | Music is Art - Audio is Engineering

Trevor Wilson wrote:
wrote in message
ups.com...

Hi,

How important is the quality of power cords in a high end system?

**Not at all.

Does it really make a difference in sound?

**Nope. I prove this regularly to people who are deluded into thinking that
it makes a difference. Follow my logic:

I use an amplifier which has no speaker relay protection systems. Therefore,
when it is unplugged, it can still deliver power to the speakers, for as
long as the main capacitor banks can supply it. The main filter caps total
250,000uF. This means the amplifier can deliver a handful of Watts for
several seconds. Plugging and unplugging the amp from the 240VAC mains
supply is inaudible to all listeners. Therefore, there can never be any
difference between power cords.

Ahh, thats because your capacitors are already filled from the corrupted
supply :-)

--
Nick

In article , Richard Wall
wrote:
When you asked the question what answer were you looking for ? This
news group is fully of highly qualified experts who will tell you that
cables make no difference.

....or at least a number of people who have experimented with different
cables and established that they can't hear any signs that they affect the
sound unless the cables or amps have a fault of some kind.

Those who believe differently have ceased to argue.

....and avoid particpating in controlled tests because experience has shown
that those who "believe differently" are unable to substantiate their
"beliefs" when they have to rely only on the actual sounds the systems
produce.

Russ Andrews offers sale or return, claims great things for his cables
and gives reasons why he says they work, he would he sells cables as do
lots of other companies. Would I spend £800 on a mains cable I thought
made the music sound better, no! but I have bought Kimber mains and
heard an improvement.

I recall that back in the 1950s there was someone who used to advertise
'lucky charms' in the back of pulp magazines on a similar trial basis. They
seemed to remain in business...

Some will say this is either just in my mind and
that on a DBT I would not be able to tell the difference or that my
system is flawed and badly designed. Why not try a few cables and let us
know if it made any difference for you ?

I have (more than once) done so over the years. It didn't seem to make the
slightest difference. I couldn't hear any changes, and nor could anyone
else I tried them on. Maybe the problem was that I was using well designed
amplifiers with decent PSUs and cables that were adequate.

FWIW my personal reaction is that if changing the mains cable alters the
sound, I would suspect there was a serious problem with either the amp or
the cables involved.

Slainte,

Jim

--
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Audio Misc http://www.st-and.demon.co.uk/AudioMisc/index.html
Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html

In article , Luke Siemaszko
wrote:

A pro amplifier designer of my acquaintance told me that he hated IEC
power inlets for amplifiers because he had measured up to 7V drop across
them in test.

Anyone else agree / disagree ?

The only time I have ever come across anything like that was when the
socket contained either a fuse or a filter, and the current was high.
Otherwise I would take it as a sign of a (dangerous) fault in the socket.

Slainte,

Jim

--
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Audio Misc http://www.st-and.demon.co.uk/AudioMisc/index.html
Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html

Luke Siemaszko wrote:

A pro amplifier designer of my acquaintance told me that he hated IEC
power inlets for amplifiers because he had measured up to 7V drop across
them in test.

Anyone else agree / disagree ?

I disagree. Let's take a 2kW pro amp as an example. That will be drawing
peaks of close to 13A when run at full power. With a voltage drop of 7V
it will therefore be dissipating 91W. This would make such a small
volume heat up so much that you would get severe burns trying to unplug it.

Of course, you could put hundreds of amps through it to get it to drop
the claimed 7V, but that's not a realistic test for mains use.

--
Mark.
http://tranchant.plus.com/

In article ,
Nick Gorham wrote:
I use an amplifier which has no speaker relay protection systems.
Therefore, when it is unplugged, it can still deliver power to the
speakers, for as long as the main capacitor banks can supply it. The
main filter caps total 250,000uF. This means the amplifier can
deliver a handful of Watts for several seconds. Plugging and
unplugging the amp from the 240VAC mains supply is inaudible to all
listeners. Therefore, there can never be any difference between power
cords.

Ahh, thats because your capacitors are already filled from the corrupted
supply :-)

Thanks for the first good laugh of the day. ;-)

--
*A fine is a tax for doing wrong. A tax is a fine for doing well.

Dave Plowman London SW
To e-mail, change noise into sound.