No wonder people can't hear the difference...
 

Eeyore wrote:

Rob wrote:

Eeyore wrote:
" wrote:

Yet in a high resolution system, power cables.......can make a
difference.
Compared to wet string maybe.

Otherwise a properly rated power cord willl have ZERO difference.

Have you ANY IDEA how the AC mains gets mangled to produce the DC for an
amplifier ? The possibility of some ultra-linear power cord affecting it
is beyond laughable.

And I DESIGN this stuff btw, so I DO know what I'm talking about. In great
detail.

How do you reconcile this 'no difference' claim with your notion that a
clean plug can affect sound?


I take it you don't mean mains plugs - they can be as grubby as you
like? Your post at midnight above seems to refer to mains and audio.

What would cleaning a dirty plug do to the sound?

Remove potentially rectifying oxides. Also re-tighten the connection, making it
more secure / less electrical resistance.


I was clearing out the last of the accumulated rubbish following a move
the other day, and came across some 'Goldring Magic Contact Cleaning
Fluid' - a bit of a faff involving two liquids and pipe cleaners. In
view of the fact I haven't cleaned a lead since buying it (20 odd years
ago) I might as well use it up - although i'd assume normal contact
cleaner or isopropanol alcohol would be just as good?

Rob

No wonder people can't hear the difference...
 

Phil Allison wrote:
"Rob"
Eeyore wrote:

Not to memntion that changing the lead would 'clean' the contacts in the
process which could easily have an effect.

How do you reconcile this 'no difference' claim with your notion that a
clean plug can affect sound?


** How about you make sure to post UNDER any words you are referring
o - instead of creating a false para- phrased version of your own.


What would cleaning a dirty plug do to the sound?


** Not what was previously written - is it ?

Dickhead.


Potty mouth.

No wonder people can't hear the difference...
 

David Looser wrote:
"Rob" wrote in message
...
How do you reconcile this 'no difference' claim with your notion that a
clean plug can affect sound?

What would cleaning a dirty plug do to the sound?


You are confusing mains power connectors with audio interconnects, it was
the later about which Graham referred to cleaning the plug. Poor contact on
audio interconnects (and on switches carrying audio) can adversely affect
sound quality.


Yes, I gather, thanks.

Rob

No wonder people can't hear the difference...
 

On 2008-07-30, Jim Lesurf wrote:
On 30 Jul, wrote:
In article
,
wrote:
I recently changed the IC's in a Quad 306 power amplifier (TI's to
Burr-Browns) playing through some Quad 988s. My wife (not an
audiophile), walked in the room and immediately asked what had
changed... "it sounded more alive" was her comment.

Comment much as above. It is a common experience that what we hear
'changes' from one situation to another. Afraid that simply isn't a
basis for deciding *why* a 'change' was heard. Far too many other
possible causes or reasons which your simple anecdote fails to deal with.

BTW I just looked at my copy of the 306 diagram. If you are referring to
'IC1' (TLC271) then you might like to note that IIUC its role seems to be
to null the dc offset of the amp. The 2M2 resistor (r33) and 680nF cap (c3)
mean it only really does much around the 1 Hz region and below.

You loudspeakers (and wife) are remarkable if they can hear this. ...

Even if a recording had content in the subsonic frequency range capable
of "fooling" the R33/C3 integrator, the input HPF formed by C2 (100 nF)
and R6 (120 kOhms) has a time constant that is about 125 times smaller.

So that subsonic content would suffer at least 7 octaves worth of
attenuation just in the 306 input stage. That's before even mentioning
Fletcher and Munson.

--
John Phillips

No wonder people can't hear the difference...
 

Have a look at this if you like contentious stuff.

http://www.diyaudio.com/forums/showt...hreadid=111973

I'm not interested in any of this myself, but thought it might appeal
to others who like arguing.

Andy

No wonder people can't hear the difference...
 

Rob wrote:

Eeyore wrote:
Rob wrote:
Eeyore wrote:
" wrote:

Yet in a high resolution system, power cables.......can make a
difference.
Compared to wet string maybe.

Otherwise a properly rated power cord willl have ZERO difference.

Have you ANY IDEA how the AC mains gets mangled to produce the DC for an
amplifier ? The possibility of some ultra-linear power cord affecting it
is beyond laughable.

And I DESIGN this stuff btw, so I DO know what I'm talking about. In great
detail.

How do you reconcile this 'no difference' claim with your notion that a
clean plug can affect sound?

I take it you don't mean mains plugs

You are correct in your interpretation.


- they can be as grubby as you
like? Your post at midnight above seems to refer to mains and audio.

What would cleaning a dirty plug do to the sound?

Remove potentially rectifying oxides. Also re-tighten the connection, making it
more secure / less electrical resistance.


I was clearing out the last of the accumulated rubbish following a move
the other day, and came across some 'Goldring Magic Contact Cleaning
Fluid' - a bit of a faff involving two liquids and pipe cleaners. In
view of the fact I haven't cleaned a lead since buying it (20 odd years
ago) I might as well use it up - although i'd assume normal contact
cleaner or isopropanol alcohol would be just as good?

Isopropyl will remove greases but not much else AFAIK. God only knows what's in
'contact cleaner'. I try and avoid the stuff.

Graham

No wonder people can't hear the difference...
 

Andy Evans wrote:

Have a look at this if you like contentious stuff.

http://www.diyaudio.com/forums/showt...hreadid=111973

I'm not interested in any of this myself, but thought it might appeal
to others who like arguing.

Since loudspealers aren't 8R2 resistors, the different results surprises
me not one jot. Hence the initial assumption is incorrect.

Graham

No wonder people can't hear the difference...
 

Eeyore wrote:

Rob wrote:

Eeyore wrote:
Rob wrote:
Eeyore wrote:
" wrote:

Yet in a high resolution system, power cables.......can make a
difference.
Compared to wet string maybe.

Otherwise a properly rated power cord willl have ZERO difference.

Have you ANY IDEA how the AC mains gets mangled to produce the DC for an
amplifier ? The possibility of some ultra-linear power cord affecting it
is beyond laughable.

And I DESIGN this stuff btw, so I DO know what I'm talking about. In great
detail.
How do you reconcile this 'no difference' claim with your notion that a
clean plug can affect sound?
I take it you don't mean mains plugs

You are correct in your interpretation.


- they can be as grubby as you
like? Your post at midnight above seems to refer to mains and audio.

What would cleaning a dirty plug do to the sound?
Remove potentially rectifying oxides. Also re-tighten the connection, making it
more secure / less electrical resistance.

I was clearing out the last of the accumulated rubbish following a move
the other day, and came across some 'Goldring Magic Contact Cleaning
Fluid' - a bit of a faff involving two liquids and pipe cleaners. In
view of the fact I haven't cleaned a lead since buying it (20 odd years
ago) I might as well use it up - although i'd assume normal contact
cleaner or isopropanol alcohol would be just as good?

Isopropyl will remove greases but not much else AFAIK. God only knows what's in
'contact cleaner'. I try and avoid the stuff.

Graham


So it's an 'oxide remover' that's needed? Then, I suppose it depends on
the oxide, and gold is less likely to oxidise than other things, so it's
more muck removal? I'd guess you use, or would use if forced, Brasso or
somesuch?

No idea what's in the Goldring stuff, or indeed this:

http://www.cybermarket.co.uk/shopscr1655.html

which seems to work on switches, in the sense they don't crackle after
use - although the effect doesn't last forever, which might be related
to why you don't use it.

Anyway, I'll keep a look out.

Rob

No wonder people can't hear the difference...
 

Rob wrote:

Eeyore wrote:
Rob wrote:
Eeyore wrote:
Rob wrote:

What would cleaning a dirty plug do to the sound?
Remove potentially rectifying oxides. Also re-tighten the connection, making it
more secure / less electrical resistance.

I was clearing out the last of the accumulated rubbish following a move
the other day, and came across some 'Goldring Magic Contact Cleaning
Fluid' - a bit of a faff involving two liquids and pipe cleaners. In
view of the fact I haven't cleaned a lead since buying it (20 odd years
ago) I might as well use it up - although i'd assume normal contact
cleaner or isopropanol alcohol would be just as good?

Isopropyl will remove greases but not much else AFAIK. God only knows what's in
'contact cleaner'. I try and avoid the stuff.

So it's an 'oxide remover' that's needed?

And general muck and dust remover. A clean cloth can be very effective.


Then, I suppose it depends on
the oxide, and gold is less likely to oxidise than other things,

I believe gold should not oxidise in normal domestic use. A 'proper' decent thickness
of gold plating that is.


so it's more muck removal? I'd guess you use, or would use if forced, Brasso or
some such?

Used to use Brasso to clean studio patch cords which were once unplated brass.


No idea what's in the Goldring stuff, or indeed this:

http://www.cybermarket.co.uk/shopscr1655.html

which seems to work on switches, in the sense they don't crackle after
use - although the effect doesn't last forever, which might be related
to why you don't use it.

Indeed. Tends to be a temp fix only.

Graham

No wonder people can't hear the difference...
 

Eiron wrote:

This one?
A56AK
http://www.maplin.co.uk/Module.aspx?...34128&doy=28m7

Yup, that's the beast! Was £2 cheaper in store...

--
Squirrel Solutions Ltd Tel: (01453) 845735
http://www.squirrelsolutions.co.uk/ Fax: (01453) 843773

Registered in England: 05877408