Where did I go wrong?

[Guest]

Archived from groups: rec.audio.high-end (More info?)

Over the weekend I added some damping material called Vibrastop which
was mostly used in aviation industry to damp the circuit board and
transport in my player. Most of damping done by remounting the circuit
board by inserting some material between the chassis and the board.
None of the materials were closer than 1 cm to the circuits itself.
The board's edge itself was surrounded by the material giving a solid
"thud" sound when knocked. Previously a light knock would give out a
rattling sound.

Result of listening test.

The sound became more scaterred ( read separated) between instruments,
Sound lacking bite ( read smooth), But i love the bass. Sharp, deep
and sometimes longer, or maybe I am mixing with deep and longer but I
think the timing is more precise. One thing is obvious, various
instruments heard more clearly and telling several voices became more
apparent.

Now the only problem is I do not know whether it is an improvement.
Fatigue factor almost nil but I would also find that the sound was
like re-recorded with remixing done at increasing the level of all
instrument to be even. BUT, it is different, and I do not like them.
The vocal is much lower and the harshness is no longer there. The
voice used to sound with a slight breaks or brittle previously but now
it is more distanced and smooth (read flat) .

All these simply because a little damping? Or is it because I am used
to an inferior sound for it has been almost two years since any major
change to my equipment? Or am I so confused that I do not know what is
good sound ? To be fair to myself I have not made any comparison with
other high end product to compare. I want to listen for a month or so
and then remove the damping to revaluate again.

Right now, I am just listening to my equipment and comparing it before
and after damping. After all, damping should improve the sound right?.
Or did the manufacturer already had taken in consideration of the
microphonic of the circuit board in the design and any extra damping
affects the sound negatively?

Awaitng for your esteemed comments.

 

[Guest]

Archived from groups: rec.audio.high-end (More info?)

TChelvam wrote:
> Over the weekend I added some damping material called Vibrastop which
> was mostly used in aviation industry to damp the circuit board and
> transport in my player. Most of damping done by remounting the circuit
> board by inserting some material between the chassis and the board.
> None of the materials were closer than 1 cm to the circuits itself.
> The board's edge itself was surrounded by the material giving a solid
> "thud" sound when knocked. Previously a light knock would give out a
> rattling sound.
>
> Result of listening test.
>
> The sound became more scaterred ( read separated) between instruments,
> Sound lacking bite ( read smooth), But i love the bass. Sharp, deep
> and sometimes longer, or maybe I am mixing with deep and longer but I
> think the timing is more precise. One thing is obvious, various
> instruments heard more clearly and telling several voices became more
> apparent.
>
> Now the only problem is I do not know whether it is an improvement.
> Fatigue factor almost nil but I would also find that the sound was
> like re-recorded with remixing done at increasing the level of all
> instrument to be even. BUT, it is different, and I do not like them.
> The vocal is much lower and the harshness is no longer there. The
> voice used to sound with a slight breaks or brittle previously but now
> it is more distanced and smooth (read flat) .
>
> All these simply because a little damping? Or is it because I am used
> to an inferior sound for it has been almost two years since any major
> change to my equipment? Or am I so confused that I do not know what is
> good sound ? To be fair to myself I have not made any comparison with
> other high end product to compare. I want to listen for a month or so
> and then remove the damping to revaluate again.
>
> Right now, I am just listening to my equipment and comparing it before
> and after damping. After all, damping should improve the sound right?.
> Or did the manufacturer already had taken in consideration of the
> microphonic of the circuit board in the design and any extra damping
> affects the sound negatively?
>
> Awaitng for your esteemed comments.
===============================================

Maybe you didn't go wrong. Don't judge on the basis of only a short
listen. As you say, "listen for a month or so and then remove the
damping to revaluate again."

-GP

 

[Guest]

Archived from groups: rec.audio.high-end (More info?)

In article <c97ia7026lo@news3.newsguy.com>,
tchelvam@hotmail.com (TChelvam) wrote:

> All these simply because a little damping?

No, because you think damping should have an effect.

> Or is it because I am used
> to an inferior sound for it has been almost two years since any major
> change to my equipment? Or am I so confused that I do not know what is
> good sound ? To be fair to myself I have not made any comparison with
> other high end product to compare. I want to listen for a month or so
> and then remove the damping to revaluate again.
>
> Right now, I am just listening to my equipment and comparing it before
> and after damping. After all, damping should improve the sound right?.

Nope. It shouldn't do anything at all to the sound.

> Or did the manufacturer already had taken in consideration of the
> microphonic of the circuit board in the design and any extra damping
> affects the sound negatively?

The possible microphonic effects are so tiny that for all practical
purposes they do not exist. I'm afraid that damping a CD player is a
waste of time. (Unless it vibrates so badly that you can hear the
player over quiet passages, in which case you should just toss the
player and buy a better one.)

--
Tim

 

[ban]

Archived from groups: rec.audio.high-end (More info?)

TChelvam wrote:
> Over the weekend I added some damping material called Vibrastop which
> was mostly used in aviation industry to damp the circuit board and
> transport in my player. Most of damping done by remounting the circuit
> board by inserting some material between the chassis and the board.
> None of the materials were closer than 1 cm to the circuits itself.
> The board's edge itself was surrounded by the material giving a solid
> "thud" sound when knocked. Previously a light knock would give out a
> rattling sound.
>
> Result of listening test.
>
> The sound became more scaterred ( read separated) between instruments,
> Sound lacking bite ( read smooth), But i love the bass. Sharp, deep
> and sometimes longer, or maybe I am mixing with deep and longer but I
> think the timing is more precise. One thing is obvious, various
> instruments heard more clearly and telling several voices became more
> apparent.
>
> Now the only problem is I do not know whether it is an improvement.
> Fatigue factor almost nil but I would also find that the sound was
> like re-recorded with remixing done at increasing the level of all
> instrument to be even. BUT, it is different, and I do not like them.
> The vocal is much lower and the harshness is no longer there. The
> voice used to sound with a slight breaks or brittle previously but now
> it is more distanced and smooth (read flat) .
>
> All these simply because a little damping? Or is it because I am used
> to an inferior sound for it has been almost two years since any major
> change to my equipment? Or am I so confused that I do not know what is
> good sound ? To be fair to myself I have not made any comparison with
> other high end product to compare. I want to listen for a month or so
> and then remove the damping to revaluate again.
>
> Right now, I am just listening to my equipment and comparing it before
> and after damping. After all, damping should improve the sound right?.
> Or did the manufacturer already had taken in consideration of the
> microphonic of the circuit board in the design and any extra damping
> affects the sound negatively?
>
> Awaitng for your esteemed comments.

Well,
I'm sorry, but this sounds like one of the descriptions of expensive cable
manufacturers. And there is the same probability of sound differences. It is
also somehow significant of how the human mind will make up an evaluation.
We believe in the analog world, but the signal of the player is digital. And
digital is a go/no-go affair. We know this from old CD-players. They don't
gradually degrade, but suddenly they refuse to play or start jumping or
muting the sound. We try to clean the lens, but it won't make a difference,
and we buy a new player.
When Scarpitti was describing the benefits of the green pen, he used the
same vocabulary(I first thought it was a parody). As if reflections or
vibrations directly influence the analog output, but there are only digital
words passing, with no correlation to the final analog output.
So everything you describe is 100% a product of your imagination, the second
convincing argument would be : "Even the wife heard it from the kitchen".

So with your tweaks you might even damage your electronics, apart from
throwing away the guarantee. These little plastic parts are wimpy and break
easily. And there might come up unexpected problems due to the additional
thermic isulation, which can rise the temperature of your electronics and
degrade reliability.
--
ciao Ban
Bordighera, Italy

 

[Guest]

Archived from groups: rec.audio.high-end (More info?)

"TChelvam" <tchelvam@hotmail.com> wrote in message
news:c97ia7026lo@news3.newsguy.com...
> Over the weekend I added some damping material called Vibrastop which
> was mostly used in aviation industry to damp the circuit board and
> transport in my player. <snip>

For what it's worth, I tried damping the tray on my Denon CD player (which
is quite solid anyway) with pieces of bitumen damping pad and it definitely
sounded worse.

Stephen

 

[Guest]

Archived from groups: rec.audio.high-end (More info?)

On 5/29/04 9:18 AM, in article c9a2i80p62@news4.newsguy.com, "Ban"
<bansuri@web.de> wrote:

> TChelvam wrote:
>> Over the weekend I added some damping material called Vibrastop which
>> was mostly used in aviation industry to damp the circuit board and
>> transport in my player. Most of damping done by remounting the circuit
>> board by inserting some material between the chassis and the board.
>> None of the materials were closer than 1 cm to the circuits itself.
>> The board's edge itself was surrounded by the material giving a solid
>> "thud" sound when knocked. Previously a light knock would give out a
>> rattling sound.
>>
>> Result of listening test.
>>
>> The sound became more scaterred ( read separated) between instruments,
>> Sound lacking bite ( read smooth), But i love the bass. Sharp, deep
>> and sometimes longer, or maybe I am mixing with deep and longer but I
>> think the timing is more precise. One thing is obvious, various
>> instruments heard more clearly and telling several voices became more
>> apparent.
>>
>> Now the only problem is I do not know whether it is an improvement.
>> Fatigue factor almost nil but I would also find that the sound was
>> like re-recorded with remixing done at increasing the level of all
>> instrument to be even. BUT, it is different, and I do not like them.
>> The vocal is much lower and the harshness is no longer there. The
>> voice used to sound with a slight breaks or brittle previously but now
>> it is more distanced and smooth (read flat) .
>>
>> All these simply because a little damping? Or is it because I am used
>> to an inferior sound for it has been almost two years since any major
>> change to my equipment? Or am I so confused that I do not know what is
>> good sound ? To be fair to myself I have not made any comparison with
>> other high end product to compare. I want to listen for a month or so
>> and then remove the damping to revaluate again.
>>
>> Right now, I am just listening to my equipment and comparing it before
>> and after damping. After all, damping should improve the sound right?.
>> Or did the manufacturer already had taken in consideration of the
>> microphonic of the circuit board in the design and any extra damping
>> affects the sound negatively?
>>
>> Awaitng for your esteemed comments.
>
> [stuff deleted about how it was all in his imagination]

I have found it productive instead of declaring that something is in his
imagination - it might be good to figure out what *could* cause improvement
in sound by disassembling and reassembling the player in the manner
described.

Some things leap to my mind -

He might have inadvertantly cleaned some inner contacts that had gotten
dirty:

Analog: It would sound better if there were any non soldered connections
that has some dirt or oxidation -

Digital - cleaning: He might have improved the BER of the D to A with the -
which will cause some degradation on the sharp edge before it would lose the
signal (like some of the digital phones - though the digital phones have an
even sharper edge than CD coding).

Cable routing: Due to the limited amount of shielding in most CD players -
he may have moved a cable away from an area that was causing interference
(EMI) or moved it to an area with some EMI.

I would agree that it is hard to imagine that the chnaged described would
have the effect he was talking about - I just find it hard to be dismissive
of observation - and instead of saying how someone is wrong - it is
sometimes useful to figure out how the person might be right....

 

[Guest]

Archived from groups: rec.audio.high-end (More info?)

"Ban" <bansuri@web.de> wrote in message news:c9a2i80p62@news4.newsguy.com...
> Well,
> I'm sorry, but this sounds like one of the descriptions of expensive cable
> manufacturers. And there is the same probability of sound differences. It
is
> also somehow significant of how the human mind will make up an evaluation.
> We believe in the analog world, but the signal of the player is digital.
And
> digital is a go/no-go affair...................

I would like to say that I agree with you. It happened to me when I bi-wire
my speakers wrongly but I was convinced for a long time that I heard
improvement. But having said that I am not going to deny all expensive
players do not make a difference.

 

[Guest]

Archived from groups: rec.audio.high-end (More info?)

"TChelvam" <tchelvam@hotmail.com> wrote in message
news:c97ia7026lo@news3.newsguy.com...
> Over the weekend I added some damping material called Vibrastop which
> was mostly used in aviation industry to damp the circuit board and
> transport in my player.

<snip mag rag prose>

The only way to dampen cd player mechanics
is to use horse feathers.

Sprinkle liberly over cd & transport.
A tube (valve(uk)) could also be stuck, using super glue, on
the output of left & right sockets, to give that
WW2 feeling.

Seriously (lol) though you are trolling.

The way cd's work make the transport & indirectly
the electronics free from vibration effects.

Cushions should be placed for best effect
on the listener

 

[Guest]

Archived from groups: rec.audio.high-end (More info?)

"Bromo" <bromo@ix.netcom.com> wrote in message
news:0L3uc.9311$IB.4903@attbi_s04...

>
> I have found it productive instead of declaring that something is in his
> imagination - it might be good to figure out what *could* cause
improvement
> in sound by disassembling and reassembling the player in the manner
> described.
>

No - He added something.
What you say is true in that disconnecting things
and reconnecting can repair inherent build defects.

He is not saying that. He says that what he added
changed the sound.

Different arguement, different ball game.

 

[Guest]

Archived from groups: rec.audio.high-end (More info?)

On 5/29/04 3:04 PM, in article c9amrh0ak0@news3.newsguy.com, "Rab Smith"
<rabsmith@blueyonder.co.uk> wrote:

>
> No - He added something.
> What you say is true in that disconnecting things
> and reconnecting can repair inherent build defects.
>
> He is not saying that. He says that what he added
> changed the sound.
>
> Different arguement, different ball game.

IN this case - he may have done all that - and did experience better sound -
was just trying to say that he may have heard correctly - but not for the
reasons he thought.

 

[Guest]

Archived from groups: rec.audio.high-end (More info?)

"Rab Smith" <rabsmith@blueyonder.co.uk> wrote in message
news:c9amou0aho@news3.newsguy.com...

> The only way to dampen cd player mechanics
> is to use horse feathers.
>
> Sprinkle liberly over cd & transport.
> A tube (valve(uk)) could also be stuck, using super glue, on
> the output of left & right sockets, to give that
> WW2 feeling.
>
> Seriously (lol) though you are trolling.
>
> The way cd's work make the transport & indirectly
> the electronics free from vibration effects.
>
> Cushions should be placed for best effect
> on the listener
>

The last time I wrote something like these it was politely rejected by our
moderator. Nevermind that.

So you are telling damping, a solid chassis or better casing and all the
other extra compartments got nothing to do with sound?

I wonder whether one High End designer who is selling cotton or wool felt
damper for the circuit board for his amplifer misleading us?

> The way cd's work make the transport & indirectly
> the electronics free from vibration effects

As Stephen pointed out damping the tray did not improve the sound. Actualy I
think it shouldn't even have any effect. Once the CD is inside it is held
suspended by clamping.

Maybe that's why some transport boast that their using ruby bearing or
something like that for their transport to reduce vibration from the
spinning motor.

I have tried many tweaks just for the fun of it. Mostly i believe the so
called effects are imaginary. But some actually works and latest tweak is
one which I am trying to tell the diff btw real and imaginary.

Cheers.

 

[Guest]

Archived from groups: rec.audio.high-end (More info?)

> I wonder whether one High End designer who is selling cotton or wool felt
> damper for the circuit board for his amplifer misleading us?

Ya think?
>
> > The way cd's work make the transport & indirectly
> > the electronics free from vibration effects
>
> As Stephen pointed out damping the tray did not improve the sound. Actualy
I
> think it shouldn't even have any effect. Once the CD is inside it is held
> suspended by clamping.
>
> Maybe that's why some transport boast that their using ruby bearing or
> something like that for their transport to reduce vibration from the
> spinning motor.

I have been lurking this ng for about two weeks, it is a refreshing look at
real world audio reproduction. You people seem to separate the wheat from
the chaff, and I really enjoy reading.

Scrape, scrape, (that's the soap box being positioned) <grin>

You know, if we had multi-terabyte RAM packs that the music was stored in,
nothing moved, rotated, flexed, swayed or vibrated, there would be some
unscrupulous SOBs out there trying to tell us the special foam pad he
conjured up would make our RAMPAC 7000 Music Storage Device sound sooooo
much better, and improve the "air" around the instruments as well.

I hate to say it, but if you have the money and the lack of sense to piss it
away, go for it. Personally, the day I spend more than 5 or 10 bucks for an
interconnect cable, or more than 30 cents a foot for speaker cable, that
will be the day they take me drooling to the nursing home. One thing that
WILL make a difference in your system, take the whole interconnet system
apart about every six months, and clean all the plugs and jacks, speaker
cable ends and connectors. Put it all back together, I'll bet you'll hear
better sound -AND- it won't cost anything but a little of your time.

just .03 worth, kicked it up a penny,
Tom

 

[chung]

Archived from groups: rec.audio.high-end (More info?)

Chelvam wrote:
> "Rab Smith" <rabsmith@blueyonder.co.uk> wrote in message
> news:c9amou0aho@news3.newsguy.com...
>
>> The only way to dampen cd player mechanics
>> is to use horse feathers.
>>
>> Sprinkle liberly over cd & transport.
>> A tube (valve(uk)) could also be stuck, using super glue, on
>> the output of left & right sockets, to give that
>> WW2 feeling.
>>
>> Seriously (lol) though you are trolling.
>>
>> The way cd's work make the transport & indirectly
>> the electronics free from vibration effects.
>>
>> Cushions should be placed for best effect
>> on the listener
>>
>
> The last time I wrote something like these it was politely rejected by our
> moderator. Nevermind that.
>
> So you are telling damping, a solid chassis or better casing and all the
> other extra compartments got nothing to do with sound?

A better designed chassis can result in lower operating temp, as well as
better grounding. But better does not necessarily mean more weight, or
higher cost.

>
> I wonder whether one High End designer who is selling cotton or wool felt
> damper for the circuit board for his amplifer misleading us?

I can't think of any reason why damping a circuit board in an amp can
possibly change the sound of the amp. What kind of improvements is he
claiming, and does he have any measurements to back those up?

>
>> The way cd's work make the transport & indirectly
>> the electronics free from vibration effects
>
> As Stephen pointed out damping the tray did not improve the sound. Actualy I
> think it shouldn't even have any effect. Once the CD is inside it is held
> suspended by clamping.
>
> Maybe that's why some transport boast that their using ruby bearing or
> something like that for their transport to reduce vibration from the
> spinning motor.
>
> I have tried many tweaks just for the fun of it. Mostly i believe the so
> called effects are imaginary. But some actually works and latest tweak is
> one which I am trying to tell the diff btw real and imaginary.

Can't you remove the damping material and see if the sound changes back?
Make sure you are listening at the same position, at the same level,
from the same discs.

>
> Cheers.
>
>
>
>

 

[Guest]

Archived from groups: rec.audio.high-end (More info?)

On 29 May 2004 13:18:00 GMT, "Ban" <bansuri@web.de> wrote:

>We believe in the analog world, but the signal of the player is digital. And
>digital is a go/no-go affair.

Actually it is not. The moment the signal leaves the DAC, it becomes
analog. Also the rest of the cd player is analog: the transport, the
controller of the lense, the transformer, the circuit board, you name
it. And all those analog elements influence the sound.

Ernesto.

"You don't have to learn science if you don't feel
like it. So you can forget the whole business if
it is too much mental strain, which it usually is."

Richard Feynman

 

[Guest]

Archived from groups: rec.audio.high-end (More info?)

"chung" <chunglau@covad.net> wrote in message
news:Wfsuc.26534$Ly.17558@attbi_s01...and also to what Tom wrote....

> > I wonder whether one High End designer who is selling cotton or wool
felt
> > damper for the circuit board for his amplifer misleading us?

> I can't think of any reason why damping a circuit board in an amp can
> possibly change the sound of the amp. What kind of improvements is he
> claiming, and does he have any measurements to back those up?

Oh yes! You would be surprised to know how many actually could hear the
improvement. See www.altavistaaudio.com and go to the testimonial part.

The other part on "measurements" , I would say physics is not an absolute
science. Perhaps, there is some element that is yet to be discovered by us.
Isn't it only recently scientists discovered the is another force besides
gravity. So maybe, there's is something else that exist but cannot be proven
simply because we do not know the existence of that element. I think the
measurement of inductance, resistance, capacitance developed over along
period of time.

On many occassions ( actaully on all occassions), I can't tell the
difference btw a $200 and $2000 power cord. But I can tell the difference
between a $10 and $200 interconnect. However, my friend who bought and the
guy who sold the cable claim they can tell the diff btw $200 and $2000
cable. I would like to believe them only if they could take the blind test
but they are pretty busy for such childish game. I hope you get my drift.

> Can't you remove the damping material and see if the sound changes back?
> Make sure you are listening at the same position, at the same level,
> from the same discs.

That's the fun part. it is my friend's job to remove all the damping in a
month or so without my knowledge. Hopefully, he didn't pull a fast one by
removing that by now because as of yesterday, I was still hearing the so
called 'improvement'. Otherwise, I have to pay for the foolishness by
donating a free CD/SACD and one week free flow at Cheers equivalent on me.

cheers

 

[Guest]

Archived from groups: rec.audio.high-end (More info?)

On 28 May 2004 14:28:23 GMT, tchelvam@hotmail.com (TChelvam) wrote:

>Over the weekend I added some damping material called Vibrastop which
>was mostly used in aviation industry to damp the circuit board and
>transport in my player. Most of damping done by remounting the circuit
>board by inserting some material between the chassis and the board.
>None of the materials were closer than 1 cm to the circuits itself.

Some people say that damping a cd player, or, for that matter, an
amplifier, does not make any difference to the sound, because it
"cannot" make any difference to the sound as electrons etc are
insensitive to vibration.

This kind of reasoning is invariably presented by persons who have
NEVER done any damping experiments themselves. These persons are also
invariably WRONG, as damping and placement in general ALWAYS makes a
difference. Whether for the better or for worse, is subject to
judgement.

Cables are subject to microphonics, transformers are sensitive to
vibration, as are caps. It is NOT difficult to hear an amplifier
perform differently when placed on a wooden board or on a marmor
plate, or on sorbothane rubbers, or on whatever you have at hand.

The many heard argument that you hear a difference because you pay a
lot of money for high end contraptions, doesn't hold water, because
the wooden board or the old marmor plate or the street bricks or
whatever are not expensive at all: generally they are free to collect
from this or that spot.

So when it comes to damping, many persons use sorbothane pods or
rubbers under their machines or inside. My experience with sorbothane
is contrary to the positive experience of most people: I put it under
the transformer of my pre amp once and didn't like the result at all.
There was a kind of freq shift, introducing a kind of slissing high
and all things happening to the basses. It was a very manufactured and
unnatural sound. I had the same experience a year before with
sorbothane feet under my cd player.

My experience is that amps (both transistor and tube) and cd players
need a kind of breathing space to keep the sound open, so damping many
times doesn't do much good. However, I do use cheap rubber feet of a
special type under my cd player and amps (20 euro for four), because
it turned out that they work well with my equipment. All the other
damping material that I have tried over the years, I have always
removed before long. The same with cones or spikes (hard sound).

Ernesto

"You don't have to learn science if you don't feel
like it. So you can forget the whole business if
it is too much mental strain, which it usually is."

Richard Feynman

 

[Guest]

Archived from groups: rec.audio.high-end (More info?)

On 29 May 2004 15:13:41 GMT, "Stephen McLuckie"
<stephen.mcluckie@ntlworld.com> wrote:

>For what it's worth, I tried damping the tray on my Denon CD player (which
>is quite solid anyway) with pieces of bitumen damping pad and it definitely
>sounded worse.
>
>Stephen

For me the same.

Ernesto

"You don't have to learn science if you don't feel
like it. So you can forget the whole business if
it is too much mental strain, which it usually is."

Richard Feynman

 

[chung]

Archived from groups: rec.audio.high-end (More info?)

Chelvam wrote:

> "chung" <chunglau@covad.net> wrote in message
> news:Wfsuc.26534$Ly.17558@attbi_s01...and also to what Tom wrote....
>
>> > I wonder whether one High End designer who is selling cotton or wool
> felt
>> > damper for the circuit board for his amplifer misleading us?
>
>> I can't think of any reason why damping a circuit board in an amp can
>> possibly change the sound of the amp. What kind of improvements is he
>> claiming, and does he have any measurements to back those up?
>
> Oh yes! You would be surprised to know how many actually could hear the
> improvement. See www.altavistaaudio.com and go to the testimonial part.

I am not surprised at all to see many testimonials on its website. Since
they don't provide any technical reasons or measurements, testimonials
would be their strongest marketing tool.

>
> The other part on "measurements" , I would say physics is not an absolute
> science. Perhaps, there is some element that is yet to be discovered by us.
> Isn't it only recently scientists discovered the is another force besides
> gravity. So maybe, there's is something else that exist but cannot be proven
> simply because we do not know the existence of that element. I think the
> measurement of inductance, resistance, capacitance developed over along
> period of time.

Yeah, but would you trust a tweak if the guy making the tweak can't
quantify what he has changed? Do you believe the amazing, day and night
differences claimed in those testimonials do not show up in measurements?

>
> On many occassions ( actaully on all occassions), I can't tell the
> difference btw a $200 and $2000 power cord.

So there you go. I'm sure there are many, many testimonials from people
able to hear those differences.

 

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Archived from groups: rec.audio.high-end (More info?)

On Mon, 31 May 2004 16:19:35 GMT, "Chelvam" <chelvam@myjaring.net>
wrote:

>"chung" <chunglau@covad.net> wrote in message
>news:Wfsuc.26534$Ly.17558@attbi_s01...and also to what Tom wrote....
>
>> > I wonder whether one High End designer who is selling cotton or wool
>felt
>> > damper for the circuit board for his amplifer misleading us?
>
>> I can't think of any reason why damping a circuit board in an amp can
>> possibly change the sound of the amp. What kind of improvements is he
>> claiming, and does he have any measurements to back those up?
>
>Oh yes! You would be surprised to know how many actually could hear the
>improvement. See www.altavistaaudio.com and go to the testimonial part.

That would be people who *claim* to hear a difference - not the same
thing at all!

>The other part on "measurements" , I would say physics is not an absolute
>science.

You'll injure yourself, sidestepping that far...............

>Perhaps, there is some element that is yet to be discovered by us.
>Isn't it only recently scientists discovered the is another force besides
>gravity. So maybe, there's is something else that exist but cannot be proven
>simply because we do not know the existence of that element. I think the
>measurement of inductance, resistance, capacitance developed over along
>period of time.

Actually, it developed over a very short period of time, and we don't
need any new scientific discoveries to take two otherwise identical
amps, one orifginal and one 'tweaked', and see if anyone can tell the
difference under level-matched double-blind conditions. Now, if these
mods really worked, that would be the best possible evidence that the
designer could use to promote the product. Now, do you see one single
solitary example of this being done? No? Ever wonder why?

>On many occassions ( actaully on all occassions), I can't tell the
>difference btw a $200 and $2000 power cord. But I can tell the difference
>between a $10 and $200 interconnect.

I bet you $10,000 that you can *not* tell the difference, when you
don't *know* which one is connected.

> However, my friend who bought and the
>guy who sold the cable claim they can tell the diff btw $200 and $2000
>cable. I would like to believe them only if they could take the blind test
>but they are pretty busy for such childish game. I hope you get my drift.

Childish game? The only positive way to know if there really is a
difference - you call a childish game? I think we know who is playing
games here...................

>> Can't you remove the damping material and see if the sound changes back?
>> Make sure you are listening at the same position, at the same level,
>> from the same discs.
>
>That's the fun part. it is my friend's job to remove all the damping in a
>month or so without my knowledge. Hopefully, he didn't pull a fast one by
>removing that by now because as of yesterday, I was still hearing the so
>called 'improvement'. Otherwise, I have to pay for the foolishness by
>donating a free CD/SACD and one week free flow at Cheers equivalent on me.

It's lot simpler than that - just get another, untreated, amplifier
and compare the two.
--

Stewart Pinkerton | Music is Art - Audio is Engineering

 

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Archived from groups: rec.audio.high-end (More info?)

On Mon, 31 May 2004 16:28:44 GMT, ernstr@xs4all.nl (Ernst Raedecker)
wrote:

>On 28 May 2004 14:28:23 GMT, tchelvam@hotmail.com (TChelvam) wrote:
>
>>Over the weekend I added some damping material called Vibrastop which
>>was mostly used in aviation industry to damp the circuit board and
>>transport in my player. Most of damping done by remounting the circuit
>>board by inserting some material between the chassis and the board.
>>None of the materials were closer than 1 cm to the circuits itself.
>
>Some people say that damping a cd player, or, for that matter, an
>amplifier, does not make any difference to the sound, because it
>"cannot" make any difference to the sound as electrons etc are
>insensitive to vibration.
>
>This kind of reasoning is invariably presented by persons who have
>NEVER done any damping experiments themselves.

Wrong.

>These persons are also
>invariably WRONG, as damping and placement in general ALWAYS makes a
>difference.

Wrong.

> Whether for the better or for worse, is subject to
>judgement.

Wromng - it's subject to experimentation to check whether the
'difference' is all in the mind.

>Cables are subject to microphonics, transformers are sensitive to
>vibration, as are caps. It is NOT difficult to hear an amplifier
>perform differently when placed on a wooden board or on a marmor
>plate, or on sorbothane rubbers, or on whatever you have at hand.

Only if the amp is poorly designed. I'll grant that some do exist, but
good emgineering-led manufacturers such as Meridian take care of any
such potential problems in the design stage.

>The many heard argument that you hear a difference because you pay a
>lot of money for high end contraptions, doesn't hold water, because
>the wooden board or the old marmor plate or the street bricks or
>whatever are not expensive at all: generally they are free to collect
>from this or that spot.

Doesn't make any difference to the basic principle that those who put
time, money or effort into something, expect a return.

>So when it comes to damping, many persons use sorbothane pods or
>rubbers under their machines or inside. My experience with sorbothane
>is contrary to the positive experience of most people: I put it under
>the transformer of my pre amp once and didn't like the result at all.
>There was a kind of freq shift, introducing a kind of slissing high
>and all things happening to the basses. It was a very manufactured and
>unnatural sound. I had the same experience a year before with
>sorbothane feet under my cd player.

Horse puckey. That is to say, horse puckey has superior self-damping
to sorbothane, why not try covering the CD player in horse puckey - it
will be equally effective and may improve the general ambience,
releasing a whole new gestalt to the musical performance.

>My experience is that amps (both transistor and tube) and cd players
>need a kind of breathing space to keep the sound open, so damping many
>times doesn't do much good. However, I do use cheap rubber feet of a
>special type under my cd player and amps (20 euro for four), because
>it turned out that they work well with my equipment. All the other
>damping material that I have tried over the years, I have always
>removed before long. The same with cones or spikes (hard sound).

In other words, everything works the same.........
--

Stewart Pinkerton | Music is Art - Audio is Engineering