TCI Cobra interconnects against Chord Chameleon
 

Eeyore wrote:
But not as fake as the story exposed from googling "asa russ andrews"

Uh ? The ASA DID demand Russ Andrews remove certain claims.

Oh, err, Opps :-)

I mean't to scribble "the story about the fake as exposed by googling"....

--
Adrian C

TCI Cobra interconnects against Chord Chameleon
 

"David Looser" wrote in message
...
"Dave Plowman (News)" wrote in message
...
In article , Eeyore
wrote:


I was hoping you'd do it for me since it was you who expressed interest.

No I didn't. ;-)

It was me, I'll have a go.


OK, according to that calculator 10m of 2.5sqmm cable will have a loop
resistance of 0.18 ohm, and 6sqmm 0.07 ohm. Into a 4 ohm load that
corresponds to a loss of 0.15dB for the 6sqmm and 0.38dB for the 2.5sqmm.

So if we have a hypothetical speaker with a minimum impedance of 4 ohm the
maximum possible variation from flat caused by this particular effect with
2.5sqmm cable is 0.38dB. This will be far smaller than variations due to the
frequency response of the speaker itself or due to the room, so I'm pretty
happy to declare it negligible.

David.

TCI Cobra interconnects against Chord Chameleon
 

"Dave Plowman (News)" wrote:

Eeyore wrote:
"Dave Plowman (News)" wrote:
Eeyore wrote:
David Looser wrote:

I'd be interested in any evidence that there is any audible
difference in normal domestic use between 6sqmm and 2.5sqmm for
lengths up to 10m.

What does the resistance difference work out to ? Data should be
readily available.

Here's a handy voltage drop calculator which should give you the data
you want - with a bit of maths.

http://www.tlc-direct.co.uk/Technica...ltageDrop.html

I was hoping you'd do it for me since it was you who expressed interest.

No I didn't. ;-)

No ?


It's more than 'volt drops' btw since speakers do not have constant
impedance.

You need to know the R, L and C of cable. It makes a complex filter.

With the output impedance of a decent amp being 2 10ths of FA,

So NOT a valve amp ?


the capacitance of any practical cable doesn't matter. Nor should the
inductance with a properly designed amp. The only thing left - under
normal circumstances, ie likely domestic speaker runs - is the resistance.

I think you need to revise that supposition. R dominates for sure but don't
ignore L and C. You may be surprised.

Active speakers aren't there by accident.

Graham

TCI Cobra interconnects against Chord Chameleon
 

David Looser wrote:

"Dave Plowman wrote
Eeyore wrote

I was hoping you'd do it for me since it was you who expressed interest.

No I didn't. ;-)

It was me, I'll have a go.

It's more than 'volt drops' btw since speakers do not have constant
impedance.

So the "volt drop" will vary with frequency, which will cause an additional
departure from a flat frequency response,

Absolutely RIGHT.

Any long speaker cable + uncompensated speaker load will form a complex filter
with a non-uniform frequency response.

Graham

TCI Cobra interconnects against Chord Chameleon
 

David Looser wrote:

"David Looser" wrote in message
"Dave Plowman (News)" wrote in message

I was hoping you'd do it for me since it was you who expressed interest.

No I didn't. ;-)

It was me, I'll have a go.

OK, according to that calculator 10m of 2.5sqmm cable will have a loop
resistance of 0.18 ohm, and 6sqmm 0.07 ohm. Into a 4 ohm load that
corresponds to a loss of 0.15dB for the 6sqmm and 0.38dB for the 2.5sqmm.

Asssuming constant impedance across the frequency band. NOT very likely.


So if we have a hypothetical speaker with a minimum impedance of 4 ohm the
maximum possible variation from flat caused by this particular effect with
2.5sqmm cable is 0.38dB. This will be far smaller than variations due to the
frequency response of the speaker itself or due to the room, so I'm pretty
happy to declare it negligible.

Oh, for God's sake get a simulation package and see the horrible truth.

The ONLY accurate speakers are actively driven ones.

Graham

TCI Cobra interconnects against Chord Chameleon
 

"Eeyore" wrote in message
...


I think you need to revise that supposition. R dominates for sure but
don't
ignore L and C. You may be surprised.

OK then, suprise us.

Active speakers aren't there by accident.

No, most of them are connected to computers.

David.

TCI Cobra interconnects against Chord Chameleon
 

In article ,
Eeyore wrote:
the capacitance of any practical cable doesn't matter. Nor should the
inductance with a properly designed amp. The only thing left - under
normal circumstances, ie likely domestic speaker runs - is the
resistance.

I think you need to revise that supposition. R dominates for sure but
don't ignore L and C. You may be surprised.

Active speakers aren't there by accident.

Does anyone make a high quality single channel active speaker? All the
ones I know use a multi channel amp to get rid of the passive crossover.
Or, of course, to avoid long speaker runs in a commercial etc installation.

But non I know of to specifically get round problems caused by domestic
speaker runs. Any problems caused by capacitance and inductance are
equally valid at line levels.

--
*Toilet stolen from police station. Cops have nothing to go on.

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

TCI Cobra interconnects against Chord Chameleon
 

David Looser wrote:

"Eeyore" wrote in message
I think you need to revise that supposition. R dominates for sure but
don't ignore L and C. You may be surprised.

OK then, suprise us.

How about YOU DO ? Why do do you expect me to do YOUR work ?


Active speakers aren't there by accident.

No, most of them are connected to computers.

A: ********

B: You're obviously not living in the pro-audio world. Now do you like
'shoot-em-ups' ?

Graham

TCI Cobra interconnects against Chord Chameleon
 

"Dave Plowman (News)" wrote:

Does anyone make a high quality single channel active speaker?

God Yes !

Ans were I not so astonished you asked I'd answer right now !

Graham stunned to hell

TCI Cobra interconnects against Chord Chameleon
 

"Eeyore" wrote in message
...


David Looser wrote:

"Eeyore" wrote in message
I think you need to revise that supposition. R dominates for sure but
don't ignore L and C. You may be surprised.

OK then, suprise us.

How about YOU DO ? Why do do you expect me to do YOUR work ?


I'm not the one claiming that L & C are significant, so it's *your* work.


Active speakers aren't there by accident.

No, most of them are connected to computers.

A: ********

It's not "********" at all. The majority of active speakers are connected to
computers, very few are connected to domestic Hi-Fi systems.

B: You're obviously not living in the pro-audio world.

So there are some active speakers used in pro-audio, the numbers are trivial
compared to those used with computers.

Now do you like
'shoot-em-ups' ?

No, do you?

David.