Audio, hi-fi and car audio - Biwiring with Nordost

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Biwiring with Nordost

"Eeyore" wrote in message
...

Trevor Wilson wrote:

"Eeyore" wrote in message
Trevor Wilson wrote:
"Laurence Payne" lpayne1NOSPAM@dslDOTpipexDOTcom wrote
wrote:

On a recent trip to the US I bought a set of Nordost Blue Heaven
RevII
speaker cables at a very good price. The only problem I have with
them
is that they are not set up for biwiring. Does anyone have any
experience of changin connectors on Nordost flat cables. At face
value
it should be straight forward but I don't want to start hacking the
cable about until I am sure what the procedure is. It could be a
very
expensive mistake!!

Sell them to an audiophool and use any reasonably sturdy cable for
your speakers. It will sound exactly the same, and you'll have
money
in your pocket.

**Actually, you don't know that. Nordost Blue Heaven cables are very
low
inductance types and may be much more suitable for certain
installations.

And exactly how much inductance is needed to be audible Trevor ?

**Depends on the impedance curve of the speaker and the length of the
cables, of course.

But of course ! All of these factors come into play.

**I'm pleased that we both agree on this point.

But you knew that already. Further and for the record: I
have been involved in at least a dozen installations where cable runs
were
such that low inductance cabling made substantial audible improvements.

Low inductance cabling might perhaps result in a 'better' HF response -
i.e.
more level at HF ( 'crisper' sound ) .

**Pre-zactly.

The idiots who installed the systems (where I was not the primary
installer)
just used the most expensive cable, without bothering to select the
lowest
inductance cable. Dollars do not necessarily equate to better real world
performance.

That much I'm sure isn't in doubt.

So, how much cable inductance do you reckon is enough to drop the HF
audibly ?

**Why did you ask this question? You already know the answer.

--
Trevor Wilson
www.rageaudio.com.au

--
Posted via a free Usenet account from http://www.teranews.com

Biwiring with Nordost

Trevor Wilson wrote:

"Eeyore" wrote in message

So, how much cable inductance do you reckon is enough to drop the HF
audibly ?

**Why did you ask this question? You already know the answer.

I'm trying to reconcile that with typical cable constructions.

Graham

Biwiring with Nordost

Laurence Payne wrote:

"Trevor Wilson" wrote:

**Actually, you don't know that. Nordost Blue Heaven cables are very low
inductance types and may be much more suitable for certain installations.

Can you design a system that cares?

**?

That would be rather silly,
wouldn't it?

**What would be silly? Demanding that users restrict themselves to certain
cable lengths, or high impedance speakers? Or telling them that they may not
use electrostatics? IMO, that would be silly.

Do Quad etc. recommend special low-inductance cables? Or merely warn
about using esoteric cables that might have excessively high
inductance?

It's high capacitance that may upset some amplifiers.

Amplifiers love inductance.

Graham

Biwiring with Nordost

"Eeyore" wrote in message
...

Trevor Wilson wrote:

"Eeyore" wrote in message

So, how much cable inductance do you reckon is enough to drop the HF
audibly ?

**Why did you ask this question? You already know the answer.

I'm trying to reconcile that with typical cable constructions.

**I don't understand. Typical speaker cable is constructed to achieve the
highest inductance of any conceivable type. Well, except very widely spaced
conductors, of course. Nordost, Goertz, Tocord and coax (amongst others) are
designed to minimise inductive problems.

--
Trevor Wilson
www.rageaudio.com.au

--
Posted via a free Usenet account from http://www.teranews.com

Biwiring with Nordost

In article , Eeyore
wrote:

Amplifiers love inductance.

Not so. If the load is predominantly inductive then this increases the
power dissipation in the output devices compared with what would be
dissipated with a resistive load of the same magnitude. Also, it can shift
the IV locus into less safe portions of the SOA.

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

Biwiring with Nordost

On 2007-01-07, Eiron wrote:
... I'm not sure I believe the stated
inductance for such a widely spaced cable. Perhaps they fold it in two
while measuring the inductance. Here it is:

http://www.nordost.com/Cables/speake...lue-heaven.htm

Yes - it's a surprising construction. However although the individual
conductor pairs are very widely spaced (and therefore have high
inductance) it seems there are 36 pairs in parallel.

I haven't estimated the inductance of an individual pair but the parallel
connection of so many probably explains why the quoted inductance finally
drops back to about 2/3 that of ordinary 12-gauge zip cable.

If you really do need low inductance for a difficult loudspeaker load
then the DIY CAT5 cable approach is really quite effective. It does
result in quite a lot of capacitance so it must only be used with a
suitably stable amplifier.

--
John Phillips

Biwiring with Nordost

Jim Lesurf wrote:

In article , Eeyore
wrote:

Amplifiers love inductance.

Not so. If the load is predominantly inductive then this increases the
power dissipation in the output devices compared with what would be
dissipated with a resistive load of the same magnitude. Also, it can shift
the IV locus into less safe portions of the SOA.

I was referring to typical speaker loads as opposed to solenoids or motors aor
whatever.

Graham