In article , Serge Auckland
wrote:


All you are doing with bi or tri wiring is reducing the resistance from
already low values, increasing the capacitance from normally low values
to still low values, and reducing inductance.


If you use the same type/length of cable for 'bi wiring' to each speaker
unit as you did for 'normal wiring' and don't link the cables together at
the speaker end, then the cable resistance, etc, will so far as the
individual speaker units are concerned, be the same as for 'normal wiring'.
If the amp has a minimal source impedance, then each unit will be unaware
of the existence of the 'other cables' and so see the same cable as if it
were connected in the 'normal' manner.

You *will* no longer by shunting this with the impedance of the 'other
speaker units'. But since this is likely to have an impedance which is much
larger than that of the cable and amp, it is questionable if this is of any
significance. However if the cable series resistance and/or amp output
resistance are high, the frequency response may alter in a way that depends
on the input impedances of the sections of the speaker system.

FWIW I did do an analysis of these effects. People can read this and decide
for themselves if they are likely to have any relevance.

To see the analysis, go to the 'Scots Guide' (URL in my sig), use the link
to the 'Analog and Audio' section, scroll down that page, and use the links
to the pages on "An explanation of bi-wiring", etc, to see the analysis and
results. These show that bi wiring can change the frequency response - but
by only a small amount even when using cables of exceptionally high series
resistance. Hence changes in measured behaviour are possible. But are they
audible in any sensible arrangement?... My reaction tends to be that if I
wanted a change in frequency response of a few tenths of a dB I'd move my
head slightly whilst listening. :-)

Above analysis notwithstanding, I've never seen a single report of a series
of listening tests that showed any signs that such effects were audible,
and which were done in a way that gave the results any assessable
reliability.

Any amplifier/'speaker combination for which this makes ANY difference
is only fit to be used as a boat anchor.

Given the series resistances required, the cables involved might be too
light to be a decent anchor. :-) However very long thin cables, and an
amp with loads of metalwork might fit the bill. You might therefore wish to
use a poor valve amp and some bell wire for this application. Odd how heavy
'vacuum' is... ;-

Slainte,

Jim

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Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html