View Single Post
  #25 (permalink)  
Old July 24th 03, 06:43 PM posted to uk.rec.audio
Keith G
external usenet poster
 
Posts: 7,388
Default Hello valve lovers, wherever you are.

"Stewart Pinkerton" wrote in message
...
On Thu, 24 Jul 2003 14:57:41 +0100, "Keith G"
wrote:

Tell me if this will work: The amp has two sets of speaker outlets (A and

B)
which I have used to check the 'biwiring' phenomenon (to absolutely

'zero'
effect, I would say, yet again). If I use two pairs of (identical)

speaker
wires to the speakers and leave the connecting links on the speaker
terminals will I be able to select A and B in turn (ie to compare the

'with'
and 'without' resistors in series) or will the impedances be somehow

'messed
up'? (It would be a simple front-panel button pressing exercise if this

is
permissible....)


That should work, but it will also work if you just use the one cable,
and link the resistors between the A and B output terminals. This
reduvces the number of variables to just the resistor.



OK, this sounds neat and 'elegant' - better than wires running everywhere.

Correct me if I'm not getting this right - connect a cable like the letter
'h' where the speakers are off to the top and terminal A is the 'left foot'
and terminal B is the 'right foot' of the 'h'. The resistor (I have managed
to get a couple of R47Js rated at 4W - I take it these will be OK?) is then
chopped into the 'loop' between A and B.

Now, assuming I've got that right, selecting A will be equal to the cable
without the resistor and selecting B will include the resistor, yes? Will
that work OK and the fact that both A and B connections exist (but not
simultaneously selected, of course) throughout not 'muddy the waters' at
all? The geezer I got the resistors from went over my head with summat about
the amp being wired 'in series' internally?????

Off out for a while, will be playing with this later - listen out for the
'bang'........

:-)