RE: Speaker Wiring

[Keith Doxey <ukha@xxxxxxxxxxx>]

Quoting Ian Davidson <ian@xxxxxxx>:

> Hi Rob
>
> Two 8 Ohm speakers when wired in Parallel will be 4 Ohms.
>
> Two 8 Ohm speakers when wired in series will be 16 Ohms.
>
> For more than 2 speakers in series then just keep adding.
> For more than 2 speakers in parallel then use the equation Tony gave
> you!
>


If all the parallel connected speakers are the same impedance then you can
just
divide by the number of speakers. eg four 8ohm speakers in parallel =
8/4=2ohms
... you can still use the formula if you want.

1/(1/8+1/8+1/8+1/8)

= 1/(0.125+0.125+0.125+0.125)
= 1/0.5
=2

Same result.... just takes longer and my shortcut ONLY works if all
speakers are
the same impedance.

Putting them in series is perfectly safe but as you increase the impedance
the
amplifier outputs less power.

If you want to add multiple sets of speakers then use a mixture of series
parallel.

eg. 4 sets - wire 2 sets in series - wire another 2 sets in series -
connect the
two series connected sets in parallel.

----8ohm-------8ohm-----
------                        ------
----8ohm-------8ohm-----

is effectively

----16ohm-----
------              ------
----16ohm-----

is effectively


-----------8ohm-------------


HTH

Keith

www.diyha.co.uk
www.kat5.tv