Re: 2-pin DIN speaker plug - wiring connections??

["tomdubourg" <thomas.dubourg@xxxxxxx>]

Thanks for the help guys - my worries were unfounded!

I'll wire the speakers tonight and watch for the suck or blow! oh er!

Tom



--- In ukha_d@y..., "mikehumberston" <mike@p...> wrote:
> --- In ukha_d@y..., "tomdubourg" <thomas.dubourg@m...>
wrote:
> 
> > Need some help wiring some speakers to an old B&O amplifier.
It 
has 
> > 2-pin din connections - I don't know which is +ve and -ve!
> > 
> > Can you tell me what polarity the flat blade and the round pin
> > connetions are?
> > 
> > Don't want to wreck my nice new ceiling speakers!
> 
> There isn't a +ve and -ve and you won't wreck you speakers by
> connecting the speakers the 'wrong' way round.  The
connection
> between the amp and the speakers carries a voltage which
oscillates
> about zero, not a voltage with a constant polarity.
> 
> The purpose of the different pins on the connectors is so that you
> can connect both speakers in the pair so that they are both in 
phase,
> i.e. if you were to apply a sine wave which is the same on both
> channels then the drive units would be moving in the same
directions
> on the two speakers at the same time, i.e. out together, in 
together.
>     You can also hear when speakers are correctly
wired in phase.  
In
> phase gives a well defined stereo image, i.e. the sine wave signal
> would have a clearly defined position between the two speakers. 
Out
> of phase fails to give a proper stereo image: the position of the
> sine wave signal would be indistinct and diffuse.
> 
> Just make sure that you connect the same amp pin is connected to
the
> same speaker connector on each channel and then do the stereo
image
> check to make sure you have it right.
> 
> Mike



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