RE: Whole House Audio 64 ohm speakers

["Keith Doxey" <ukha@xxxxxxx>]

Hi Mick,

Thats exactly what I meant.

Yes the impedance will change but the lowest it will ever get to is 8 ohms.

speakers	impedance

1		64
2		32
3		21.3
4		16
5		12.8
6		10.7
7		9.1
8		8

the problem with 8 ohm speakers is that 2 will bring you down to 4 ohms,
the
minimum for most amps. To connect 4 you would need to put 2 in series with
each other, then the other two in series giving two 16 ohm chains, then put
them in parallel to bring it back down to 8 ohms

------------------------------

AMP               SPK        SPK


SPK        SPK

------------------------------

Solid state amplifiers are perfectly happy with a higher impedance or even
open circuit. Valve amplifiers MUST NEVER be run open circuit as very high
voltages appear on the speaker terminals and flashover occurs inside the
valves. No amplifier should ever be run with a load of a lower impedance
than the rated minimum as it risks destroying the amp.

Keith


> -----Original Message-----
> From: Mick Furlong [mailto:dorsai@xxxxxxx]
> Sent: 02 August 2001 19:45
> To: ukha_d@xxxxxxx
> Subject: RE: [ukha_d] Whole House Audio 64 ohm speakers
>
>
> Thanks for the response Keith...quality isn't that important as the
prime
> use is for announcements. I prefer to keep music and
> announcements seperate.
> I believe I understand your advice about wiring them in parallel like
> this..........
>
>       -----------------------------------------------------
>
>      AMP               SPK        SPK       SPK          SPK x 8
>
>       -----------------------------------------------------
>
> .....and then the same for the other channel if stereo.
>
> But I am not sure what you mean by switching them in and out, that
will
> change the impedance won't it? I thought you had to worry about that?
>
> Cheers
> Mick
>
>
> > -----Original Message-----
> > From: Keith Doxey [mailto:ukha@xxxxxxx]
> > Sent: 02 August 2001 12:28
> > To: ukha_d
> > Subject: RE: [ukha_d] Whole House Audio 64 ohm speakers
> >
> >
> > Not at all....they could be ideally suited.
> >
> > 8 x 64 ohm speakers in parallel would give 8 ohms.
> >
> > You could add 8 different rooms to one amplifier and simply
> > switch speakers
> > on and off without worrying about the impedance. (As long as you
> > dont use a
> > Valve Amp.)
> >
> > The big question is.....how do they sound ?
> >
> > Keith
> >
> > -----Original Message-----
> > From: dorsai@xxxxxxx [mailto:dorsai@xxxxxxx]
> > Sent: 02 August 2001 11:21
> > To: ukha_d@xxxxxxx
> > Subject: [ukha_d] Whole House Audio 64 ohm speakers
> >
> >
> > Am I right in thinking that 64 ohm speakers would be of no use
> > whatsoever for whole house audio?
> >
> > Mick
> >
> >
> >
> >
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>
>
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