RE: TTS and how to do it?

["Keith Doxey" <lists.diyha@xxxxxxx>]

Not true....

If all the speakers are 8 ohm you can use a relay to switht between either
a
speaker or an 8ohm resistor used as a dummy load.

It keeps the impedance constant so volume doesnt change in each room.

Keith

-----Original Message-----
From: Mark Harrison [mailto:Mark.Harrison@xxxxxxx]
Sent: 14 June 2002 12:09
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] TTS and how to do it?


Well,

If

- the speakers are all the same
- this is a powerful amp
- it's signal mono
- it's only for low-volume

I'd wire them as 4 speakers per channel, with a line-level stereo-mono lead
to give the same feed.

They'd be two parallel chains, each of two speakers IN SERIES.

The downside is, of course, that you have to run ALL speakers - you can't
zone it.

Regards,

Mark



-----Original Message-----
From: Frank Mc Alinden [mailto:armagh@xxxxxxx]
Sent: 14 June 2002 11:58
To: ukha_d@xxxxxxx
Subject: Re: [ukha_d] TTS and how to do it?


Hi Ian
I Agree simple is best but how do you connect 8 speakers to 1 source
without loading the amp?
Frank Mc








----- Original Message -----
From: "Kenneth Watt" <kennwatt@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Friday, June 14, 2002 8:48 PM
Subject: RE: [ukha_d] TTS and how to do it?


> I like the way you're thinking Ian, simple is best and less likely to
> fail!
>
> K.
>
> >
> > Perhaps it's a design philosophy, but I really prefer the
"dumb node"
> > approach wherever possible.
> >
> > Why have an amp + power + mute intelligence in each zone, when
you can
> > have
> > just a speaker, and a single wire run to it?
> >
> > I think the idea of using somehting like Ian B's irrigation relay
> board to
> > switch on/off the zones seems like the best (for me anyway!)
> >
> > perhaps you could use connect the relays such that when closed,
the
> zone
> > speaker is in circuit, wheras if it's open, an 4 or 8 ohm power
> resistor
> > is
> > in circuit instead?
> >
> > Ian.
>
>
>
>
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>
>
>



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