Re: TTS and how to do it?

["Frank Mc Alinden" <armagh@xxxxxxx>]

Hi keith
Some of the guys are also after vol control for each zone
individually any ideas . I recall you did something with a dallas digital
pot?

Frank Mc
----- Original Message -----
From: "Keith Doxey" <lists.diyha@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Friday, June 14, 2002 9:25 PM
Subject: RE: [ukha_d] TTS and how to do it?


> 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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