Re: Announcements over Cat5e?

["Mike Humberston" <mike@xxxxxxx>]

--- In ukha_d@y..., "Tony T" <tony@x> wrote:
> > > Question for Ian Bird really but presumably I could just use
one of 
> > > his relay board and connect the amp output up to the output
voltage 
> > > supply plug and switch them on like that or able I losing
> > the plot a 
> > > bit.
> > > 
> > > S.
> > 
> > You've probaly lost the plot!
> > 
> > Use something like QED's WM14 for each speaker to allow you 
> > to switch it off and control its volume.
> > 
> 
> I imagine he'd like his ha system to be able to switch the
speakers
> in and out?
> Rather than doing it manually locally.

Would this really give any practical advantage?  The advantage of
using something like the WM14 is that you can control the volume of each
speaker locally and independantly from the others without having to add
extra amplifiers.  I found from practical experience that independant
volume control can be essential.  I started with switches and had add
the volume control when I found that switches alone were inadequate.

If you insist on relays then make sure that they have gold contacts or
after a while you may have problems with poor continuity.

Mike





http://www.automatedhome.co.uk
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