Re: Whole-house audio

[Jerry Treweek <J.treweek@xxxxxxx>]

Hi Brendan,

thats a very kind offer - yes please!

Jerry Treweek
2 Rutland Avenue
Lancaster
LA1 4EZ

Enclose your address and I'll happily cover your costs.

Thanks


Jerry




Brendan wrote:

> Folks,
>
> Think I might have an answer to your requirement.
>
> I have an article published by Steve Ciarcia in 1986 covering design
of a 8
> x 8 cross-bar switch (scalable in multiples) allowing any Audio /
Video i/p
> to be switched to any of the
> 8 (or multiples of) o/p.
> Utilises RCA 74HC22106 crosspoint switch which presents some 95 ohms
ON
> resistance and some 9MHz bandwidth.
> Routeing of any i/p to any o/p is achieved by clocking a 6-bit address
onto
> the switch.
>
> I obtained this some years ago wvt building but it is, unfortunately,
one of
> the many items I have never 'got around to' ... so no info on its
operation
> in anger.
>
> If any of you interested I'd be happy to snailmail photocopies of the
> article of scan and mail
> (15 pages).
>
> Let me know.
>
> Brendan
> -----Original Message-----
> From: Nigel Orr <nigel.orr@xxxxxxx>
> To: ukha_d@xxxxxxx <ukha_d@xxxxxxx>
> Date: 03 November 1999 08:50
> Subject: [ukha_d] Re: Whole-house audio
>
> >At 16:39 02/11/99 +0000, you wrote:
> >>I'm working on a similar idea. I would like to distribute hifi
- (yes
> hifi)
> >>from a central system, the intention being to have computer
control over
> the
> >>routing at some future point.
> >
> >'Me Too'...
> >
> >>people who share the house...) so I've been turned into a
carpenter making
> >>stair gates - anyway I digress...
> >
> >If you hadn't been digressing, you might not have had to make
stair gates
> ;-)
> >
> >>The idea of a multi-input multi-zone amp sounds rather like
100volt
> speaker
> >>drivers - I really don't think you're going to get hifi
quality through
> that.
> >
> >Not necessarily.  Lots of the big PA systems (EAW, Meyer etc) use
high
> >voltage distribution rather than 8 ohm, just to cut the losses in
the line.
> > There are good music quality 100V transformers around (try
Canford, for
> >starters), but good transformers aren't particularly cheap.  There
are also
> >some speakers (like the odd looking Canon wide dispersion thingys)
that
> >come with 100V as an option instead of 8 ohm.
> >
> >>You really do need an amp (preferally with a
differential/balanced input)
> >- eg
> >>Samson 'servo' series of studio amps (excellent value)
> >
> >I'd agree with that as the best approach, but for some rooms where
you
> >don't want 'things', a central amp would be better.  In a typical
house,
> >with speakers run on 2.5mm T&E mains cabling, there would be
few who could
> >claim to notice the difference between a 2-3m run and a 10-20m
one.
> >However, the potential interference from the long runs of cable
near other
> >signal cables might be an issue.
> >
> >>I think that using a network link and mp3'ing to each room is
a very
> >expensive
> >>way to go
> >
> >Agreed 110%!  At least for now.  MP3 decoders are actually getting
_very_
> >cheap, but if you've run cat-5 for audio, you might be able to use
the same
> >cable for digital audio and video in future.  That'll be the Kat-5
plus,
> >right Keith?
> >
> >Nigel
> >
>
>------------------------------------------------------------------------
> >-- 20 megs of disk space in your eGroup's Document Vault
> >-- http://www.egroups.com/docvault/ukha_d/?m=1
> >
> >
> >
>
>
------------------------------------------------------------------------
> eGroup Home: http://www.egroups.com/group/ukha_d/
> http://www.egroups.com -
Simplifying group communications


------------------------------------------------------------------------
-- eGroup Home: http://www.egroups.com/group/ukha_d/?m=1
-- Free email groups at eGroups.com