They look nice Dave - it would have to be a well funded project to afford
them though. I also wonder whether they could survie the sauna test for
years..... humidity and heat being the main problems.

On 29 June 2017 at 18:30, Dave Malham <dave.mal...@york.ac.uk> wrote:

> If you don't mind using analog audio, Meyer do some very nice, waterproof
> powered speakers (MM-4XP). They use a specially designed cable which
> carries balanced audio and DC power. The connector is a bit fiddly to wire
> up and they are not cheap but we got very good results from them in the
> Morning Line project (
> https://www.wallpaper.com/architecture/the-morning-line-
> sonic-temple-istanbul
> )
>
>    Dave
>
>
> On 29 June 2017 at 17:48, Marc Lavallée <m...@hacklava.net> wrote:
>
> >
> > The limit is actually more like 13W per device, according to:
> > https://fr.wikipedia.org/wiki/Alimentation_%C3%A9lectrique_
> > par_c%C3%A2ble_Ethernet
> > A Raspberry Pi and a DAC would use 5 to 6W, leaving 7-8W to a D-amp.
> > With efficient loudspeakers (and a few of them), 6W could enough
> > for a small public installation.
> >
> > A hackish alternative would be to use only 2 pairs of a CAT5 cable
> > for a 100BT link (which is enough to stream audio), and use the 2 other
> > pairs to transmit power (as much as required).
> >
> > Running speaker wires is also a valid solution...
> >
> > --
> > Marc
> >
> >
> > On Thu, 29 Jun 2017 09:10:12 -0700, mgra...@mstvp.com wrote:
> >
> > > Hi,
> > >
> > > This is an interesting discussion. Common, 802.3af P.O.E. is limited
> > > to 15w. Fine for a Raspberry Pi, DAC or DSP, but not enough for much
> > > amplification.
> > >
> > >  Michael Graves
> > >  mgra...@mstvp.com
> > > http://www.mgraves.org
> > > o(713) 861-4005
> > >  c(713) 201-1262
> > >  sip:mgra...@mjg.onsip.com
> > >  skype mjgraves
> > >
> > >
> > > --------- Original Message --------- Subject: Re: [Sursound]
> > > Multichannel players for permanent installations From: "Dave Hunt"
> > > <davehuntau...@btinternet.com> Date: 6/29/17 11:04 am
> > > To: sursound@music.vt.edu
> > >
> > > Hi,
> > >
> > >  I think that you'll find that an active speaker with an AVB input
> > >  will require more current than can be supplied over an ethernet
> > >  cable. Perhaps for very small speakers with a low power digital
> > >  amplifier, but anything decent would require mains (or DC batteries)
> > >  to the speaker.
> > >
> > >  The available current may power the DAC though.
> > >
> > >  Ciao,
> > >
> > >  Dave
> > >
> > >  > From: Augustine Leudar <augustineleu...@gmail.com>
> > >  > Date: 28 June 2017 22:06:52 BDT
> > >  > To: Surround Sound discussion group <sursound@music.vt.edu>
> > >  > Subject: Re: [Sursound] Multichannel players for permanent
> > >  > installations
> > >  >
> > >  >
> > >  > Hi Richard -
> > >  > There is lots of things that pan all around the room but the
> > >  > soundscape is
> > >  > designed in pre production for this installation and then its just
> > >  > a multichannel file (or seperate mono ones). Other installations I
> > >  > do are
> > >  > interactive and so sounds are processed and panned in realtime
> > >  > around the
> > >  > space depending on the sensors used etc. Certainly the AVB thing
> > >  > might be
> > >  > good for some less inhospitable environments- I especially like
> > >  > the way
> > >  > power can be taken to the the speakers via the ethernet
> > >  > cable.....
> > >
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>
>
> --
>
> As of 1st October 2012, I have retired from the University.
>
> These are my own views and may or may not be shared by the University
>
> Dave Malham
> Honorary Fellow, Department of Music
> The University of York
> York YO10 5DD
> UK
>
> 'Ambisonics - Component Imaging for Audio'
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-- 
Augustine Leudar
Artistic Director Magik Door LTD
Company Number : NI635217
Registered 63 Ballycoan rd,
Belfast BT88LL
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