[asterisk-users] How to calculate number of speakers needed for PAGING and INTERCOM coverage area?

[bruce bruce]

Thanks fro the input. The area is a 40000 square feet. So, you are saying
that if I use four speakers then they would not be as loud as needed?

Thanks again

2010/7/9 Massimo Nuvoli <massimo at archivio.it>

> bruce bruce ha scritto:
> > Hi Guys,
> >
> > I am looking to buy a 25 Watt output CyberData VoIP amplifier and to use
> > 2 Bogen sp308a speakers with it for a 40, 000 squar feet area and 21
> > feet height. Is that enough? Is there calculator online I can use to
> > determine the number of speakers needed? I guess these speakers go in
> > chain so I am not sure if the full capacity of the speaker (30 watt)
> > will be used.
>
> Hummmm interesting... i never checked this kind of product.
>
> CyberData has calculator only for the 8W model, but... every speaker
> they sell is 8w and the calculator say 69 speakers. You can attach 2
> speakers to one amplifier in parallel (they say this also), this is
> the maximum as the amplifier cannot reach 32W (4 speakers), but you
> can try to use 4 speakers (2 in parallel + 2 in parallel) with a
> little less than maximum 8w on each speaker.
>
> I think a reasonable number of speakers may be less than half, but you
> must check wath is in the area, also remember if this is a warehouse
> to place the speakers where a person can be, not goods. :-)
>
> For a so big installation think to use a voip interface and
> professional product with low voltage line speakers, i think is less
> expensive.
>
> Bye.
>
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