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

[Massimo Nuvoli]

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.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: massimo.vcf
Type: text/x-vcard
Size: 354 bytes
Desc: not available
Url : http://lists.digium.com/pipermail/asterisk-users/attachments/20100709/ae0dd8c2/attachment.vcf 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 250 bytes
Desc: OpenPGP digital signature
Url : http://lists.digium.com/pipermail/asterisk-users/attachments/20100709/ae0dd8c2/attachment.pgp