Vehicle-mounted loudspeaker system for public announcements, or mobile
public address system.

We are looking for a mobile loudspeaker system or service that we can
use to make public service announcements from a moving vehicle. A
'sound truck' or large battery-driven loudspeaker system that can be
mounted on a pickup or van. The purpouse is to drive slowly through
streets playing a short recorded announcement. We prefer a full system
(vehicle, sound system, tape player, etc) but will consider a sound
system that we can mount on our own vehicle. We need this in
South-East Arizona area - Cochise County, Tuscon or even Phoenix if
necessary.

David,

You're not doing a re-make of the Blue's Brothers are you?

Phil

Manufacturers of police sirens and lightbars often have this sort of
equipment in their range, such as the models on this page (UK site)
that include PA function (optional with recorded speech)
http://www.premierhazard.co.uk/sirens2.html
or
http://www.999supplies.com/product_info.php/cPath/82/products_id/1984?

Ordinary service PA equipment for schools, political canvassing, etc,
is fairly standard and can be sourced from most public address
manufacturers. If you are in the US, www.radioshack.com has a 40W amp
which runs on DC, stock no 32-2054, and horn speakers such as 40-1440
should be suitable (I sould suggest 2 speakers as they are fairly
directional). You will also need a microphone and a connecting lead
for your recorded sound source (flash memory MP3 player probably a
good idea).

Owain