TOA PA horns Wiring

Archived from groups: rec.audio.pro (More info?)

Hi there,

Our Rugby club has just inherited 6 TOA PA horns. They are not new but
are considerably better than the ones we have. We have just had new
110v line amps fitted and we want the new flared horns to do the system
justice. The only thing we didnt get are the connectors for the horns.


They are a circular connector with a screw thread around teh outside
edge and an arrangement of four pins set in a square. i think this is
a standard connection for TOA, but i need to know where we can get the
connectors, and what are the wiring directions for this type of
connector.

Any help would be most appreciated.

Thanks in advance

Ian R

Archived from groups: rec.audio.pro (More info?)

Big E <sezsame@hotmail.com> wrote:
>
>Our Rugby club has just inherited 6 TOA PA horns. They are not new but
>are considerably better than the ones we have. We have just had new
>110v line amps fitted and we want the new flared horns to do the system
>justice. The only thing we didnt get are the connectors for the horns.
>
>
>They are a circular connector with a screw thread around teh outside
>edge and an arrangement of four pins set in a square. i think this is
>a standard connection for TOA, but i need to know where we can get the
>connectors, and what are the wiring directions for this type of
>connector.

They are an old Amphenol series, and I bet a nickel that if you take
the speaker down to Maplin, they will have them on the shelf as a "CB
Microphone" connector.

I forget which pins are used, but as I recall on some models you can
use two pins for an 8-ohm connection or the other two for 100V, whereas
with other models there are only two pins connected for 100V use only.
An ohmmeter should tell you this easily, though. Two pins will be
connected together and not connected to the other pins.... and the
other two pins will be connected together and not associated with the
first pair (if it's got an 8-ohm connection as well). The pair with
the higher resistance between them is the 100V one.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."