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Revised May 15, 2006

Valcom One Way Speakers and MultiPath

There are 2 types of speakers commonly used with new Valcom MultiPath

communications systems – 45-ohm talkback and One Way Self Amplified.

45-ohm talkback speakers are used in areas such as offices and classrooms

where it is desirable to hear a response from individuals in the paged area. It is

possible to connect up to two talkback speakers to each MultiPath talkback zone.

Areas requiring more than 2 speakers, such as hallways and large common

areas, may be accommodated through the use of Valcom One Way Self

Amplified Speakers.

Valcom One Way Self Amplified speakers offer many advantages in all public

address system applications, but especially in the multiple zone applications

inherent to Valcom MultiPath systems. These state of the art speakers and horns

are available in many different styles, including our most popular and easy to

install Lay In Ceiling Tile replacement.

Valcom One Way Self Amplified speakers feature a point of amplification-

matched amplifier built in to each and every speaker and horn. This ingenious

design allows installers to utilize inexpensive Cat 3, 5, 6 UTP wire for the public

address installation, typically eliminates costly conduit requirements, offers easy

system volume balancing through built in volume controls, and facilitates multiple

zones by eliminating zone restricting amplifiers. By following a few simple

guidelines, adding Valcom One Way Self Amplified speakers to a MultiPath

system is easy.

1) One-way self amplified speakers feature power and audio on separate

pairs thus eliminating limitations commonly associated with systems that

power and drive the speakers over a single heavy gauge, shielded pair of

wires.

2) Zone audio, originating from the MultiPath system, is typically distributed

to strategic locations, central to speaker locations, throughout a facility.

These strategic locations are referred to as intermediate distribution

frames (IDFs). Individual zone wire runs then feed from these IDFs to the

individual talkback and one-way zones.

3) The power supplies used to power one-way self-amplified speakers

should be located in the IDF locations, close to the speakers, thus

facilitating the use of inexpensive 24 AWG UTP wire for both power and

audio.

4) All Valcom One Way Self Amplified speakers and horns have a published

“power unit” (VPU) requirement. Likewise, all Valcom power supplies have

a published “power units” provided rating. Selecting the right power

supply or supplies for an IDF is as easy as adding up the individual “power

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