Data Sheet

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Industrial/Institutional Surface
Mount Speaker System
for Voice Communications
IS4 Series
MODEL RATED WT.
NO. INPUT WATTS IMPEDANCE (lbs.)
IS445 45 ohms 16 45 ohms 5
IS4T16 25 V line 39,78,156,312
16,8,4,2 5.5
70 V line 312,625,1250,2500
INPUT TAPS
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Surface-mount speaker system built to survive
harsh treatment of industrial/institutional use.
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Sturdy spin-formed steel housing is protected
by a non-glare white baked powder coat finish.
■
Rugged integral compression driver for noise
penetration and speech intelligibility.
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16 watts continuous duty, 500 Hz to 7000 Hz
frequency range.
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25/70 volt line Model IS4T16 has taps at
16, 8, 4 & 2 watts.
■
45 ohm Model IS445 has excellent sensitivity
as a microphone in talk-back systems.
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Versatile mounting allows surface conduit or
in-wall electrical box wiring.
RESPONSE CURVE
POLAR PLOT