EAW CIS300 Specifications

Part No. 0009731  Rev C  07/07

DESCRIPTION

The CIS300 is a compact two-way flush-mount loudspeaker 

assembly designed for fixed installations into typical ceiling plenum 

spaces. Employing a modified HF waveguide originally developed 

for use in studio monitors, the CIS300 delivers superior dispersion 

and pattern control over conventional coaxial designs. The 

waveguide integrates the HF driver with a 4” LF driver optimized for 

smooth frequency response and seamless transition through the 

crossover point. The result is acoustic performance not generally 

associated with a commercial ceiling speaker of this size or in this 

price range.

The CIS300 is supplied fully assembled, complete with a sealed zinc-

coated steel backcan and cam-style installation clamps. The metal 

enclosure includes a recessed Euroblock input connector with 

detachable mating plug, concealed behind a hinged metal cover 

plate. A welded tab is provided for seismic restraint. Two steel T-Bar 

support channels are provided to facilitate installation to a standard 

tile ceiling. Also supplied is a steel split C-ring, which serves to 

disperse the clamping pressure of the mounting cams.

The CIS300 is supplied with an integral 70/100V line transformer 

rated to a maximum of 30 watts. Power is adjustable by means of 

a recessed rotary switch on the front bezel, and allows selection 

of 30, 15, 7.5, and 3.7 watt taps. A second recessed rotary switch 

is provided to engage a 16-ohm tap for use with low-impedance 

amplifiers, or a 150 Hz high-pass filter.

The speaker assembly is shipped with a detachable paper cover 

fitted over the transducers inside the bezel. This protective cover 

protects the drivers from damage during installation and also 

serves as a paint cover, allowing convenient spray painting to match 

interior décor. A powder-coated perforated steel grille is supplied, 

and easily installed once the desired Tap Selector and Full-Range/

High-Pass switches have been set.

The entire assembly is fully tested at the time of manufacture and 

is warranted to be free from defects in materials and workmanship 

for a period of five years from the date of purchase. The speaker 

is designed for use in ceiling plenum spaces and meets UL 1480 

and UL 2043 regulations governing signaling devices and plenum 

applications.

CIS

300

TWO-WAY CEILING MONITOR

•   High-efficiency 4” polypropylene woofer

•  140º x 124º constant directivity horn with 1” cloth  

dome tweeter

•  Built-in LICC low-inductance passive crossover with high 

frequency dynamic protection

•  Lightweight, UV/weather resistant, high density 

polystyrene, flush-mounting enclosure for multiple 

applications and minimum visual intrusion

•  Integrated mounting system and hardware included

•  UL/cUL/CE listed

Features

•  Meeting Rooms 

•  Hotels

•  Houses of Worship 

•  Boardrooms

•  Courtrooms 

•  Multi-Purpose Facilities

•  Multizone Paging/Music Systems

Applications

Eastern Acoustic Works   |   One Main Street   |   Whitinsville, MA  01588  USA   |   TEL toll free within US/Canada 888.337.7404 

TEL outside US 425.892.6503   |   FAX 425.485.1152  |  Page 1 of 2