SP400C
2-Way Ceiling Monitor
1
O F 6 P A G E S
SPEAKER
SP
40
0C
1
O F 2 P A G E S
Features
Proprietary waveguide design to improve high-
frequency dispersion
Ported design for extended
low-frequency response
1-inch soft-dome tweeter with neodymium
magnetic motor structure
6.5-inch low-frequency woofer
Built-in 70/100V transformer with multiple taps
Transformer bypass for low-impedance
operation (16 ohms)
True 2-way crossover
Built-in switchable high-pass filter
Complete assembly for quick installation
UL/cUL/CE listed
Applications
Business Music Systems
Restaurants and Bars
Hotels
Convention Centers
Recreational Facilities
Churches
Airports
SP400C
The SP400C is a complete two-way bass-reflex
flush-mount loudspeaker assembly designed for fixed
installations into typical ceiling plenum spaces. Employ-
ing a unique HF waveguide design based on our HR824
studio monitors, the SP400C delivers superior dis-
persion and pattern control over conventional coaxial
designs. The waveguide integrates the HF driver with a
6.5" LF driver optimized for smooth frequency response
and seamless transition through the crossover point.
The result is extraordinary acoustic performance not
generally associated with a commercial ceiling speaker
in this price range.
The SP400C 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 SP400C 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 pro-
vided to engage a 16-Ohm tap for use with low-imped-
ance amplifiers, or a 150 Hz high-pass filter, allowing
the SP400C to be used as either a full-range speaker for
stand-alone applications or as a satellite speaker when
used with the SP800S subwoofer.
The speaker assembly is shipped with a detachable
plastic 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 2034 regulations governing signaling devices and
plenum applications.
