Bogen NEAR Orbit OCS1 User manual

Description Features
• Wide-dispersion coaxial driver for broad, even 140° coverage
• Stable, high definition metal-alloy cone
• MDT™ cone design delivers detailed sound
• MLS™ eliminates conventional centering “spider” for
more accurate voice coil centering
• High-efficiency drivers deliver superior performance
• Extremely good off-axis response
• Computer-matched venting system for full bass output
• High power handling capability for foreground sound
• Selectable power taps via front-mounted control
•16-ohm input for non-transformer multi-speaker systems
• Easy wiring with snap-on connector
• Connector provides loop-through to next speaker
• Attachment point for seismic cable (safety cable)
• Input terminal cover with knockouts and safety eyelet
provides protection for connections
• Low-resonance cabinet structure
• Off-white textured finish; easily painted to match theme
decors
• Attractive, contemporary, sturdy steel grille assembly with
fine perforation(s)
• Accessory tile bridge support ring (Model TBCR sold
separately)
• Accessory 10-foot long cable kit (Model CK10 sold
separately)
The Orbit Ceiling Speaker (OCS1) is the ideal choice for various
types of ceiling environments.
The OCS1features NEAR's MLS™ and MDT™ technologies
(see below), which improve sound quality and increase operating
reliability.
The low-distortion speaker design, featuring NEAR's spiderless
driver and one-piece metal-alloy cone structure, delivers superb
articulation and the highest intelligibility for both music and
speech.
The speaker can be easily installed on hard surfaced ceilings, or
in suspended ceilings and new construction (with the optional
TBCR bracket).
MDT™ (Metal Diaphragm Technology)
• Solid, one-piece cone structure eliminates the traditional
dust cap
• Extremely stable cone structure over long periods of time
• Fast transmission of sound through the diaphragm means
low energy storage
• Special hard anodizing process creates a ceramic surface for
increased stiffness
• Super-efficient thermal path for cooling the voice coil
(not paper or plastic)
• High rigidity and low mass of metal versus typical paper or
plastic cones
MLS™ (Magnetic Liquid Suspension)
• Magnetic liquid (Ferrofluid) injected into magnet gap
• Elimination of the conventional cloth centering spider
• Constant lubrication of the gap prevents oxidation from
occurring
• Voice coil is most efficiently cooled by fluid path rather
than air
• Lower distortion via stronger centering forces on voice coil
• Increased reliability, particularly in high power daily use
systems Specifications subject to change without notice.
© 2003 Bogen Communications, Inc.
Part No. 54-8016-01B 0712
Orbit
Ceiling Speaker
Model OCS1

Technical
Specifications
The loudspeaker shall be a NEAR Orbit Model OCS1
Ceiling Speaker or approved equivalent, consisting of one
6-1/2" (nominal) low frequency transducer, one 20mm
(3/4") (nominal) high frequency transducer with a filter net-
work for dividing frequencies between the transducers.
The front baffle shall be injection-molded, ABS material con-
taining fire inhibitors with a 94VO rating, and the back can
(enclosure) shall be plated steel. All components shall be
mounted inside the enclosure.
The baffle shall be supplied in off-white with a mild texture
finish to promote paint adhesion if desired. A perforated
speaker grille shall be made from heavy-gauge steel, color-
matched to the baffle.
The low-frequency driver shall utilize a metal-alloy cone
with hard-anodized surface treatment for rigidity and cor-
rosion resistance.The cone shall provide a heat transfer ele-
ment for the voice coil under high-power input. A com-
pounded rubber cone surround shall be formulated to with-
stand environmental conditions with high or low heat, high
or low humidity, and ultra-violet light.The voice coil shall be
protected via a high gauss low viscosity magnetic liquid (fer-
rofluid), to prevent corrosion from occurring in the magnet
gap. The fluid will also serve as a thermal path to further
reduce heat build-up in the voice coil.The driver will utilize
the ferrofluid to provide centering force for the voice coil in
the magnet gap.
The high-frequency driver shall utilize a diaphragm consist-
ing of black polycarbonate. Ferrofluid shall dampen the voice
coil and facilitate the transfer of heat from the coil to the
magnet structure.
Integral swing-out clamps shall provide a secure installation in
the ceiling surface. A safety cable attachment point shall be
included in the removable terminal cover enclosure. An
optional 10-foot long cable kit shall be available to serve as a
back-up support cable (Model CK10).An optional tile bridge
support ring installation bracket shall provide additional sup-
port when mounting the loudspeaker into suspended ceilings
(Model TBCR).The bracket shall also serve as a pre-installa-
tion guide for new construction installations,providing attach-
ment to either 16" OC or 24" OC mounting.
The input connector shall be a 4-screw snap-lock input con-
nector, providing "loop-through" for additional speakers.
Power input selection shall be via a front-mounted rotary
switch, located under the removable grille. 70V (high-imped-
ance) tap selections shall be 1, 2, 4, 8, 16, and 32 watts; 100V
(high-impedance) tap selections shall be 2, 4,8,16, and 32 watts.
A low-impedance 16-ohm selection shall also be provided.
Usable coverage area shall be 140°
Dimensions of the speaker shall not exceed 12-3/8" diame-
ter x 12" D. Weight shall be 10 lb.
Architect & Engineer
Specifications
SPECIFICATIONS OCS1
Frequency Response (-10 dB)*45 Hz to 19 kHz
LF Driver 6-1/2" MDT Metal-Alloy Cone (MLS Voice Coil Centering System)
HF Driver 20 mm (3/4") Polycarbonate Dome
Sensitivity (1W/1M) 89.5 dBspl (Average 100 Hz - 10 kHz)
Impedance Ratings Low (16 ohms) / High (70V/100V)
Power Input (Max.) 100W @ 16 ohms; 32W @ 70V/100V
Power Settings (in watts)†70V: 32, 16, 8, 4, 2, 1
100V: 32, 16, 8, 4, 2
Baffle Material Fire-rated (94VO) ABS
Back Can Material Heavy-Gauge Plated Steel
Terminations 4 Terminal Snap-Lock Input Connector
Product Weight 10 lb.
Speaker Dimensions 12-3/8" dia. x 12" D
Vertical Clearance Requirement Minimum 11" (From Mounting Surface Front)
Included Accessories Input Terminal Cover (2 Halves); (4) Screws; (1) Snap-Lock Input Connector
Optional Accessories Tile Bridge Support Ring (TBCR); Cable Kit (CK10)
Baffle Ring & Grille Color Off-white
*Half-Space Response, 16-ohm input
† Front panel, switch-selected (under grille)

Off-Axis Response
Graph shows modification to an on-axis
response.
Frequency Response
Half-space @ 1m
Polar
Response
500 Hz
1 kHz
2 kHz
4 kHz
8 kHz
16 kHz
(dBspl)
(Hz)
(dB)
(Hz)
Output Level @ 1m
Attenuation
32W
16W
8W
4W
2W
1W
16 ohms
(@ 1W)
90 deg
60 deg
45 deg
30 deg
15 deg
0 deg

50 Spring Street, Ramsey, NJ 07446, USA
Tel: [phone] • Fax: [phone]
www.bogen.com
Mechanical Drawings

(Grille shown partially removed)