Bogen NEAR Orbit OCS1 Guide

© 2003 Bogen Communications, Inc.
All rights reserved.
Specifications subject to change without notice.
54-2089-01C0711
Orbit Ceiling Speaker
OCS1
Installation and Use Manual

Product Description
Thank you for choosing NEAR® Orbit Loudspeakers.You have purchased one of the
finest ceiling loudspeakers available today, the NEAR Model OCS1. Please familiarize
yourself with this product by reading and reviewing the descriptions and diagrams in
this manual.
All NEAR products include similar technical and design aspects that are unique to
the market. NEAR invented and patented the "spiderless" woofer (MLS™), which
features a high-gauss ferrofluid to guide the voice coil through the magnetic field.The
benefits over conventional woofers with cloth spiders are several, including the
ability to constantly adjust voice coil alignment, extend linear excursion, and the
most efficient path for cooling the voice coil.
In addition, the use of metal-alloy cone structures provides several benefits over the
usual paper or plastic cone, such as elimination of cone flex or "break-up" in the
operating ranges, additional thermal path for the voice coil to stay cool, and an
extremely stable cone structure unaffected by changes in temperature.
The NEAR OCS1Ceiling Loudspeaker is a full-range, wide dispersion system providing
high-quality background and foreground music. It can be installed in either suspended
ceiling structures or hard surfaces such as sheetrock. It comes ready to install with
integral swinging arm clamps. An optional mounting bracket (TBCR) is available for
additional support (recommended for all suspended ceiling applications).The brack-
et can also be used for new construction ceilings, providing a cutout guide behind
the sheetrock surface and as a C-ring to stiffen the edges of the cutout opening.
A variety of speaker power levels are easily selected via a front panel rotary switch.
Settings for both 70V and 100V high-impedance systems, as well as a low-impedance
(16-ohm) position, are provided.
The OCS1features a removable snap-lock input connector, providing easy wire
connection for input as well as loop-through to the next speaker.
IMPORTANT
The OCS1is not an outdoor speaker. Do not expose the speaker to rain or
moisture.The OCS1should be installed by qualified personnel.

Product Diagrams
OCS1Front Drawing (grille removed)
1. Coaxial Driver Assembly
2. Bass Tuning Vents (x2)
3. Grille Retention Groove
4. Power Tap Selection Switch
5. Mounting Clamp Screws (x4)
OCS1Rear Drawing
6. Metal Back Can
7. Snap-Lock Input Connector
8. Mounting Clamps (x4)
OCS1Rear Drawing (terminal cover)
9.Terminal Covers (2 identical halves)
10. Eyelets (x2)
11. Mounting Screws (x4)
12.Wire Exit Slot
13. Conduit Knock Out (x2)
OCS1Front Drawing
(grille removed)
OCS1Rear Drawing
OCS1Rear Drawing
(terminal cover)
1

Installation
The OCS1can be installed in a variety of ceiling environments.The use of the TBCR
(Tile Bridge Support Ring) accessory may be desired for many of these environments.
For suspended ceilings, the use of a TBCR is strongly recommended to
help support and distribute the weight of the speaker.
In new construction installations, the TBCR, installed before sheetrock, acts as a
routing template that ensures an accurate and neat hole for installation.The TBCR
can also be used as a support ring in retrofit applications to better distribute the
speaker’s clamping forces.
1. Begin by cutting a 10-¾" circular hole where the OCS1will be installed. If using
aTBCR, then follow its installation instructions for the specific type of environment
the OCS1is being installed in.
2. Make electrical connections to the pluggable terminal strip and plug it onto the
OCS1. See Speaker Wiring section.
3. Install terminal cover plates, if necessary or desired, using 4 screws. See the
Terminal Covers section if using conduit or if it is required to secure the speaker
directly to the structure (typically for suspended ceilings).
4. Remove the speaker’s grille. See Speaker Grille Installation & Removal section.
5. Set the power level using the rotary selector switch on the front panel. Refer to
the Selecting Power Levels section for instructions on selecting the power level.
6. Position the swing-out clamps so that they are against the body of the speaker
and insert the speaker into its opening in the ceiling.
7. Tighten the clamps by turning the clamping screws clockwise. Do not over-tighten
the clamps - only tighten until the speaker is fairly snug in the mounting hole. If
using an electric driver, set the clutch on the driver to the lowest setting.
8. Re-install the speaker’s grille. See Speaker Grille Installation & Removal section.
2
IMPORTANT
• There must be a minimum of 11" of vertical clearance between the FRONT
of the mounting surface and any other structure for the speaker to fit. Before
cutting the full hole, use a smaller exploratory hole to determine if there are
any obstructions.
• The edge of the hole must be a minimum of 1-¼" away from any side obstruc-
tions to ensure that they will not interfere with the action of the clamps.

Speaker Wiring
All wiring should be done prior to installation
and then plugged into the rear of the OCS1.
Wiring is terminated at a snap-lock input
connector. There are two positive and two
negative terminals to accommodate daisy-
chaining of speakers in a system.
Daisy-Chaining
The OCS1’s snap-lock input connector allows
for easy daisy-chaining of speakers by providing
a second terminal of each polarity. See the
figures to the right and below for correct
wiring for daisy-chaining of terminals.
Speaker Phasing
Keep the same polarity terminals wired together to ensure correct phasing. In order
to provide the best possible sound, all of the speakers in a system need to be
pushing out and pulling in at the same time.
If the connections to one speaker in a system are reversed from the others, that
speaker’s movement will be out of sync with the other speakers.This will result in a
loss of low frequency response and will effect the overall performance of the system.
Terminal Covers
• The two terminal cover halves are attached to the back of the speaker using 4
screws. It is important that all 4 screws be used to mount the covers.
• A slot between the two halves allows the wire to exit the speaker while
protecting the connections.The cover's eyelets can be used to anchor the wire
using a wire tie if desired.
• If local codes require the use of a conduit for connections or strain relief of the
connections, a knockout can be removed and a proper fitting installed for the
particular situation.
• Eyelets are provided on the terminal covers to provide a means of securing the
speaker to the structure when necessary. It is important that all 4 terminal cover
attaching screws be installed in this application.
3

Selecting Power Levels
The front-mounted selector switch (under
grille) is used to set the appropriate power
level or impedance for your system. Using a
small, flat-blade screwdriver, turn the knob
until the slot points to the power level you
require.
70V/100V Systems
Both power setting scales for 70V and 100V
systems are labeled on the speakers. On the
100V scale, the last position clockwise is
marked with a symbol. Do not use this
position in 100V systems.
16
Ω
Systems
The fully counterclockwise position of the setting switch is the 16-ohm position.
This setting is suitable for use with low-impedance amplifiers that typically sup-
port 4- or 8-ohm speakers. The speaker’s higher, 16-ohm impedance makes it
easier to combine multiple speakers into series-parallel networks while keeping
the total system impedance at a level suitable for low-impedance amplifiers.
Speaker Grille Installation &
Removal
Installation
The speaker grille fits tightly! Push the speaker
grille in until it can go no further. Then, slap
around the edge of the grille to seat the grille.
The grille is properly seated when it is flush with
the edge of the bezel.
Removal
Insert a pocketknife blade between the grille and
the bezel about 1/4" deep and then gently pry the
grille upwards. Do this in multiple places around
the circumference of the grille.
4

5
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
Usable Coverage Angle 140°
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, 1W & 16 ohms
100V: 32, 16, 8, 4, 2W & 16 ohms
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 12-5/16" dia. x 12" D
Vertical Clearance
Requirement Minimum 11" (From front of Mounting Surface)
Included Accessories Input Terminal Cover (2 Halves); (4) Screws;
(1) Snap-Lock Input Connector
Optional Accessories Tile Bridge Support Ring (TBCR)
Baffle Ring Finish & Color Textured Off-white
Listings CSA/UL Listed
*Half-Space Response, 16-ohm input
†Front panel, switch-selected.

50 Spring Street, Ramsey, NJ 07446, U.S.A.
Tel. [phone], Fax: [phone], www.bogen.com
The Orbit Ceiling Speaker, model OCS1, is warranted to be free from defects in materi-
al or workmanship for five (5) years from the date of sale to the original purchaser. Any
part of the product covered by this warranty that, with normal installation and use,
becomes defective will be repaired or replaced by Bogen, at our option, provided the
product is shipped insured and prepaid to: Bogen Factory Service Department, 50
Spring Street, Ramsey, NJ 07446, USA. The product will be returned to you freight pre-
paid. This warranty does not extend to any of our products that have been subjected to
abuse, misuse, improper storage, neglect, accident, improper installation or have been
modified or repaired or altered in any manner whatsoever, or where the serial number or
date code has been removed or defaced.
THE FOREGOING LIMITED WARRANTY IS BOGEN’S SOLE AND EXCLUSIVE WAR-
RANTY AND THE PURCHASER’S SOLE AND EXCLUSIVE REMEDY. BOGEN
MAKES NO OTHER WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED,
AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE ARE HEREBY DISCLAIMED AND EXCLUDED TO THE
MAXIMUM EXTENT ALLOWABLE BY LAW. Bogen's liability arising out of the manu-
facture, sale or supplying of products or their use or disposition, whether based upon
warranty, contract, tort or otherwise, shall be limited to the price of the product. In no
event shall Bogen be liable for special, incidental or consequential damages (including,
but not limited to, loss of profits, loss of data or loss of use damages) arising out of the
manufacture, sale or supplying of products, even if Bogen has been advised of the pos-
sibility of such damages or losses. Some States do not allow the exclusion or limitation
of incidental or consequential damages, so the above limitation or exclusion may not
apply to you. This warranty gives you specific legal rights, and you may also have other
rights which vary from State to State.
Products that are out of warranty will also be repaired by the Bogen Factory Service
Department -- same address as above or call 201-934-8500. The parts and labor
involved in these repairs are warranted for 90 days when repaired by the Bogen Factory
Service Department. All shipping charges in addition to parts and labor charges will be
at the owner's expense. All returns require a Return Authorization number.
8/2004
Accessories
TBCR (Tile Bridge Support Ring)
The TBCR is a combination tile bridge and support ring that assists in securing the
OCS1and in distributing the weight of the OCS1in various types of installations.
CK10 (Cable Kit, 10')
The CK10 is a 10-foot cable with one looped end and an adjustable cable clamp. It
is suitable for use as a safety cable.The CK10 is available in black, white, or silver.