JBL Control 24C Micro User manual

UBI..
PROFESSIONAL
ControlContractor
Ceiling Loudspeakers
Owner's Manual
RevE

Table of Contents
Product Description......................................................................................... 2
Product Feature Identification.........................
.. ............................................ .. 3
Installation Preparations...................
.. ............................................................. 4
Step-By-Step Installation and Wiring............................................................. 6
Painting the Speaker......................................................................................
15
Safety Agency Compliance........................................................................... 16
Maintenance.................................................................................................. 16
Replacement Parts......................................................................................... 17
Contacting JBL ..............................
.. ............................................................. 17
1

Thank you for purchasing JBL Control Contractor ceiling loudspeakers.
Read through this manual to familiarize yourselfwith the features, applications and precautions
before you use these products.
Product Descriptions
2
The
JBL
Control Contractor ceiling loudspeakers utilize innovative design and materials to
provide premium level performance from compact in-ceiling speakers.
CONTROL 24C
&
24CT-
Most compact
of
the
JBL
ceiling speakers, the
Control24C
contains a coaxially mounted
4"
woofer and %"titanium-coated tweeter, providing
high-fidelity full-range sound over an extremely wide coverage area.
The
optional Control
24CT
includes a multi-tap transformer for 70V
or
1
OOV
systems.
CONTROL 26C
&
26CT-
The
Control26C
is a powerhouse ceiling speaker containing a
coaxially mounted 6.5" woofer and 3
14"
titanium-coated tweeter, able to deliver maximum
sound level over a wide coverage area. The optional Control
26CT
includes a multitap
transformer for a 70V
or
1
OOV
line distribution system.
CONTROL 19CS
&
19CST
Subwoofer-
The
unique Nested Chamber™ design and Linear
DynamicsTM port allows powerful low-frequency reinforcement from a compact in-ceiling
enclosure. The Control 19CS is an ideal addition to
an
y system, resulting in full-fidelity high
level sound. The optional Control 19CST includes a special subwoofer-band transformer for
use
on
70V or 1
OOV
line distribution systems.

Product Feature Identification
(Control
24C Shown)
-+----.:steel
Backcan
AttachmentScrews
Strain Relief Fitting
Terminal Cover Plate Assembly
Rotating Mounting Tabs
JBL
Logo
3

Installation Preparations
The entire installation can be accomplished, if necessary, without requiring access above the
ceiling. Bracketry for use with either suspended ceilings or sheetrock ceilings is included.
The speakeris held securely in place via mounting ears which lock into place. Inputs are
attached to a removable locking connector (included) which can be prewired before installing
the speaker for ultra-fast snap-on installation.
OPTIONAL PRE-INSTALLATION BRACKETS
4
IN MOST CASES, NO BRACKETS OTHER THAN THE ONES INCLUDED WITH
YOUR SPEAKER ARE REQUIRED. Everything needed for most installations
of these
loudspeakers is provided with your Control Contractor ceiling speaker.
However, a particular procedure that is sometimes used for installation into sheet rock
(typically gypsum board) can be facilitated by the use
of JBL's optional preinstallation
brackets before the sheetrock is installed. The preinstallation bracket provides a bracket to
which wiring can be tied behind the sheetrock and it can function as a cutout template when
many cutouts are to be made in a production-line style installation. Two types
of
pre-installation brackets are available from JBL Professional as optional accessories:
1) The optional NEW-CONSTRUCTION BRACKET is made
of flat sheetmetal, with
wings to attach to the building structure. Holes are drilled for nails
or screws at 16 inches
(406 mm) and 24 inches (610 mm) on-center. Additional holes can be drilled by the installer
at other spacings up to a maximum of24-3/4 inches (630 mm) apart. Sheet rock installs over
the bracket, and the bracket provides a template for blind cutout
of the hole in the sheet rock.
The sheet rock is typically cut with a router-type cutting tool, using the bracket ring as a
cutout guide.
Figure 1:
Optional
New -Construction Bracket

2) The optional PLASTER-RING BRACKET (or"mudring") contains a circular offset,
forminga edge guide for
$h~~ : f.9.C~ plastering. The bracket has wingsthat attach to the
building structure.
Sheetfocki ~ sijpi~aflyeitherprecut or cut with a rotary cutting tool using
theoutside
of the pla:stefri:ng cfrcle as a guide. The sheet rock hole is then plastered (or
"mudded")
upto $e ri.,n:gJt) createa seamless cutout.
' . .. . . ' . " ;· : --=~--~ ; ;: ! , ;: -_ ; > ~ ; . '
Figure 2:
Optional PlasterRing Bracket
Table 1: New Construction Brackets
New
Model Construction Plaster-R i ng
Bracket Bracket
Control 24C & 24CT MTC-24NC MTC-24MR
Control 26C & 26CT MTC-26NC MTC-26MR
Control 19CS & 19CST MTC-19NC MTC-19MR
USING INCLUDED C-BRACKET WITH SHEETROCK
For most installations, the INCLUDED C-shaped backing plate to provides adequate
reinforcement to the ceiling material, spreading out the clamping force from the tab clamps.
CUTOUT SIZES
Packaged with the speakers are cardboardcutout templates for scribing the cutout hole onto
your ceiling surface.
Table 2: Cutout Sizes
Model Cutout Size
(diameter)
Control 24C & 24CT 165 mm (6.5 in)
Control 26C & 26CT 220 mm (8.75 in)
Control 19CS & 19CST 305 mm (12.0 in)
5

STEP-BY -STEP
INSTALLATION AND WIRING
6
The installation system has been designed so that the entire installation can be accomplished
from beneath the ceiling, for instances when access above the tile is not possible
or practical.
However, in some cases it may be easier with removable ceiling tiles to access from both the
top and bottom
of the ceiling tile during various phases of the installation.
Step 1 -Cut the Hole. Cutout the hole size either by tracing the cardboard cutout template
or with a circular cutter set to the cutout sizes listed above. Pull the wiring through the
cutout hole.
Figure 3:
Hole Cutout
Step 2 - Insert Backing Hardware Through the Hole. Packaged with the speakers are two
types
of backing hardware - a C-shaped backing-plate bracket and two tile rails.
Suspended Ceilings -Insert the C-plate through the hole cut in the ceiling tile. Place
the C-plate around the hole with the tabs located as shown on Figure 4. Insert the tile rails
through the cut hole inthe ceiling tile. Snap the two rails into the two tabs in the C-plate
and align the rails so that the ends extend OVERthe T-channel grid on the side
ofthe tile.
Secure the rails onto the C-bracket tabs by inserting a screwthough each tab into the rail.
This can all be accomplished from below the ceiling tile,
if necessary.
FOR SAFETY: IMPORTANT TO USE BRACKETS
ALL included support brackets - C-plate and tile rails -- MUST be used when
installing into suspended ceiling tiles .

Figure 4:
C-Bracket
and
Tile Rail
Positioning on Ceiling Tile
Tile Rails: The tile rails are designed to fit either standard 24-inch wide tiles
or
600-mm wide tiles. The tile
rail pieces do
NOT
physically attach to the T-grid struts. Instead, the inverted-V shape at the ends
of
the rails
sit OVERthe T-grid strut. During normal operation, the rails are supported
by
the edge
of
the tile.
In
the
unlikely even that the tile comes out or falls apart, the ends
of
the supportrails are designed
to
catch onto the
T-grid, providing secure support to hold the loudspeaker assembly in place.
Vibration Reduction: These loudspeakers can generate substantial vibration, which can cause buzzing
of
the
ceiling materials
or
structure. Depending on the character
of
the ceiling tile and structure, the installer might
need to place neoprene
or
other dampening material under the tile rails
or
the edges
of
the tiles to eliminate
rattles.
Cutout Placement: The tile rails are pre-punched with attachment holes along their length. Placement is not
limited to the center
of
the tile as
is
the case with many other tile rail support systems.
Non-Suspended Ceiling
Types-
The C-bracket can be optionally used by itselfto shore
up the ceiling material and to spread out the clamping force from the tab clamps. Insert
the C-plate through the cut hole in the ceiling and place it
on
the back side
of
the hole
before inserting the speaker.
Step 3 -Connect the Wiring to the Removable Locking
Connector-
Connect the
wiring to the removable locking connector that is INCLUDED with the speaker by stripping
the insulation back about 5 mm (about 3/
16
inch), inserting the bare end
of
wire into the
connector and screwing down the hold-down screw until tight using a small flatblade
screwdriver. Tighten any unused screws to avoid vibration.
Figure
5:
Connecting Wires to
Removeable Locking Connector
7

8
Guide to the Pins for Connection --
The removable locking input connector contains 4
terminals,
as
marked
on
the connector. The
pin
functions are listed
on
the label located
on
the terminal cover plate.
Figure 6: ConnectorPins
Pins 2 & 3 are
the"+"
and"-"
inputs
to
the loudspeaker. Pins 2 & 3 are looped to pins 1
&
4,
respectively (Pin 1 connects
to
Pin
2
and
Pin
3 connects to
Pin
4) inside
the
speaker.
Pins 1 & 4 are intended
as
loop-through connections to subsequent loudspeakers. There
are
two
possible hookup schemes for connecting subsequent speakers, determined
by
the
desired result from the circuit whenever this
speaker's
connector gets disconnected during
troubleshooting:
Paralleling Input Terminals
--Connect
the
wire pair
of
the subsequent speaker to
pins 2 & 3 (in parallel
with
the input wire pair). Whenev
er
the connector is pulled out
of
the speaker for troubleshooting, subsequent speakers will stay connected. This can
be
useful during troubleshooting to
be
able to disconnect a single loudspeaker at a time.
In this hookup scheme,
no
wires get connected to pins 1 & 4.
Figure
7:
Paralleling Input Terminals
Figure 8:
From Amplifier or
Previous Speaker
Parallel
System
Hookup Diagram
II
~~
+
To
Subsequent
Speakers
,------.
,....------,
.--------,
,---------<+-
To
+ -
Pow
er
Amp
lifier Speak
er
1 Speaker 2 Soeaker 3
Subseque
nt
Speakers

Using Loop-Through Terminals (Pins 1
&
4)
--By
connecting the wire pair
of
the
subsequent speaker to pins 1
&
4, then all subsequent speakers will
be
disconnected
when this speaker's connector is disconnected during for troubleshooting,. This can
be useful as a way to isolate problems to a section
of
the distributed line while leaving
the wires attached to the connector.
Figure 9:
Terminals
f~~"l-rhrough
~~W#i~·~
From Amplifier
or
~
-
- -
To
Subsequent
Previous Speaker _
+
Soeakers
Figure 10:
Loop-Through
System Hookup
Diagram
+ -
PowerAmplifier Speaker 1 Speaker 2 Speaker 3
+
Choose whichever hookup pattern accommodates your installation best.
To
Subsequent
Speakers
Step 4 - Plug connector into connector socket in the speaker's terminal cup.
Figure
11
:
Plugging ConnectorInto
ConnectorSocket
9

10
Step 5 -Tighten the Strain ReliefFitting
&
Close the Terminal Cover
First, remove the horizontal screw indicated
in
the drawing below.
Figure 12:
Opening the
Strain-ReliefFitting
Next, loosen the screws holding the fitting's sliding pieces onto the input-terminal cover
by about a
half
turn. Run the wires through the opening in the fitting.
Figure 13:
Running Wires
Through Opening
In Strain
Relief
Fitting

The strain relief can be tightened in two ways, choose whichever is best for your
application:
a) Tightening onto plenum cable or bare wire-- Slide the wiring through the strain
relieffitting on the terminal cover plate. In the case
of bare wire and plenum cable it is
often possible to provide acceptable strain reliefforce
by simply tightening the screws
holding the sliding strain reliefonto the terminal cover plate. To achieve a tight fit, use
a clamping mechanism (such as slipjoint pliers) to hold the strainreliefpieces together
while tightening the hold-down screws.
It is optional to reinsert the horizontal screw that was previously removed and to tighten
the two horizontal screws, clamping the wire securely between them.
Figure 14:
Tightening Fitting
Onto Plenum Cable (shown)
Or Bare Wire
11

12
b) Tightening onto flexible or hard conduit- The supplied fitting accommodates up
to 3/8 inch (9.5mm) flexible conduit. Slide the wiring through the strain relieffitting
on the terminal cover plate. Insert the conduit into the strain relieffitting. Reinsert
the horizontal screw that was previously removed. Use the two horizontal screws that
clamp the fitting together, clamping the conduit securely between them.
Figure 15:
Tightening Fitting
Onto Conduit
Using an Alternate Fitting- The existing strain relieffitting accommodates many
common fitting requirements. Sometimes, alternate fittings are required, such as for
larger diameter conduit orto meet specific code requirements.
In these cases, the existing fitting canbe easily replaced with a number
of available
off-the-shelffittings. Simply remove the existing fitting by unscrewing the two
hold-down screws, exposing a 7/8 inch (22mm) knockout hole. Install the alternate
fitting.
Caution:
Always use the proper fitting in accordance with your area's
building codes and regulations.
Close the Terminal Cover- Close the hinged terminal cover and secure it in place with the
hold-down screw.

Step 6 -Insert the Speaker Into the Ceiling and Tighten.
Insert the speaker into the ceiling as far as it goes, until the front baffle rim touches the
ceiling.
• .
..
.
.
Figure 16:
Inserting Speaker
Into Ceiling
Turn the attachment screws to tighten the mounting tabs, by using the following directions:
IMPORTANT-- For each attachme nt screw, FIRST tum 'iS tum COUNTER-CLOCKWISE
to release the mounting tab from its guide.
Then tighten the mounting tabs by turning the screw CLOCKWISE until tight. The first
'l4
clockwise turn rotates the attachment tabs outward and the remaining turns tighten the tabs
down onto the back
of the ceiling surface. DO NOT OVERTIGHTEN.
Figure 17:
Tightening Mounting Tabs
Table 3: Number of Attachment Screws, by Model
13

14
Model Number
of
Attachment
Sere\\~
Control 24C
&
24CT 3 screws
Control 26C
&
26CT
4
screws
Controll9CS
&
19CST
5
screws
Step 6 - Connect a Secondary
Support
Line to Seismic
Tab
-A
tab is provided on the
back
of
each speaker for connection to a independent secondary support point. Some
construction codes require using this secondary support point, which requires connecting a
support line
to
a separate secure support point. Consult construction codes in your region.
IMPORTANT:
Control Contractor ceiling speakers can generate substantial vibration . It is
HIGHLY RECOMMENDED to use the seismic tab as a secondary support point in
case the ceiling tile
or
structure breaks.
Step 7
for
"T"
Versions Only:
Adjust
Tap
Selector-
On T-version models (Control
24CT, 26CT and 19CST) the tap selector switch is located on the front baffle. Adjust the tap
setting before inserting the grille. In some installations it is advisable
to
leave the grilles
OFF until final adjustment
of
the taps for the system.
Figure
18:
Tap Selector
(Shown: Contro/24CT)

Step 8- Insert the Grille -Consider which direction the logo is facing and press the grille
into place until the front of the grille is flush with the rim. Make sure grille is securely
seated to prevent it from vibrating loose and falling.
Removing the Grille-- The grille presents a tight fit in order to make sure that it won't
fall out, even with high vibrations that can be produced by these speakers.
If you need to
remove the grille, it is easiest to do so by inserting 2 pointed objects (such as pushpins)
into 2 nearby holes
in the grille, presenting slow even pressure to pull down on the grille
until that section
of the grille comes out approximately 6 mm (1 /4 inch). Work your way
around the grille, loosening a section at a time until the grille comes out.
Painting the Speaker
The speaker's textured white finish complements most decor and does not need further finishing.
Where the interior design requires it, these speakers are easy to paint.
The rim can
be painted before installation or in cases where the rim needs to be finished along
with the ceiling, the speaker rim can be painted after attaching into the ceiling.
Type of Paint- The speaker's polystyrene rim accepts almost any type of latex or oil based
paint. Two coats are recommended.
Painting Process- For best results, it is recommended to use the following procedure:
• Clean the rim and grille with a light solvent such as mineral spirits by rubbing the item with
a lightly dampened cloth. Do not, however, use abrasives such as sandpaper
or steel wool.
Nor should you use gasoline, kerosene, acetone, MEK, paint thinner, harsh detergents or
other chemicals. Use of these cleaners may result in permanent damage to the enclosure.
• After cleaning, apply two
or more two thin coats of either latex or oil-based paints. Latex
paint will adhere better
if an oil-based primer is used first. Application can be made by
rolling, brushing or spraying.
Painting the Speaker Along With the Ceiling- Insert the clear plastic paint shield into the
front
of the speaker to mask the drivers and internal baffle, paint the speaker, then remove the
shield.
Painting the Grille- Painting the grille requires removal of the logo and the internal grille
cloth, they spray painting.
If the grille is rolled or brush painted, the mesh may become
clogged with paint and poor sound quality
may result. Replace the internal grille cloth and
JBL logo.
15

SafetyAgency Compliance
c@us
LISTED
87232
I5CM
General Signaling Equipment
Speaker
UL-2043 Fire Tests for Heat and Visible Smoke Release for Discrete Products and their
Accessories Installed in Air Handling Spaces,
NFPA-70 National Electric Code, Article
300-22(C), and NFPA-90A Installation
of Air Conditioning and Ventilation Systems, Section
2-3.10.1 (a), Exception 3. Listed UL1480 Speakers for Fire Protective Signaling Systems, and
CSA C22.2 No. 205, Signal Equipment. Forinstallation instructions refer to this JBL manual
#CEILING SPKR MANUAL, Rev D.
SUITABLE FOR USE IN AIR HANDLING SPACES.
<E
These products are in compliance with the EMC Directive 89/336/EEC and Article 10 (1) of the
directive. In compliance with Technical Regulations EN50081-1 and EN50082-1. For a copy
ofthe model-specific CE Declaration of Conformity, contact JBL at the address listed at the end
of this manual.
Maintenance
No maintenance is required when installed in accordance with installation and wiring guidelines
described in this manual.
16

Replacement
Parts
There are no user serviceable parts inside these speakers. The following replacement parts are for
reference only. Refer servicing to
an
authorized JBL Service Center. For the name
of
an
authorized Service Center in your area, contact JBL Professional
at
the address listed below.
Driver (Speaker)
Transformer
Crossover
Network
Fuse (internal)
Protection Lamp
Input Connector
Mounting Tab
Control Control
24C 24CT
124-13000-00
None 562-
00035-00
129- 129-
20046-00 20045-00
SK2
Control Control Control Control
26C 26CT 19CS 19CST
124-16000-00 124-58000-00
None 562- none 562-
00036-00 00037-00
129-20047 129- 129- 129-
-00 20048-00 10037-00 10038-00
453-80000-00
SK3
424-00092-00
885-00050-00
Warranty & Contacting
JBL
These products are designed and backed
by
JBL Professional, the world leader in sound
reinforcement.
For
complete JBL warranty information, to order replacement parts
or
to ask for
clarifications to this manual, contact
JBL
Professional:
WITHIN THE UNITED STATES: Contact the Applications Dept, JBL Professional, PO Box
2200, 8500 Balboa Blvd, Northridge CA 91329 USA. In the USA you may call
Mondaythrough Fiday
8:00am
to
5:00pm
Pacific Coast Time [phone].
IN OTHERAREAS THROUGHOUT THE WORLD: Contact the JBL Professional
Distributor in your country.
A list
of
JBL Professional Distributors and U.S. Service Centers can be attained from the JBL
Professional WWW.JBLPRO.COM website.
17

II
•a·•
,,,.,.,,.,~,.,,
JBL Professional
8500 Balboa Blvd, P.O. Box 2200
Northridge, CA 91329 U.S.
A.
H
A
Harman
International
Company
CEILING SPKR MANUAL
Rev E