JBL Control 24C Micro Manuel utilisateur

UBI..

PROFESSIONAL

ControlContractor

Ceiling Loudspeakers

Owner's Manual

RevE

Table

Contents

Product Description......................................................................................... 2

Product Feature Identification.........................

............................................

Installation Preparations...................

............................................................. 4

Step-By-Step Installation and Wiring............................................................. 6

Painting the Speaker......................................................................................

Safety Agency Compliance...........................................................................

Maintenance..................................................................................................

Replacement Parts......................................................................................... 17

Contacting JBL ..............................

.............................................................

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

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

the

JBL

ceiling speakers, the

Control24C

contains a coaxially mounted

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

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

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

y system, resulting in full-fidelity high

level sound. The optional Control 19CST includes a special subwoofer-band transformer for

use

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

Installation Preparations

The entire installation can be accomplished,

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

IN MOST CASES, NO BRACKETS OTHER THAN THE ONES INCLUDED WITH

YOUR SPEAKER ARE REQUIRED. Everything needed for most installations

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

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

pre-installation brackets are available from JBL Professional as optional accessories:

1) The optional NEW-CONSTRUCTION BRACKET is made

flat sheetmetal, with

wings to attach to the building structure. Holes are drilled for nails

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

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

the pla:stefri:ng cfrcle

a guide. The sheet rock hole is then plastered (or

"mudded")

upto

ri.,n:gJt)

createa seamless cutout.

' .

. . ' . " ;· :

--=~--~

;

; >

;

. '

Figure 2:

Optional PlasterRing Bracket

Table

New

Construction

Brackets

New

Model

Construction

Plaster-R

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

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)

STEP-BY

-STEP

INSTALLATION

AND

WIRING

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

practical.

However, in some cases it may be easier with removable ceiling tiles to access from both the

top and bottom

the ceiling tile during various phases

the installation.

Step 1

-Cut

the Hole. Cutout the hole size either

tracing the cardboard cutout template

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

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,

necessary.

FOR

SAFETY:

IMPORTANT

USE

BRACKETS

ALL

included

support

brackets

C-plate

and

tile

rails

-- MUST

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

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

the rails

sit OVERthe T-grid strut. During normal operation, the rails are supported

the edge

the tile.

the

unlikely even that the tile comes out or falls apart, the ends

the supportrails are designed

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

the

ceiling materials

structure. Depending on the character

the ceiling tile and structure, the installer might

need to place neoprene

other dampening material under the tile rails

the edges

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

the tile as

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

the back side

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/

inch), inserting the bare end

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

Connecting Wires to

Removeable Locking Connector

Guide to the Pins for Connection --

The removable locking input connector contains 4

terminals,

marked

the connector. The

functions are listed

the label located

the terminal cover plate.

Figure 6: ConnectorPins

Pins 2 & 3 are

the"+"

and"-"

inputs

the loudspeaker. Pins 2 & 3 are looped to pins 1

respectively (Pin 1 connects

and

3 connects to

4) inside

the

speaker.

Pins 1 & 4 are intended

loop-through connections to subsequent loudspeakers. There

are

two

possible hookup schemes for connecting subsequent speakers, determined

the

desired result from the circuit whenever this

speaker's

connector gets disconnected during

troubleshooting:

Paralleling Input Terminals

--Connect

the

wire pair

the subsequent speaker to

pins 2 & 3 (in parallel

with

the input wire pair). Whenev

the connector is pulled out

the speaker for troubleshooting, subsequent speakers will stay connected. This can

useful during troubleshooting to

able to disconnect a single loudspeaker at a time.

In this hookup scheme,

wires get connected to pins 1 & 4.

Figure

Paralleling Input Terminals

Figure 8:

From Amplifier or

Previous Speaker

Parallel

System

Hookup Diagram

Subsequent

Speakers

,------.

,....------,

.--------,

,---------<+-

+ -

Pow

Amp

lifier Speak

1 Speaker 2 Soeaker 3

Subseque

Speakers

Using Loop-Through Terminals (Pins 1

--By

connecting the wire pair

the

subsequent speaker to pins 1

4, then all subsequent speakers will

disconnected

when this speaker's connector is disconnected during for troubleshooting,. This can

be useful as a way to isolate problems to a section

the distributed line while leaving

the wires attached to the connector.

Figure 9:

Terminals

f~~"l-rhrough

~~W#i~·~

From Amplifier

- -

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.

Subsequent

Speakers

Step 4 - Plug connector into connector socket in the speaker's terminal cup.

Figure

Plugging ConnectorInto

ConnectorSocket

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