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First and foremost, an user manual of JBL 24C/CT should contain:
- informations concerning technical data of JBL 24C/CT
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- safety signs and mark certificates which confirm compatibility with appropriate standards
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Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of JBL 24C/CT alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of JBL 24C/CT, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the JBL service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of JBL 24C/CT.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the JBL 24C/CT item, and its use of respective accessory, as well as information concerning all the functions and facilities.
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Table of contents for the manual
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Page 1
Contr ol Contractor Ceiling Loudspeak er s Control 24C/CT Micr o and Control 24CT Micr oPlus Owner's Manual[...]
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Page 2
Product Description Product Feature Identification Installation Preparations Step-By-Step Installation and Wiring P ainting the Speaker Maintenance Contacting JBL T a ble of Contents 2 3 4 6 11 12 14 Thank you for purchasing JBL Control Contractor ceiling loudspeak ers . R ead through this manual to familiarize yourself with the features , applicat[...]
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Page 3
The JBL Control Contractor ceiling loudspeakers utilize innov ative design and materials to provide premium lev el perfor mance from compact in-ceiling speakers . CONTROL 24C MICR O - Most compact of the JBL ceiling speakers , the Control 24C Micro contains a 4" w oofer and a ¾" titanium-coated tweeter, pro viding high-fidelity sound ov [...]
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Page 4
Product F eatur e Identification (Control 24CT Micro Shown) Attachment Screw T weeter Woofer S teel Backcan Connector Block Rotating Mounting Ta b S train Relief Ti e Seismic T ab (Secondary Support) 3 Attachment point s for included or installer-provided strain-relief fittings. T uning Port[...]
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Page 5
Installation Preparations OPTION AL PRE-INST ALLATION BRACKETS The entire installation can be accomplished, if necessar y , without requiring access abov e the ceiling . Brac ketr y for use with either suspended ceilings or sheetrock ceilings is included. The speaker is held securely in place via mounting ears which loc k into place. IN MOST CASES [...]
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Page 6
2. The optional PLASTER-RING BRACKET (or "mud ring") is identical to the New Constr uction Bracket, with the addition of a circular offset, forming an edg e guide for sheet rock plastering . T he bracket has wings that attac h to the building str ucture. Sheet rock is typically either precut or cut with a rotary cutting tool. T he sheet r[...]
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Page 7
6 ALL included support brackets, C-plate and tile rails MUST be used when inst alling into suspended ceiling tiles. FOR SAFETY : IMPORT ANT TO USE BRACKETS 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 [...]
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Page 8
7 Figure 4: C-Brack et and Tile Rail P ositioning on Ceiling Tile Tile Rails: T he tile rails are designed to fit either standard 24-inch wide tiles or 600-mm wide tiles . T he tile rail pieces do NOT physically attac h to the T -g rid str uts. Instead, the inv er ted-V shape at the ends of the rails sit O VER the T -g rid str ut. During nor mal op[...]
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8 Control 24CT Micr o: 9 W 4 W 2 W 1 W 0 .5W Com 7 0V N.C. 9 W 4 W 2 W 1 W C om 1 00V Control 24CT Micr oPlus: N.C. N.C. 6W 12W 25W Com 70V N.C. N.C. 12W 25W N.C. Com 100V Control 24C Micro: +- Hookup Chart Hookup Chart F or Control 24CT Micro and the Control 24CT MicroPlus , connect the neg ativ e input to the "Common" ter minal and conn[...]
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Page 10
1 - Cable Tie - If using loose wire, this cable tie can secure the loose ends of wire that are connected to the ter minal block. The strap can be tightened by pulling on the loose end and then tightening the holding screw . 2 - Adjustable Metal Strap - This adjustable steel tie fitting is provided for those applica- tions where it can be utilized t[...]
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Page 11
10 Then tighten the mounting tabs by tur ning the screw CLOCKWISE until tight. T he first ¼ clockwise turn rotates the attachment tabs outward and the remaining turns tighten the tabs down onto the bac k of the ceiling surface. DO NO T O VERTIGHTEN . Figure 9: Tightening Mounting T abs Step 6 - Connect a Secondar y Suppor t Line to Seismic T a b -[...]
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Page 12
P ainting the Speaker The speaker's textured white finish complements most decors and does not need fur ther 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 [...]
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Page 13
These products are in compliance with the EMC Directive 89/336/EEC and Article 10 (1) of the directiv e. In compliance with T echnical R egulations EN50081-1 and EN50082-1. F or a copy of the model-specific CE Declaration of Confor mity , contact JBL at the address listed at the end of this manual. Maintenance No maintenance is required when instal[...]
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Page 15
W ar ranty & Contacting JBL These products are designed and backed b y JBL Professional, the world leader in sound rein- forcement. F or complete JBL warranty infor mation, to order replacement par ts or to ask for clarifications to this manual, contact JBL Professional. WITHIN THE UNITED ST ATES: OUTSIDE OF THE USA: Applications Depar tment, J[...]
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JBL Professional 8500 Balboa Blvd, P .O. Box 2200 Northridge, CA 91329 U.S.A. A Harman International Comp any MAN_C24MICRO Revision D[...]