JBL Professional Control 328C Coaxial Ceiling Loudspeaker Operational Guide
- June 4, 2024
- JBL Professional
Table of Contents
JBL Professional Control 328C Coaxial Ceiling Loudspeaker
Key Features
- Consistent 120° broadband pattern control covers an extremely large area. Shaped mounting baffle provides the pattern control of a 300 mm (12 in) horn from a 200 mm (8 in) driver.
- Components
- 200 mm (8 in) woofer with Kevlarre in forced cone and 50 mm (2 in) voice-coil.
- 25 mm (1″ exit) compression driver.
- Extraordinary clarity for speech and vocals with extended frequency response for music.
- 250 Watt power handling with very high sensitivity provides high SPL capability.
- Advanced high-slope crossover network for constant coverage and smooth, natural midrange.
- Clean, contemporary grille and optional back box available.
Applications
Control 328C and Control 328CT have been engineered from the ground up to deliver exceptional next-generation performance in a coaxial point source design ceiling loudspeaker. The combination of the low frequency cone and the shaped mounting baffle performs as a true 12 inch (300 mm) diameter waveguide for the high frequencies. A unique metal throat transitions seamlessly to the horn to eliminate high frequency beaming which is common among this category of speaker. The result is a coaxial speaker with wide, extremely consistent 120° coverage on a broadband basis.
Component features include a Kevlarre in forced low frequency cone for reliability, well-damped surround for smooth frequency response, high temperature voice coil and a reduced distortion design through saturated-gap magnet geometry. The high frequency driver features a pure titanium diaphragm for high sensitivity and long life, with diamond surround for resonance control and Ferro Fluid for increased power handling. The Control 328C and Control 328CT are easy to install.
The removable multi-pin locking connector, with secure screw-down terminals, allows for pre-wiring the input wires for easy clip-on convenience during installation. The clean, contemporary look of the optional MTC-RG6/8 round grille is designed to suit high-end venues, offering a simple, elegant appearance that fits into a wide variety of décors. The optional MTC-300BB8 one cubic foot back can is made of extra-thick 16 gauge steel and the top is lined with ½” medium density fiberboard.
The transformer version Control 328CT comes with a pre-attached top quality, low saturation 68 Watt multi-tap transformer for 70V/100V distributed speaker lines. To ensure long life and reliability, Control 328C/CT passes JBL’s 100-hour torture power test, the toughest standard in the industry.
Specifications
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Beamwidth
Directivity Index
Frequency Response
Conical Off-Axis Frequency Response
Dimensions
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User Support**
JBL Professional 8500 Balboa Boulevard, P.O. Box 2200 Northridge, California 91329 U.S.A.Harman International www.jblpro.com
Frequently Asked Questions
How many speakers for the ceiling do I need?****
The appropriate number of speakers As a general rule, use one pair of ceiling speakers in spaces larger than 3 m2, and two pairs in spaces larger than 5 m2 for a more well-balanced sound.
How are speakers in the ceiling connected?****
Easy Instructions for Connecting Ceiling Speakers to a Receiver
Disconnect everything.
Obtain your cables.
The wires’ ends should be cut.
Look at the speakers’ recommended wiring to see how it should be done.
Obtain your cables, and then attach them to the appropriate sockets.
Attach the sockets’ cables with locks.
How are speakers in the ceiling powered?****
Do ceiling speakers require a power outlet? No, ceiling speakers typically function as passive speakers, which means they lack internal amplifiers and are powered by speaker cables connected to an external amplifier. Each ceiling speaker is connected to the binding posts on the amplifier to do this.
How are speakers in ceilings measured?****
Take your measurements in inches for the speaker using a ruler or a tape measure. The biggest portion of the cone should be facing up while your speaker is erect. Measure the distance between the mounting frame’s two edges at the speaker’s widest point. So that you won’t forget it later, note the measurement.
To use my ceiling speakers, what do I need?****
An external amplifier that is wired via speaker cable to each ceiling speaker is required to power all of the ceiling speakers. For the ideal multi-room remedy.
Can I connect my TV to my ceiling speakers?****
Every TV will have some sort of connected audio output. It will most likely be a digital optical output presently. You can enjoy TV sound through your ceiling speaker system by connecting an analogue cable from your TV to the amplifier, plugging it in, and setting your TV to line output.
Can surround sound be played through ceiling speakers?****
If you want a more immersive audio experience, ceiling speakers are a terrific addition to a home theatre. Although they must be made specifically for ceilings, they are a great addition to a surround sound system.
Coaxial speakers: How do they operate?****
In professional audio, coaxial loudspeakers allow sound from two drivers to emanate from a single source. In comparison to loudspeaker enclosures featuring physically isolated drivers, this feature enables a larger field of listening to a synchronized summation of speaker drivers.
Where ceiling speakers should be placed?****
Dolby suggests employing four in-ceiling speakers with Atmos systems. Two pairs, one in front of and one behind your listening position. Mount the speaker(s), if your system only has room for one pair, just in front of where you’ll be listening. If your speaker placement isn’t ideal, don’t stress.
How far apart are ceiling speakers?****
For the sake of alignment, measure your distance from the other ceiling components. Keep the speakers at least eight feet apart as a general guideline. The size of the room will influence this.
What should I look for when buying ceiling speakers?****
Select a speaker with a tweeter that can be pointed precisely where you want
to hear it.
In places with a lot of humidity, pick speakers that can withstand dampness.
In-wall speakers that have been strategically positioned offer a front-row
musical listening experience.
Do my ceiling speakers need a subwoofer?****
Even if ceiling speakers are capable of producing all the bass and low-end frequencies, a subwoofer will be helpful in handling them. Additionally, it significantly improves the overall sound quality of your sound system.
Can speakers be mounted in the ceiling or the wall?****
It is possible to install in-ceiling speakers in walls, and they will sound quite similar to in-wall speakers. The size is the main distinction that you’ll see. Usually, in-wall speakers are bigger than in-ceiling speakers.
Do ceiling speakers perform better?****
Sound Performance In-wall speakers are frequently more potent and of greater quality as a result than in-ceiling speakers. When in-wall speakers are installed in numerous walls of a room or other space, they can add more sound dimensions than just a downward-firing one.
Are home ceiling speakers a good idea?****
Ceiling speakers may communicate exquisitely detailed music from overhead and even improve the surround sound of your speakers, despite their comparatively small size. Why not add a few to your home? Theaters even employ them to enhance the surround sound experience.