Results 1 to 9 of 9

Thread: JBL CBT series

  1. #1
    JBL 4645
    Guest

    JBL CBT series

    New JBL newest the (CBT) Constant Beamwidth Technology

    I like it already but I doubt I’ve got the money for such yet another fine JBL product how much?:dont-know

    Fire your brains by reading more about CBT in links.

    CBT series
    JBL Constant Beamwidth Technology
    http://www.jblpro.com/catalog/general/ProductFamily.aspx?FId=89&MId=2

    CBT Brochure
    http://www.jblpro.com/catalog/support/getfile.aspx?doctype=3&docid=1389

    Quote Originally Posted by JBL 4645 View Post
    Constant Beamwidth Technology™ CBT Series resets the standards for directivity and versatility in passive column loudspeakers.

    ORLANDO, Florida – Offering unprecedented levels of directivity control, sonic fidelity and affordability, JBL Professional today introduced the CBT Series of passive line array columns, featuring JBL’s patent-pending Constant Beamwidth Technology™ circuitry, a breakthrough in pattern control that provides remarkably consistent constant directivity coverage and superb audio clarity, even in difficult acoustical environments.

    “With the CBT Series, JBL is improving upon a number of challenges customers have typically faced with traditional passive columns, which causes the listening area to be covered inconsistently and every listener hearing a different sound character, including inconsistent coverage angles at every frequency, frequency response that changes considerably with distance, and out-of-coverage lobes that contribute to a destructive reverberant field,” said Rick Kamlet, Senior Director, Commercial Installed Sound, JBL Professional. “All these factors result in the listening area being covered inconsistently and every listener hearing a different sound character. After years of research by JBL engineers, the CBT Series, with Constant Beamwidth Technology, represents a new benchmark in performance and versatility for passive column loudspeakers, providing not only constant directivity, but also adjustable coverage control, full-fidelity sound quality, and one model that provides a very versatile asymmetrical pattern for more consistent front-to-back sound levels within the room while reducing reflections from the back wall. These features, along with high output levels, make the CBT Series a great choice not just for traditional column applications, but also for projects where larger point-andshoot speakers would normally be utilized.”

    The coverage pattern of the CBT models can be adjusted—with a simple switch—between Broad Mode (designed for mid-throw situations) and Narrow Mode (for long-throw applications). This versatility allows the CBT’s to meet the requirements of a broad range of applications. In addition, the CBT speakers provide Dynamic SonicGuard overload protection circuitry, which reduces distortion at high drive levels, along with user variable voicing which allows selecting a flat frequency response or a midrange presence peak for especially clear speech intelligibility.

    The CBT 50LA is a very compact 50 cm high column that utilizes a straight line of eight 2-inch drivers, while the taller CBT 100 LA is a straight 100 cm high column utilizing 16 2” drivers and handles 325 Watts continuous pink noise for high output levels. Combined with Constant Beamwidth Technology circuitry, both provide constant directivity coverage. Both also contain low-saturation transformers, so they can be used on 70V/100V distributed speaker lines or as low impedance speakers.

    The J-shaped CBT 70J is a 2-way coaxial line array utilizing 16 soft dome tweeters and four high power 5-inch woofers at a 70 cm height. The Jshape of the array works in conjunction with the Constant Beamwidth Technology circuitry to provide asymmetrical coverage similar to that of expensive line arrays commonly used in concert systems. The column’s top half projects highly concentrated sound toward the back of the venue, while the bottom half down-fills a broader, less concentrated sound to the front of the venue, resulting in more consistent sound levels from front to back.

    This 500W system contains a pattern control switch for either 45 or 25 degrees vertical coverage.

    The CBT 70JE is an extension cabinet for the 70J, further extending the pattern control of the CBT 70J by doubling its height, which lowers the frequency to which the speaker holds a consistent pattern of coverage, and doubling the power handling. The 70JE also increases the bass capability and extends the low-frequency response of the system to 1000 Watts continuous pink noise. The selectable vertical coverage, music/speech settings, the option to add an extension for bass and pattern control, asymmetrical vertical coverage, high output, and wide bandwidth makes the CBT70J an extremely versatile loudspeaker that fits into a wide variety of applications.

    Despite the advanced features and performance built into the CBT Series, they are extremely easy to use, encompassing a new level of user-friendliness that makes them very straightforward to design into everyday projects. The CBT models can be installed either indoors or outdoors and the thin and sleek design is so unobtrusive that they almost vanish into the décor.

    The wide variety of applications for the CBT Series include performance spaces, transit centers, lecture halls, multi-purpose rooms, board/meeting rooms, retail stores, courtrooms, theme parks, houses of worship, fellowship halls, movie theater lobbies, cinema surround, audio supporting video, race tracks, and many others.


    JBL is a unit of Harman International Industries, Incorporated (www.harman.com). Harman International Industries, Incorporated designs, manufactures and markets a wide range of audio and infotainment products for the automotive, consumer and professional markets. Harman International maintains a strong presence in the Americas, Europe and Asia, and employs more than 11,000 people worldwide. The Harman International family of brands includes AKG®, Audioaccess®, Becker®, BSS®, Crown®, dbx®, DigiTech®, Pictured, from left: Paul Bauman, JBL; Bryan Olson and Mark Dittmar, Firehouse Productions; and Brian Divine, Crown Audio. Harman Kardon®, Infinity®, JBL®, Lexicon®, Mark Levinson®, Revel®, QNX®, Soundcraft® and Studer®. Harman International's stock is traded on the New York Stock Exchange under the symbol "NYSE: HAR."


    Press Release PDF File
    Copyright © 2009 JBL Professional
    All Rights Reserved
    Attached Images Attached Images  

  2. #2
    Maron Horonzakz
    Guest
    Didnt ElectroVoice have something like that 40 years ago ????

  3. #3
    Obsolete
    Join Date
    Apr 2003
    Location
    NLA
    Posts
    12,193
    Quote Originally Posted by Maron Horonzakz View Post
    Didnt ElectroVoice have something like that 40 years ago ????
    Yeah but people didn't hear as well back then so it wasn't applicable.

  4. #4
    Maron Horonzakz
    Guest
    Yes but i got layed at Woodstock. What where you doing ???

  5. #5
    Senior Member jcrobso's Avatar
    Join Date
    Oct 2008
    Location
    Chicago
    Posts
    1,099

    Back in the mid 1960's column speakers were all the rage.

    The Sure vocal master was the hottest thing in PA. Column speakers have a wide angle coverage, but then to be a short throw speaker. They are specialty speaker not a general purpose one. Most of the time were use incorrectly. They were used at the narrow end of a long room, not the correct way to use them. John

  6. #6
    Junior Member
    Join Date
    Jul 2010
    Location
    Orlando, Florida
    Posts
    1

    CBT History 101

    Good Afternoon Gentlemen,
    Sorry for replying to a now-older thread, but I wanted to direct you to my father's website (Don Keele) to his CBT page which explains what makes the CBT different from other "column" style line arrays. Don Keele is the former JBL engineer who is the inventor of several patents under JBL using the term "CBT" Don Keele is widely known and respected for being the father of the CD (constant directivety) or Bi-radial horn with both Electrovoice and JBL as mentioned on this website. http://www.audioheritage.org/html/pr...bl/4430-35.htm

    I just finished adding his CBT page to the site, because he finished some new DIY designs and was demonstrating them at the Midwest Audio Fest this last weekend.

    Here is the page:

    http://www.xlrtechs.com/dbkeele.com/CBT.php

    On the left is an image of the system dubbed CBT 36 because of the 36degree arc.
    This is ground-breaking technology now ten years in the making. They must be heard to be believed!

    Kevin Keele

  7. #7
    Senior Member spkrman57's Avatar
    Join Date
    Feb 2005
    Location
    Columbus, Ohio
    Posts
    2,018

    Thank you Kevin!

    It's always nice to have information from the original source relayed to us!

    Regards, Ron
    JBL Pro for home use!

  8. #8
    Senior Member
    Join Date
    Feb 2004
    Location
    Central Coast California
    Posts
    9,042
    Thanks for the info and the link.
    Out.

  9. #9
    Junior Member
    Join Date
    Jul 2010
    Location
    Los Angeles
    Posts
    5
    Don really has this stuff working great. His private projects on this are really much better that the few specific products that JBL Pro has come out with.

    The potential here is enormous. These can sound really fantastic. All of the dynamics of big horns, with the imaging of some of the great Hi-Fi systems that are out there.

    Both the half (ground plane) CBT and the full CBT can provide really unique solutions for a variety of applications. Subtle details, clarity and a really wide sound stage make these phenomenal loudspeakers.

    Don has a pretty good track record. Believe me I've heard these and they really do deliver.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. ...ever get an ice pick to the forehead?
    By robertbartsch in forum General Audio Discussion
    Replies: 53
    Last Post: 07-07-2009, 05:12 PM
  2. JBL Woofers Series Connection.
    By vifa32144 in forum Lansing Product Technical Help
    Replies: 1
    Last Post: 08-21-2004, 12:50 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •