The Official Website of D.B. Keele, Jr. | Loudspeaker Engineering & CBT Arrays Inventor | Audio Magazine Reviewer

Celebrate Don Keele’s 85th Birthday 🎉

This November 2025, D.B. “Don” Keele Jr.—a pioneer in loudspeaker engineering and acoustics—will be celebrating his 85th birthday! Don’s work has influenced generations of engineers, designers, musicians, and audio enthusiasts around the world. From groundbreaking research on constant-directivity horns to his extensive reviews for Audio Magazine, and his most recent CBT loudspeaker invention, his contributions have left a lasting impact on the field of sound reproduction.

We invite you to help mark this special occasion by leaving a personal birthday message for Don. Share your thoughts, memories, or let him know how his work has inspired or influenced you. Whether you’ve known him personally, followed his career, or benefited from his innovations, your words will make this milestone celebration truly meaningful.


How to Leave a Birthday Greeting

  1. Fill out the form below with your name and email address.
    (Your email will not be published; it is only used for registration.)
  2. Write your message in the comment box. This could be:
    • A simple birthday wish 🎂
    • A note of thanks for Don’s contributions to audio engineering 🎶
    • A personal memory or story about how his work impacted you
  3. Submit your comment. Please note:
    • All comments will be reviewed before posting.
    • Your message may not appear right away, but it will be published once approved.

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55 responses to “Happy Birthday Don!”

  1. Yuri Halberstadt Avatar
    Yuri Halberstadt

    Deer Don and mr D.B. Keele, congratulations, you rock (both)!

    A bit late perhaps, sorry about that, but i’m recently entering all kinds of discussions on audio forums, in search of what i still consider the holy grail of (home) audio: Constant Directivity. And then your son broke in on ASReview! He made us aware of this site, and now i realise i was here before.

    Because you are one of the giants who’s shoulders everyone in search of CD stands on. Together with Siggy, Floyd and numerous others of course, but your CBT’s show insights about which hardly any paper was to be found at the time you presented them.

    I’m now searching for solutions to the open baffle dipole line array challenges, which are plentiful, but many of which can be reasonably mitigated tx to you, and some of which i’ll be happy to have sleepless nights about.

    Your website will definitely be one of the sources i am gonna spell to the last letter to find everything relevant to my project. If it succeeds i’ll be mentioning you, because your brilliant insights are indispensable for the acoustics of my design experiments.

    Thank you thank you thank you, may you enjoy many healthy and happy years while we’re both still here.

    Warm regards from Amsterdam,

    Yuri Halberstadt

    1. kevinkeele Avatar

      Thank you for your reply, Yuri! Don and D. B. are the same. Don is his nickname, for he only has a first initial on his birth certificate. I used to have a snippet explaining his name on the old site. I need to re-add it to this one.

  2. Sebastian Godoy Avatar

    You are a great inspiration. Regards from Chile.

  3. Gerry Hudson Avatar
    Gerry Hudson

    Hey DB happy belated birthday. The big 85. I was remembering those days back when we were commuting to college at Cal Poly. I also remember the time we were visiting Maurita and Judy at the beach and you were in the bathroom and started laughing. We were curious and you said you had told yourself a joke. 🙂 Still makes me smile.

Don't worry about people stealing your ideas. If your ideas are any good, you'll have to ram them down people's throats.

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