Page 1 of 4 1234 LastLast
Results 1 to 15 of 51

Thread: Titanium Dome Tweeters Sound Like Crap

  1. #1
    Senior Member millionrainbows's Avatar
    Join Date
    Jun 2012
    Location
    USA
    Posts
    15,011
    Post Thanks / Like
    Blog Entries
    137

    Default Titanium Dome Tweeters Sound Like Crap

    I have a set of old JBL studio monitors, and they have titanium dome tweeters. The tweeters ruin everything. They sound brittle, metallic, too bright, harsh, etc.
    I'm going to replace them, and will report back on the difference.





    "The way out is through the door. Why is it that no one will use this method?"
    -Confucious

    "In Spring! In the creation of art it must be as it is in Spring!" -Arnold Schoenberg

    "We only become what we are by the radical and deep-seated refusal of that which others have made us." -Jean-Paul Sartre

    "I don't mind dying, as long as I can still breathe." ---Me

  2. #2
    Senior Member jegreenwood's Avatar
    Join Date
    Dec 2015
    Location
    NYC
    Posts
    2,362
    Post Thanks / Like

    Default

    Not in my PSB Synchrony Twos.

  3. Likes EddieRUKiddingVarese liked this post
  4. #3
    Senior Member Baron Scarpia's Avatar
    Join Date
    Jun 2018
    Location
    Texas, USA
    Posts
    1,705
    Post Thanks / Like

    Default

    Maybe the tweeters are not good. Substituting a tweeter with different sensitivity and/or frequency response can make matters worse. Simply disconnecting them might result in more satisfactory sound.

    What are the odds that the mid-range drivers are actually creating the unpleasant sound?

  5. #4
    Senior Member
    Join Date
    Nov 2011
    Location
    Hollywood U.S.A.
    Posts
    5,883
    Post Thanks / Like
    Blog Entries
    1

    Default

    Sounds like a response imbalance. I have the JBL 2402 bullet tweeters myself and they are great. Could your tweeters be blown?

  6. #5
    Member
    Join Date
    Jun 2018
    Posts
    63
    Post Thanks / Like

    Default

    Sounds like a cross-over problem to me. A bit of redesign might be in order. But then again if you change out to tweeters, you will have to design the new cross-over from scratch.

  7. #6
    Senior Member
    Join Date
    Nov 2011
    Location
    Hollywood U.S.A.
    Posts
    5,883
    Post Thanks / Like
    Blog Entries
    1

    Default

    If he replaces it with another similar model of JBL tweeter, would it be able to use the same crossover?
    Last edited by bigshot; Jun-29-2019 at 07:10.

  8. #7
    Senior Member millionrainbows's Avatar
    Join Date
    Jun 2012
    Location
    USA
    Posts
    15,011
    Post Thanks / Like
    Blog Entries
    137

    Default

    It's the titanium dome tweeters, definitely. The crossover has a knob so you can dial them all the way out.

    I remember an article which said you could mask off the area and spray Krylon plastic spray on them to tone it down. I haven't tried that. (this article is evidence that I was not the only one)

    But I'm going to replace them with these:

    Audax TW025A0 1" Dome Tweeter



    Last edited by millionrainbows; Jun-29-2019 at 13:37.
    "The way out is through the door. Why is it that no one will use this method?"
    -Confucious

    "In Spring! In the creation of art it must be as it is in Spring!" -Arnold Schoenberg

    "We only become what we are by the radical and deep-seated refusal of that which others have made us." -Jean-Paul Sartre

    "I don't mind dying, as long as I can still breathe." ---Me

  9. Likes EddieRUKiddingVarese liked this post
  10. #8
    Senior Member millionrainbows's Avatar
    Join Date
    Jun 2012
    Location
    USA
    Posts
    15,011
    Post Thanks / Like
    Blog Entries
    137

    Default

    Quote Originally Posted by bigshot View Post
    Sounds like a response imbalance. I have the JBL 2402 bullet tweeters myself and they are great. Could your tweeters be blown?
    I think it's the difference in what we want to hear.
    "The way out is through the door. Why is it that no one will use this method?"
    -Confucious

    "In Spring! In the creation of art it must be as it is in Spring!" -Arnold Schoenberg

    "We only become what we are by the radical and deep-seated refusal of that which others have made us." -Jean-Paul Sartre

    "I don't mind dying, as long as I can still breathe." ---Me

  11. #9
    Senior Member philoctetes's Avatar
    Join Date
    Jun 2017
    Posts
    1,429
    Post Thanks / Like

    Default

    "the crossover has a knob" maybe a pot problem?

  12. #10
    Senior Member
    Join Date
    Nov 2011
    Location
    Hollywood U.S.A.
    Posts
    5,883
    Post Thanks / Like
    Blog Entries
    1

    Default

    The knob is just an attenuator. It isn't related to the crossover.

    If you plan to totally replace the tweeter, I would look into having a speaker tech check out the crossover too. Different tweeters have different characteristics. You wouldn't want to inadvertently create a firebreak in your response curve.

    If the tweeters aren't blown, I'd try to fix it with EQ. If you are using these in a room with large glass windows and a tile floor, that might be the problem, not the speakers themselves.
    Last edited by bigshot; Jun-29-2019 at 19:11.

  13. #11
    Senior Member millionrainbows's Avatar
    Join Date
    Jun 2012
    Location
    USA
    Posts
    15,011
    Post Thanks / Like
    Blog Entries
    137

    Default

    Quote Originally Posted by bigshot View Post
    The knob is just an attenuator. It isn't related to the crossover.
    The reason I mentioned the knob is because it's a volume control (attenuator) for the tweeter: the tweeters can be turned down completely, so I know it's them that I don't like.

    If you plan to totally replace the tweeter, I would look into having a speaker tech check out the crossover too. Different tweeters have different characteristics. You wouldn't want to inadvertently create a firebreak in your response curve.
    If you'll look up that tweeter, it has a different response; less highs. If it sound like it has a big gap, I'll do that.

    If the tweeters aren't blown, I'd try to fix it with EQ.
    I've tried all that already. These titanium dome tweeters have a "ring" or resonance that is extremely unpleasant. That's why people were spraying them with Krylon. I might still try that before I take them out, then if the new ones aren't as good, I can always switch back.

    If you are using these in a room with large glass windows and a tile floor, that might be the problem, not the speakers themselves.
    No, my room is heavily carpeted with big furniture. I have to use 2 subs to get the bass I want.

    The overall thrust of your advice seems to be "don't mess with a JBL design," but if it sounds like crap to begin with, I have no reverence for their tit-dome tweeters. The 12" speakers are killer.
    "The way out is through the door. Why is it that no one will use this method?"
    -Confucious

    "In Spring! In the creation of art it must be as it is in Spring!" -Arnold Schoenberg

    "We only become what we are by the radical and deep-seated refusal of that which others have made us." -Jean-Paul Sartre

    "I don't mind dying, as long as I can still breathe." ---Me

  14. #12
    Senior Member
    Join Date
    Nov 2011
    Location
    Hollywood U.S.A.
    Posts
    5,883
    Post Thanks / Like
    Blog Entries
    1

    Default

    Feel free to mod it, but make sure you are figuring out *why* it doesn't sound good. Then you'll know *how* to fix it. Randomly swapping things isn't an effective way of getting good sound quality. It's better to ask the questions so you know your change is a solution and not just a change.

    In general, room acoustics and EQ are the most effective way of correcting response issues. It's best to start with that, but if you are already EQing your system and you've dealt with reflections, then the next thing to check would be to see if the speakers are blown or performing out of spec. A speaker tech could tell you that, and if they are, he could suggest a suitable replacement.

    One thing you might do is to determine exactly what frequency range is causing the problem. You can easily do that with an equalizer. I doubt the problem exists in the top octave. It's probably quite a bit lower based on the way you describe it.
    Last edited by bigshot; Jun-30-2019 at 02:37.

  15. #13
    Senior Member EddieRUKiddingVarese's Avatar
    Join Date
    Jan 2013
    Location
    Father of Electronic muse
    Posts
    5,419
    Post Thanks / Like
    Blog Entries
    17

    Default

    "the crossover has a knob" maybe a pot problem?
    Maybe you should try Pot
    Last edited by EddieRUKiddingVarese; Jun-30-2019 at 10:53.
    "Everyone is born with genius, but most people only keep it a few minutes"

  16. Likes Klassik, Triplets liked this post
  17. #14
    Senior Member
    Join Date
    Nov 2011
    Location
    Hollywood U.S.A.
    Posts
    5,883
    Post Thanks / Like
    Blog Entries
    1

    Default

    That would definitely take the edge off the high end.

  18. Likes EddieRUKiddingVarese liked this post
  19. #15
    Senior Member EddieRUKiddingVarese's Avatar
    Join Date
    Jan 2013
    Location
    Father of Electronic muse
    Posts
    5,419
    Post Thanks / Like
    Blog Entries
    17

    Default

    Not so good for cone material either, as explained below............


    "Everyone is born with genius, but most people only keep it a few minutes"

Page 1 of 4 1234 LastLast

Posting Permissions

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