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    Itís could be the Lpads or a build up of grit or...

    Itís could be the Lpads or a build up of grit or corrosion in the gap.

    If you Google the are YouTubes on how to dismantle a 2505/077.

    Tip. Remove the diffraction horn from the top of the...
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    Just turn it off. If your over 60 it wonít make...

    Just turn it off. If your over 60 it wonít make any difference....Lol (just kidding)

    Exactly what is the issue with your drivers?
  3. Thread: KM2

    by Ian Mackenzie
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    21,266

    For those reading this thread and saying what’s...

    For those reading this thread and saying what’s all the hubbub about mid range drivers l recommend reading the links below. Troels Gravesen is a highly respected loudspeaker designer based in Europe...
  4. Thread: KM2

    by Ian Mackenzie
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    21,266

    Hi Ivica, Nice to hear from you. As a first...

    Hi Ivica,

    Nice to hear from you.

    As a first ďdiyĒ loudspeaker project simplicity should be a priority.

    What this guy thinks and what he will end up getting together is the reality. The...
  5. Thread: KM2

    by Ian Mackenzie
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    313
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    21,266

    Quote ďThe 2216ís are very capable and have an...

    Quote ďThe 2216ís are very capable and have an extremely smooth response to nearly 2 kHz. No peak at all. * It would be a major mistake including a 10Ē in the mix. The 2216 can easily reach a 750 Hz...
  6. Thread: KM2

    by Ian Mackenzie
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    313
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    21,266

    Why havenít you posted the whole Vertec technical...

    Why havenít you posted the whole Vertec technical document? Trying to prove what is now a repetition of the same question without complete evidence is pointless, a waste of time and futile.
    You...
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    Hi Jeff, Great post. The spatial dynamic...

    Hi Jeff,

    Great post.

    The spatial dynamic performance of a loudspeaker system has its roots in a number of engineering principles.

    The research on early reflections in wave guides by Earl...
  8. Thread: KM2

    by Ian Mackenzie
    Replies
    313
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    21,266

    2261H simulation (bottom attachment) In the...

    2261H simulation (bottom attachment)
    In the attached simulation the 2261H can be used in a 14 litre vented enclosure with an F3 of around 70 hertz. The F3 in a 10 litre sealed enclosure is about 140...
  9. Thread: KM2

    by Ian Mackenzie
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    313
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    21,266

    Hi Anti, I hope you are well. There appears...

    Hi Anti,

    I hope you are well.

    There appears to be a misunderstanding of your readings of my previous posts.

    The information and guidelines l have posted are of a general nature only as...
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    Audio and Capacitors- This document explains the...

    Audio and Capacitors- This document explains the importance of particular characteristics for audio signals

    https://www.wima.de/wp-content/uploads/media/WIMA-Audio.pdf

    Reference to pulse rise...
  11. Thread: KM2

    by Ian Mackenzie
    Replies
    313
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    21,266

    I have no idea on your selection of drivers. ...

    I have no idea on your selection of drivers.

    In the event you are still considering look at the 2250
    Itís a high power mid range driver with differential drive.

    I am not sure if itís on the...
  12. Thread: KM2

    by Ian Mackenzie
    Replies
    313
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    21,266

    Itís the most sensible post youíve made to date....

    Itís the most sensible post youíve made to date. I can actually understand it.
  13. Thread: KM2

    by Ian Mackenzie
    Replies
    313
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    21,266

    You mentioned (l think something about crossover...

    You mentioned (l think something about crossover ranges).

    Nice drivers are the foundation but how you use them and more to the point how well they work with each other is important.

    Possible...
  14. Thread: KM2

    by Ian Mackenzie
    Replies
    313
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    21,266

    Yeah but itís misleading. All drivers are Pass...

    Yeah but itís misleading.

    All drivers are Pass band devices and there phase will shift at either side of the pass band. The only reliable way is to measure the response and do a minimum phase...
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    I donít necessarily agree with all of your post....

    I donít necessarily agree with all of your post.

    One of the key measurements of audio equipment pertaining to stereo sound reproduction is channel separation.

    Thatís been around forever.
    ...
  16. Thread: KM2

    by Ian Mackenzie
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    313
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    21,266

    The novelty of looking for expensive drivers soon...

    The novelty of looking for expensive drivers soon wears off after you spend your money.
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    The question is why to some loudspeakers and...

    The question is why to some loudspeakers and indeed systems image better than others?

    Many reviewers, audiophiles and in my own experience have found absolute symmetry to be important to the...
  18. Thread: KM2

    by Ian Mackenzie
    Replies
    313
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    21,266

    This is not your thinking yet but a dual...

    This is not your thinking yet but a dual concentric driver would solve some of your searching for drivers.


    Most people when they think of dual concentric think of a Tannoy or an Altec 604. But...
  19. Thread: KM2

    by Ian Mackenzie
    Replies
    313
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    No.

    No.
  20. Thread: KM2

    by Ian Mackenzie
    Replies
    313
    Views
    21,266

    Rob3606 being a New Yorker would plough straight...

    Rob3606 being a New Yorker would plough straight in modifying the cabinets without much thought to the next step... Lol. You know the first time we discussed a project he argued like it was the end...
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    No no it’s simpler than that. The poster is...

    No no it’s simpler than that.

    The poster is located in the UK. They see the world differently as often is the case with different continents. But the thing about that lot is that when a bright...
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    Hi Jeff, I found your post interesting but...

    Hi Jeff,

    I found your post interesting but misses the point.

    No one has mentioned anything about design variations. That’s not the issue.

    You refer to questioning of the design. Frankly...
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    There are but there is a bit to get your head...

    There are but there is a bit to get your head around.

    Let me work it through and l will keep you informed.

    Ian
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    I have read your post. Sometimes itís about...

    I have read your post. Sometimes itís about picking your battles.

    Firstly, letís look at you and your motives for posting?

    Taking a big picture view Greg Timberís or JBL donít have to prove...
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    If you disconnect the Lpad from the driver and...

    If you disconnect the Lpad from the driver and the network you can measure the dcr of the series and parallel resistance of the preferred Lpad setting.

    Buy some 5 watt power resisters that are...
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