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    Try it in a simple 2 way design like an L20t3 or...

    Try it in a simple 2 way design like an L20t3 or 4406 and decide for yourself.

    http://www.audioheritage.org/vbulletin/showthread.php?3555-Bypassed-and-Biased-Capacitors


    Rob:)
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    What you may not realize is that system came out...

    What you may not realize is that system came out 3 years before the first CD player in 1982. So 1979 40 years ago. There is a big difference between the low end on a typical Vinyl record which was...
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    JMHO but what I'm seeing in some of these videos...

    JMHO but what I'm seeing in some of these videos is blatant abuse. You should never run drivers that hard especially vintage ones where parts are scarce or unobtanium. Get a sub if you want to run...
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    H's Rob:)

    H's

    Rob:)
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    ~ 10 grams of mass added via aquaplas on the rear...

    ~ 10 grams of mass added via aquaplas on the rear of the cone reducing Fs to ~ 28 Hz along with a modified edge treatment on the cloth surround. Well controlled and very consistent with very good...
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    The difference between a 2216Nd and a -1 is...

    The difference between a 2216Nd and a -1 is aquaplas added to the -1 so a 2216 is a 2234 vs a -1 2235 as an example.

    Rob:)
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    Yes they do. Are you using for HT or Music? For...

    Yes they do. Are you using for HT or Music? For HT they can run into trouble on some material. Mass rings slap the pole piece.

    Rob:)
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    Why don't you report the activity to the FBI?...

    Why don't you report the activity to the FBI? Might help them judge the scope of activity on the net. At least tell John and Ann. Especially if it is happening elsewhere. Also the Host not the Forum...
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    I might have to eat a little crow there. I just...

    I might have to eat a little crow there. I just took a look at them compared to Le-14A's. It very well could be aquaplas but the application looks different. Where the 14's are smooth and uniform the...
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    Both of the 128h-1 I have don't have aquaplas on...

    Both of the 128h-1 I have don't have aquaplas on them. They have a very ruff coating on the back of the cone almost like papermachte

    Rob:)
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    Hello Derek From the other side of the fence...

    Hello Derek

    From the other side of the fence it takes a significant change in mass to have a appreciable difference in FS. A coat of non loaded pigment only paint won't do it. There is a 30 gram...
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    Hello Steve I would just go with locally...

    Hello Steve

    I would just go with locally sourced wire and be done with it. As far as platting on the wire I have used both silver and tin lead. Tin lead will probably be scarce with RHOS. You...
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    The 129 and 128-1 are exact acoustic replacements...

    The 129 and 128-1 are exact acoustic replacements for each other

    https://manuals.harman.com/JBL/HOM/Technical%20Sheet/L65B%20ts.pdf

    Rob:):)
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    It's a simple 1st order series 6db crossover....

    It's a simple 1st order series 6db crossover. That said I have never used them always parallel, every JBL crossover is parallel as are most others. With the Heil there would be no advantage because...
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    'I swapped out the E-145 for TAD 1602 with good...

    'I swapped out the E-145 for TAD 1602 with good results . so its tad 1602 2118 mid and the amt for the top i like what i here ,sounds promising . now i would love to get it all passive x-over any...
  16. Thread: D8r435al-1

    by Robh3606
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    Acoustically no. When I built me Arrays using...

    Acoustically no. When I built me Arrays using coated 435's I had to adjust both attenuation and shift a filter pole because of more output above 5K of so from the Be.


    Rob:)
  17. Thread: D8r435al-1

    by Robh3606
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    Yup I can confirm all but the 2430. Rob:)

    Yup I can confirm all but the 2430.

    Rob:)
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    I would use the same box volume as the 4315 and...

    I would use the same box volume as the 4315 and just build a removable top baffle like the 4343 and keep looking for drivers. That way if you find them you can just change the baffle for the new...
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    Get a pair of Heil drivers and try a 2 way. I use...

    Get a pair of Heil drivers and try a 2 way. I use Heils with 121A's subwoofer variant of the 124's. Sounds good running active with a simple notch filter. Or you might be able to use 2118h's for the...
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    Hello Martin Yes 2235/2122 2035/2122/2123 The...

    Hello Martin

    Yes 2235/2122 2035/2122/2123 The E-145 is my favorite.

    Rob:)
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    Hello Speakerdave Don wanted an MTM design...

    Hello Speakerdave



    Don wanted an MTM design for Project May.



    They moved away for the 10 going all the way back to the original Everest. But I believe that had more to do with matching...
  22. Hello Earl That would be John Nebel and...

    Hello Earl

    That would be John Nebel and especially Ann Cantelow who did the work of getting them back. I can't thank her enough for making some of our key members part of the forum again.

    Rob:)
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    Very Nice! Rob:)

    Very Nice!

    Rob:)
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    Hello Mortron I have used both the hard to...

    Hello Mortron

    I have used both the hard to find 2122 and am currently running 2123's. They are both excellent drivers. They will not work as well under 100hz than crossing them at 300Hz in .5cuft...
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    Hello DogBox The biggest differences are...

    Hello DogBox

    The biggest differences are either the diaphragm material changes of aluminium vs. Ti.

    If the diaphragm is coated with aguaplas and last but not least the phase plug changes.
    ...
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