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  1. Replies
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    Hi johnlcnm, If You measure the distance from...

    Hi johnlcnm,

    If You measure the distance from the mic and center of the bass driver You can get the length distance differences, not to mention floor surface influence. So some measurements can be...
  2. Replies
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    11,051

    Hi sebackman, Thank You for the link. It would...

    Hi sebackman,

    Thank You for the link. It would be interesting to be seen comparable measurements PT-F95 vs ST825.
    But any of them has to be used say over 1.5kHz. But such frequency can be a...
  3. Replies
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    11,051

    Hi, Some ideas can be seen here:...

    Hi,

    Some ideas can be seen here:
    http://www.audioheritage.org/vbulletin/showthread.php?34275-h9800-and-476mg&p=346443&viewfull=1#post346443

    If using up to 12kHz, may be JBL PT-H95HF , is...
  4. Replies
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    1,306

    Hi johnlcnm, I think that for such large box...

    Hi johnlcnm,

    I think that for such large box speakers measuring from about distance 3m would show more realistic results.
    Applying only 1st order network (instead of 3rd applied by JBL) for UHF...
  5. Replies
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    1,306

    Hi macaroonie, may be 2262hpl the respone can...

    Hi macaroonie,
    may be 2262hpl
    the respone can be seen at page 5. of
    https://www.jblpro.com/pub/technote/JBL_TN%201-33%20rev3.pdf

    regards
    ivica
  6. Replies
    38
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    3,137

    Hi kelossus, I think putting mic to near the...

    Hi kelossus,

    I think putting mic to near the horn a small differences in the distance, or mic angle can introduce larger error, so I would suggest You to put mic 1m apart from the horn (or lenses)...
  7. Replies
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    3,137

    Hi kelossus, I would suggest to do a...

    Hi kelossus,

    I would suggest to do a measurements at least 1m (3+ feet) from the horn mouth, may be 2m would be better. A baffle about 50cm x 50cm has to be applied too, if more realistic...
  8. Thread: 2235 Surround

    by ivica
    Replies
    11
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    1,386

    Hi Vahe.., I think transparent PVA glue would...

    Hi Vahe..,

    I think transparent PVA glue would be OK, such as:
    https://reconingspeakers.com/product/white-latex-glue-1-oz-bottle/

    regards
    ivica
  9. Replies
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    5,632

    Hi robertg, Very, very interesting solution, i...

    Hi robertg,

    Very, very interesting solution, i have not seen such yet. As You have said, You can exchange 2446&2311&2398 with 2420&2307&2308.
    Any of the combos operates from 1200Hz to 8000Hz....
  10. Replies
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    1,851

    Hi Thomee, Have You tried SELENIUM HL-14-25...

    Hi Thomee,

    Have You tried SELENIUM HL-14-25 (1"-throat horn), seems very similar to the JBL 2312, You are looking for

    https://www.jblpro.com/ProductAttachments/HL14-25_SpecSheet.pdf

    regards...
  11. Hi marco_gea, Thank You for the summary data...

    Hi marco_gea,

    Thank You for the summary data presented, though, large (2") format driver throat drivers are not so popular today, as most of them would expect to be used with large horns, and...
  12. Replies
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    1,827

    Hi Eric, I think (not sure): 1xx=Magnetic...

    Hi Eric,

    I think (not sure):

    1xx=Magnetic Circuit (return path)
    2xx=Aluminum short ring for HF impedance control (as on bass driver 'Flux stabilizing ring )
    3xx=Top Plate

    regards
    ivica
  13. Replies
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    13,230

    Hi Earl K, what kind of problem can expected...

    Hi Earl K,

    what kind of problem can expected to use Be-Trx diaphragm with 476 core.
    I can imagine that Mg diaphragm would produce higher F/R response then Be-Trx one.
    Using JBL Be diaphragm,...
  14. Replies
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    1,271

    Hi ggould, I would suggest You to look at the...

    Hi ggould,

    I would suggest You to look at the JBL STX825 solution, where 2226 have been used up to 1.3kHz. With the mentioned 2380 horn I think it can be used from about 1.1kHz, so better loading...
  15. Hi TimVG, very good results! regards ivica

    Hi TimVG,

    very good results!

    regards
    ivica
  16. Replies
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    Hi toddalin, I am aware of the impedance...

    Hi toddalin,

    I am aware of the impedance influences to the network FR response, but as CD driver impedance are very complex I wold first suggest to do some measurements with the real driver(s),...
  17. Thread: 4351 pdf

    by ivica
    Replies
    5
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    1,257

    Hi bldozier. ...

    Hi bldozier.

    https://reconingspeakers.com/product/jbl-2235-mass-ring/


    I would not suggest ALNICO magnet LF basket ( D or K )
    for building LF bass driver, as it is sensitive to...
  18. D2 & M2 with passive network

    Hi Zeljko,

    It seems to that , even passive network can be applied to Your D2&M2 combo, using RLC network with Q ( =XL/R) about 0.5 with resonant frequency fo=3.6kHz, reducing sound level about...
  19. Replies
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    6,081

    Hi grumpy, I think 2447 and 2451 as 1.5" type...

    Hi grumpy,

    I think 2447 and 2451 as 1.5" type drivers have the same bolt patterns, while 2450-1.5 (SL), 2452, 53 and D2430K (D2) have the same bolt patters, but all of them are 1.5-inch driver...
  20. Replies
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    6,081

    Hi iansr, I have no experience with H1010, but...

    Hi iansr,

    I have no experience with H1010, but for me, PTH95HF is quite good with the mentioned driver.

    regards
    ivica
  21. Replies
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    6,081

    JBL PT-H95HF-1 JBL p/n: 443495=001

    Hi inasr,

    I would think about JBL PT-H95HF with 2450-1.5 driver with 2441AL or 2445 diaphragm. I think it can be used from 800Hz

    https://www.jblpro.com/ProductAttachments/tn_v1n31.pdf


    ...
  22. Hi dubkarma, So, You would need a pair of bass...

    Hi dubkarma,

    So, You would need a pair of bass drivers (2269 or 2242 or 2245 ) and a pair of UHF drivers (2405).
    I would not expect deep and solid bass from 2216nd, but it would bevery good...
  23. Replies
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    128,407

    Hi kfz03110, Owing to the 2216nd technical...

    Hi kfz03110,

    Owing to the 2216nd technical data, such 3-inch VC driver can be used as very good mid-bass driver, but a kind of bass-helper (2269), I think, would be well-come, or a kid of...
  24. Hi Tonymontana, Passive networks have more...

    Hi Tonymontana,

    Passive networks have more complex responses then standard active types. If ONLY looking at the LC values of the LF and HF parts it seems to me that LF is round 750Hz and HF is...
  25. Replies
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    Hi EE99, As I have remembered VC of 2206 is...

    Hi EE99,

    As I have remembered VC of 2206 is made of "copper-clad aluminum wire"

    https://en.wikipedia.org/wiki/Copper-clad_aluminium_wire

    so it has to be thin copper layer over aluminum....
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