Search:

Type: Posts; User: ivica; Keyword(s):

Page 1 of 20 1 2 3 4

Search: Search took 0.22 seconds.

  1. Replies
    37
    Views
    1,808

    Hi Tom, I think, looking from the hi-fi point...

    Hi Tom,

    I think, looking from the hi-fi point of view, that it would be very, very difficult to get better driver, then 2231/2235 which is L300 bass driver, reproducing almost down to 30Hz.
    ...
  2. Replies
    50
    Views
    4,925

    Hi sebackman, Very nice work, and the results....

    Hi sebackman,

    Very nice work, and the results.
    I wonder 800Hz VHF crossover is meay too low for M2 horn. I would suggest 1kHz or even 1.2kHz as can be seen from the 2451Be/Trx measurements.
    ...
  3. Replies
    50
    Views
    4,925

    Hi sebackman, Very nice drivers as can be...

    Hi sebackman,

    Very nice drivers as can be seen.
    I have not get anything like this on MY measurements, if not a kind of smoothing have not been applied.

    Regards
    Ivica
  4. Replies
    50
    Views
    4,925

    Hi sebackman, Nice work and very interesting....

    Hi sebackman,

    Nice work and very interesting.
    Talking about the VHF driver response round 1kHz +/- I have to say that I can imagine the driver+M2Horn impedance would be a bit higher and more...
  5. Replies
    4
    Views
    472

    Hi Earl K, But it would be better to be seen...

    Hi Earl K,

    But it would be better to be seen if "J" curve was reduced by about 6dB (two times) I believe then such difference would be less

    regards
    ivica
  6. Replies
    50
    Views
    4,925

    Hi sebackman, Only JBL Be diaphragm the (476)...

    Hi sebackman,

    Only JBL Be diaphragm the (476) is "missing"....
    Anxiously waiting the measurements...

    regards
    Ivica
  7. Replies
    7
    Views
    1,462

    Hi David24x7, May be I am wrong, but if You...

    Hi David24x7,

    May be I am wrong, but if You are about 120" away from the speakers at 40" listening height position, the the angle off-axis in vertical plane for 2405 would be about 5.7 deg, so...
  8. Replies
    56
    Views
    19,152

    BSS BLU80 Figure with Two ADSP-21161

    Hi,

    Just for the reference, figure made by our Forum member mica (http://www.audioheritage.org/vbulletin/member.php?17620-mica)
    of BSS BLU80 internal DSPs. Such ADSP-21161 has almost 4 times...
  9. Replies
    30
    Views
    3,180

    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...
  10. Replies
    67
    Views
    16,768

    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...
  11. Replies
    67
    Views
    16,768

    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...
  12. Replies
    30
    Views
    3,180

    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...
  13. Replies
    30
    Views
    3,180

    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
  14. Replies
    38
    Views
    4,607

    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)...
  15. Replies
    38
    Views
    4,607

    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...
  16. Thread: 2235 Surround

    by ivica
    Replies
    11
    Views
    1,780

    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
  17. Replies
    28
    Views
    15,976

    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....
  18. Replies
    10
    Views
    2,563

    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...
  19. 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...
  20. Replies
    12
    Views
    2,117

    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
  21. Replies
    103
    Views
    15,413

    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,...
  22. Replies
    5
    Views
    1,457

    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...
  23. Hi TimVG, very good results! regards ivica

    Hi TimVG,

    very good results!

    regards
    ivica
  24. Replies
    2
    Views
    1,168

    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),...
  25. Thread: 4351 pdf

    by ivica
    Replies
    5
    Views
    1,508

    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...
Results 1 to 25 of 500
Page 1 of 20 1 2 3 4