Page 1 of 2 12 LastLast
Results 1 to 15 of 29

Thread: Beyma 15B100R

  1. #1
    Senior Member pos's Avatar
    Join Date
    May 2007
    Location
    Paris, France
    Posts
    2,580

    Beyma 15B100R

    I have an opportunity to buy a pair of 15B100R.
    I was looking for a pair of 2235 but could not find any at a decent price.
    I know that Guido was using this driver for his 4430 clone. As I understand it the 15B100R is closer to a 2234 than to a 2235.

    I want to use it up to 300hz, with a 2123 up to 1200hz (a single 15B100R per speaker).
    Anyone have experience with this driver? Would it perform well in such a configuration?

    thanks

  2. #2
    Senior Member Guido's Avatar
    Join Date
    Apr 2003
    Location
    Germany
    Posts
    2,506
    Quote Originally Posted by pos View Post
    As I understand it the 15B100R is closer to a 2234 than to a 2235.

    Anyone have experience with this driver? Would it perform well in such a configuration?

    thanks
    It's a nice driver, very close to the 2234. Should work well with your config.

    If you insist on going non JBL try the Usher 15HM Studio also.

  3. #3
    Senior Member
    Join Date
    Apr 2003
    Location
    GTA, Ont.
    Posts
    4,779
    Hi Guido,

    - I looked around at Beymas' website for a pdf for this 15" woofer ( no luck ) .
    - It appears it's been discontinued / what do you know about that ?
    - Do you have a pdf for this 15" .

    - I already had on file the pdf for the 12" version , ( the 12B100R ) / which appears to still be current and available.

    ( Click this pic to download the pdf for the 12" version)

    - Looking at the specs for the 12" I notice it's a very short coil ( 12 mm ) operating within the same depth of gap that JBL uses for the 2203 ( 7 mm ).
    - As a result of the short coil used in the 12B100R, "real xmax" is severely limited ( one shouldn't be fooled by an "xmax damage" figure which ignores how much cone travel is available before a 10% distortion figure is reached .)

    - ie; ( IMHO ) Beymas' answer to the 2203H doesn't have the necessary Xmax to really be called a true competitor to the JBL model they clearly copied.

    - Do you think the 15" version suffers from this same handicap ?

    <>

  4. #4
    Senior Member pos's Avatar
    Join Date
    May 2007
    Location
    Paris, France
    Posts
    2,580
    I have the pdf at home, I will se if I can send it on the forum as an attachment, or at least report its specs here.
    As I remember the Xmax is also quite small compared to a 2234, something like 3mm.

  5. #5
    Senior Member pos's Avatar
    Join Date
    May 2007
    Location
    Paris, France
    Posts
    2,580
    Quote Originally Posted by Guido View Post
    It's a nice driver, very close to the 2234. Should work well with your config.

    If you insist on going non JBL try the Usher 15HM Studio also.
    thank you.

    I don't really insist, but it is difficult to do otherwise now. 2235 are rare and expensive.
    I would like to buy a LE14H-3, but the retail price seems very expensive in france (something like 460 euros) whereas it is 200 pounds in the UK (and comming from Harman France!). Is it the same in Germany?

  6. #6
    Senior Member pos's Avatar
    Join Date
    May 2007
    Location
    Paris, France
    Posts
    2,580
    Quote Originally Posted by pos View Post
    I have the pdf at home, I will se if I can send it on the forum as an attachment, or at least report its specs here.
    As I remember the Xmax is also quite small compared to a 2234, something like 3mm.
    the pdf is not online but the HTML conversion of it is still in google's cache:
    http://209.85.135.104/search?q=cache...lnk&cd=1&gl=fr
    Attached Images Attached Images  

  7. #7
    Senior Member
    Join Date
    Apr 2003
    Location
    GTA, Ont.
    Posts
    4,779
    Quote Originally Posted by pos
    I have the pdf at home, I will se if I can send it on the forum as an attachment, or at least report its specs here.
    - That would be helpful .

    Quote Originally Posted by pos
    As I remember the Xmax is also quite small compared to a 2234, something like 3mm.
    - Xmax matters ! ( perhaps a bit more to the younger set that the more sedate crowd / like me )

    - Still, personally I wouldn't bother with a 15" woofer that has less than 5mm of real Xmax ( the Alltec 416 being an exception because of it's underhung coil ) . ( A JBL 2225H has an Xmax of 5mm and I consider it to be the minimum amount for a woofer of the "overhung coil" topology ).

    - One runs out of voice-coil travel quite quickly when a low QTS 15" is put in a big box and tuned low ( run some box/woofer alignment SIMs, to see what I mean ).

    <> <>

  8. #8
    Senior Member
    Join Date
    Apr 2003
    Location
    GTA, Ont.
    Posts
    4,779

    Shopping ; by the numbers

    Quote Originally Posted by pos
    the pdf is not online but the HTML conversion of it is still in google's cache:
    Okay , good, thanks !

    - A couple of notes on woofer design that matter a lot to me.
    - I'm in the SR business ( Sound Reinforcement ) so some of my priorities may be different than others that post here.

    (1) I look for a Bl figure from an 8 ohm 15", that is over 20 T*m
    (2) I would never break the above rule when a woofers "mms" figure is over 100 grams
    (3) I prefer a QTS figure that is below .3 ( there's a bit more leyway here depending on application / it could go to .35 )
    (4) When a woofer is being used primarily for LF extension ( air pump ), I want it to have a power handling of at least 200 watts rms .
    (5) When wanting LF extension, I want the Fs figure to be no higher than 30 hz
    (6) When looking for a 15" woofer that can "punch" out a lot of air on a full time basis / I'm looking for a mms figure that is above 125 grams. ( NOTE: The heavier the cone becomes, the stronger the woofers' motor needs to be, essentially reinforcing rules 1 to 4 )
    (7) When all of the above 6 points are met / then I want the Xmax to be at least 7mm .

    - If you don't have any computer software for SIMMing woofer/box alignments / now is the time to get some before you discover you have bought the wrong woofer for your application .

    <> <>

  9. #9
    Senior Member pos's Avatar
    Join Date
    May 2007
    Location
    Paris, France
    Posts
    2,580
    Thanks Earl, I definitely have to install such a software.

    If I can get the beyma really cheap it will at least be a start, easily upgradable to "real" 2235 one day. This is for a home use so I do not plan to test the Xmax thing any soon.

    thanks a lot to both of you for your advices

  10. #10
    Junior Member
    Join Date
    May 2007
    Location
    Eys/Netherlands
    Posts
    7

    Beyma 12B100R

    First of all I would like to say "thank you very much" to all of you giving
    me a lot of information about JBL-speakers, drivers and horns during the
    past years, because, this is my first post!
    Concerning the Beyma's I would like to tell you a short story:
    For nearly 27 years I was a proudly owner of a pair 2203H. After 15 years
    the speakers has been reconed by JBLPro/Harman Germany.
    A few years ago, a german Diy-loudspeakermagazin (Klang & Ton) has tested the Beyma and they got a very good result. At the time, it seems to me that these woofers are very close the 2203H. Of course, they have
    different TSP's (better for BR) and most of all a higher SPL.
    Via Ebay I got two single woofers from different sellers during a year -just
    for testing- competing my JBL's.
    I hate it to say: After a half year of listening and testing the Beyma's
    beat my JBL's quite clearly. The Beyma's are very good, producing a powerful and also a very clear sound with a lot of fine details
    concerning snares and drums in a 55L cabinet. And they are ideal partners to my 2245H. x-over= 70 Hz
    In the meantime my 2203H are sold to a JBL-collector in Germany.
    Greetings from Holland to all of you.
    Willi

  11. #11
    Senior Member pos's Avatar
    Join Date
    May 2007
    Location
    Paris, France
    Posts
    2,580
    Quote Originally Posted by WilliO View Post
    At the time, it seems to me that these woofers are very close the 2203H. Of course, they have
    different TSP's (better for BR) and most of all a higher SPL.
    Via Ebay I got two single woofers from different sellers during a year -just
    for testing- competing my JBL's.
    They were 12B100R ?

  12. #12
    Junior Member
    Join Date
    May 2007
    Location
    Eys/Netherlands
    Posts
    7

    Beyma

    Hi pos,
    yes, my woofers are the 12' version. In my mind, this woofers
    have a lot of both, the 2203 and 2204.
    As fas as I know, the 15B100R is out of portfolio/production.

  13. #13
    Senior Member pos's Avatar
    Join Date
    May 2007
    Location
    Paris, France
    Posts
    2,580
    I have an opportunity to by a used pair of 15", so if I can get them under 200 euros it seems to be a bargain.
    I hope it will be as good as the 12" version !
    Thanks a lot WilliO !

  14. #14
    Junior Member
    Join Date
    May 2007
    Location
    Eys/Netherlands
    Posts
    7

    Beyma

    Hi pos,
    if you can buy the Beyma's for less than 200 € do it!!!
    But check them first if possible and the seller is unknown.
    Otherwise, reconing is possible and not to expensive.
    Good luck.
    Willi

  15. #15
    Senior Member pos's Avatar
    Join Date
    May 2007
    Location
    Paris, France
    Posts
    2,580
    I bought the beymas, for 196€ including shipping.
    The woofers are in very good shape.
    One thing I found strange is that the cutout diameter and the bolt diameter are not the same as JBL 15 inch drivers. This is strange for a JBL clone because you have to adjust your speaker to install the beymas.
    I had to do it on my L200. Enlarging the cutout is easy, but I will use clamps for the mounting.

    Here are some simulations using WinISD.
    The first picture compares the 15B100R to 2235H and 2234H in a 140L box (4.95 cu ft) tuned to 34hz.
    The beyma seems closer to the 2235H that to the 2234H.
    The 2235 goes 5hz deeper than the beyma at -3db in this box. The beyma needs a 200L box (7 cu ft) to achieve the exact same response curve. In fact the 15B100R is a perfect 2235H clone if you give it a bigger box.

    The second picture compares the 12B100R to the 2203H in a 55L box (1.9 cu ft) tuned to 35hz.
    Attached Images Attached Images   

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. beyma cp850 Nd Vs jbl 2241
    By gerard in forum Miscellaneous Gear
    Replies: 3
    Last Post: 07-08-2006, 01:12 PM
  2. New Italian speaker company
    By scott fitlin in forum General Audio Discussion
    Replies: 67
    Last Post: 09-17-2004, 02:23 PM

Posting Permissions

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