Beyma SB18 driver
Printed From: Speakerplans.com
Category: Plans
Forum Name: Other plans
Forum Description: Discussion / Questions about all the other plans
URL: https://forum.speakerplans.com/forum_posts.asp?TID=26592
Printed Date: 27 March 2026 at 11:01am
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com
Topic: Beyma SB18 driver
Posted By: Powersoft
Subject: Beyma SB18 driver
Date Posted: 08 May 2009 at 12:32pm
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I have build a test cab and I must say it's playing
really good and it's loud. Here are the plans http://profesional.beyma.com/download/pdf/SB18-1.pdf - http://profesional.beyma.com/download/pdf/SB18-1.pdf . For test purposes its loaded with a RCF L18S800 (from a
friend) but it has low xmax and not so much power. Now I'm planing to buy drivers for it. I'm deciding between RCF LF18N401 and B&C 18NW100. They have very similar T/S parameters. RCF has bit higher EBP. I can get them both for the same price. What driver would be better in this dessign? Which would sound better? What do you recommend? Thanks. |
Replies:
Posted By: nomis
Date Posted: 09 May 2009 at 8:55am
| hi,is it hard to get beyma in slovenia? |
Posted By: lukam
Date Posted: 09 May 2009 at 9:37am
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Hi, it costs around 100 euros more and that's too much. And RCF and B&C are cheap here.  |
Posted By: kiriiz
Date Posted: 09 May 2009 at 11:34am
Can you post some photos? I always been interested how it looks  |
Posted By: Powersoft
Date Posted: 10 May 2009 at 12:09am
A few pics..    |
Posted By: nickyburnell
Date Posted: 10 May 2009 at 5:58pm
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Up the other way? If so, somebody sat on a T18. Bet that does good kick, so simple as well.
Nice  ------------- It's everything, not everythink! |
Posted By: Grinner
Date Posted: 11 May 2009 at 12:50pm
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what are the missing measurements that are not in the pdf? |
Posted By: lukam
Date Posted: 11 May 2009 at 1:30pm
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On the Beyma site you have the CAD files for the box it's drawn in 1:1, you can take the meashures there. |
Posted By: Crashpc
Date Posted: 13 June 2009 at 11:35am
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Hello. I built the modification of this sub (for testing purposes made of DTD) , and it sounds great.With QSC RMX 1850HD It goes nearly as deep as 150l bassreflex cab, but it has better kick. Now I have to decide which to build, because both cabs are nice and smooth. http://www.repromania.net/forum/download/file.php?id=265 http://www.repromania.net/forum/download/file.php?id=264 ------------- Nikon and Canon people should not be married to each other. Why did you let this happen? |
Posted By: Ibex
Date Posted: 30 June 2009 at 10:07pm
What kind of modification are you talking about? Do you have any frequency response measurements? greez |
Crashpc wrote:Posted By: Ibex
Date Posted: 30 June 2009 at 10:11pm
Have you already plugged in the new drivers? Which one do you use? Do you have an equipment to measure the frequency response of the cabs? |
Posted By: Crashpc
Date Posted: 30 June 2009 at 10:59pm
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I did different box. The size is 55x60x72 centimetres (WxHxL) I did better angle between speaker and the wall opposite it, so the shape of the horn is more opening. I did only impedance measurement. It was tuned at 50Hz. It really does not go as deep as bassreflex, but it is not noticable in normal music (i like deep bass), but it was noticable louder with better kick especially when you cut it at 150Hz :-) There is a bit problem with the wall against the speaker - resonating too much when you push 1000W to the speaker. So I left this construction, and I get some similar, but with no "speaker against wall" because this is not any good. ------------- Nikon and Canon people should not be married to each other. Why did you let this happen? |
Posted By: Ibex
Date Posted: 01 July 2009 at 8:09am
resonating wall opposite the driver - maybe it would have been better to build the cab with MDF or birch multiplex. I also think that your wall-resonating-problem was the reason why beyma designed the opposite wall double the thickness...
Good idea to increase the flare rate at the range from the driver position down to the mouth!
I guess the design should take benefit of your modification of a slightly higher tuning frequency attended with a bit higher effiency of the lower tapped-effect peak...
 It's a pity that you are not satisfied with this design and you will change to another!
 no speaker against wall will imply less tapped effect and less effiency...
 |
Posted By: Crashpc
Date Posted: 01 July 2009 at 9:07am
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I will build it with multiplex, but I tried many enclosures to try what do I like... The sound of beymasub is cool, but the enclosure itself isn't. You have to double the thickness of both sides opposite to the speaker, so it makes this enclosure much more heavy. I wanted smallish light cab. If I can't, Ill make bigger, with better efficiency anyway. Yes. I tried this idea not only for mechanical problems, but the tuning end efficiency, because 18" bass speaker can go deep enaugh for me anyway (if not placed in horn). I think I'll do something like this: http://swdradio.iczy.info/service/speaker/RCF_Bassbin.jpg The Stove :-) ------------- Nikon and Canon people should not be married to each other. Why did you let this happen? |
Posted By: Ibex
Date Posted: 01 July 2009 at 10:04am
as I said before: driver nearer the mouth, higher flare rate @ this position --> less tapped effect, less effiency in the lowest range (1. tapped-effect peak), works more like a ARLS (or like a short path scoop with large chamber)
have you already build a test enclosure of the rcf bass bin? how does it sound compared to the beyma sb15?
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Posted By: Crashpc
Date Posted: 01 July 2009 at 10:49am
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No I didn't. I built something different with straight mounted speaker. http://www.repromania.net/projekty-pa/sub-mt18sub-bc-18pzb46.php http://www.repromania.net/fotografie/projekty-pa/sub-mt18sub-bc-18pzb46/sub-18-mt18sub-08.jpg It sounds nice too, but too much bassy and less kicky :-) So I try RCF bassbin or something like this... It has better and longer horn part of the bin... So less tapped effect, more horn effect... ------------- Nikon and Canon people should not be married to each other. Why did you let this happen? |
Posted By: Ibex
Date Posted: 01 July 2009 at 11:06am
I would classify the Megaton MT 18 SUB as a conventional reflex loaded cab with a big and therewith long port to get a low tuning frequency. no horn or neither tapped effect.
I think the RCF bassbin would achieve your requirements of sounding more kicky, as you already said: more horn effect!
Good success and I hope you will be satisfied with the cab!
cheers
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Posted By: _djk_
Date Posted: 01 July 2009 at 11:08am
It will only be 101dB above 100hz, and it will be at least 10dB down at 33hz. It's similar to this EV cabinet, but can't work as well as it's smaller. http://archives.telex.com/archives/EV/Speakers/EDS/SH-1810L-ER%20EDS.pdf - http://archives.telex.com/archives/...0L-ER%20EDS.pdf But on the other hand, many people are satisified with the EV, so you may be satisfied with yours. Keep in mind: A 2 cu ft 2nd order sealed box with an F3 of 30hz can only be 0.18% efficient (84.55dB). A 2 cu ft 4th order vented box with an F3 of 30hz can only be 0.36% efficient (87.56dB). A 2 cu ft 6th order vented box with an F3 of 30hz can only be 0.90% efficient (91.54dB). The 'horn' on the EV/Beyma is too short to work below 100hz, and the rear volume acts as a vented box below 100hz (and it is tiny). Note: the correction factor between 2.83V/1M and 4V/10' is +6.67dB The Beyma is only 2/3 the total size of the EV, so it must be almost 2dB less efficient below 50hz. ------------- djk |
Posted By: Crashpc
Date Posted: 01 July 2009 at 11:26am
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Ibex: There wouldn't be any reason to build it like this when you do not get any added sensitivity. You can easily build a bassreflex cab with 160l volume behind the speaker, and the overall volume of the bassreflex box will be smaller. So they build it for some reason. I guess it has some bas enhancement near 100Hz. If people play some bigbeat or hardrock, I guess they cut it at 120-150Hz, so they get that few decibel peak to have a bit kicky bass, cause they do not need 30Hz, even 40Hz maybe not... djk: Well I don't care - I need some bassbin with better kick than standard bassreflex cabs, no matter if it is one decibel up or down. I tried this beymasub with QSC RMX1850HD on the firehouse party, and we did not need any bridging. We had to go down to -6db to stop CD players shaking and skipping, because antishock of the players was unable to work when it was turned all the way LOUD..... There would be different situation when we play open air, but I really don't think I need the last decibel possible. I do not need 33Hz, I need 45Hz and up... I think there is not only better or stronger bin or bad bin. There are many cabs YOU LIKE and YOU DO NOT LIKE, so against all theory, you can decide for the worse cab only because it is smaller, or lighter, or you like the sound. Do not look only at decibel counts. ------------- Nikon and Canon people should not be married to each other. Why did you let this happen? |
Posted By: Ibex
Date Posted: 01 July 2009 at 12:53pm
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Crashpc, may I refer you to that link:
http://www.speakerplans.com/Forum/forum_posts.asp?TID=28315&PID=281742&title=do-you-know-this-project-from-beyma#281742 - http://www.speakerplans.com/Forum/forum_posts.asp?TID=28315&PID=281742&title=do-you-know-this-project-from-beyma#281742
_djk_, do you know this cab?
http://www.jobst-audio.de/Entwicklungen/mbh-118/mbh-118.htm - http://www.jobst-audio.de/Entwicklungen/mbh-118/mbh-118.htm
looks bloddy similar, what do you think? can you expect the same "kicky" sound from this cab as from the Beyma SB18?
Along the way perceived, I have to agree Cashpc's argumentation, I think these cabs are not designed to go load at the low end, IMHO they are rather to extend the frequency range of an infra-sub with a kickbass response and a little bit low end... infra and hybrid designs are currently very popular, regardless if they are the most efficient solution.
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Posted By: Ibex
Date Posted: 01 July 2009 at 1:15pm
Beyma SB18 loaded with the MBH-118 driver... I think the designs are 1:1
 black = Beyma SB18 (or Jobst MBH-118) - RCF L18S800
grey = Beyma SB18 (or Jobst MBH-118) - Beyma 18P1200Nd
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Posted By: mobiele eenheid
Date Posted: 01 July 2009 at 4:52pm
An Eminence Kappa 15LF in the SB18 will beat or equal an 18" basreflex (18LW1400) of similar size from 50 Hz and up (up till the point were the bigger VC from the 18" will dominate it's effects). Compared with an Kappa 15LF in a 110 liter enclosure tuned to 42 Hz, it can be 6 dB more efficient at 120 Hz and up.
It measures and sounds like a 6th order bandpass, I prefer to cross them low (80-125 Hz low pass). Above 160-210 Hz (model dependant), they drop like a rock, never to recover.
It simulates quite well, it measures better. It's a 40 Hz and up bin. From 50 Hz and up it's quite flat.
Best regards Johan
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Posted By: Ibex
Date Posted: 01 July 2009 at 5:48pm
Hi Johan, thanks for your comment! Does that mean, that the big peak which is shown in my simulation around 160Hz will not be there in reality (of course without low pass)?  I already read something that the two peaks of a tapped horn simulation will be not as high in reality, but not that there will be no peak...  greez |
Posted By: mobiele eenheid
Date Posted: 01 July 2009 at 6:27pm
Looking at those measurements I would aspect more kick then a SB18, but less suited for stand alone use.
After it drops down at ~200 Hz I wouldn't aspect those "recovery" peaks.
Best regards Johan
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Posted By: Ibex
Date Posted: 01 July 2009 at 7:31pm
Do you mean the measurement of the Jobst MBH-118?  So you think, that it's not the same design as the Beyma SB18? Refering to my simulation of the SB18 I would also aspect more kick...? http://www.speakerplans.com/forum/forum_posts.asp?TID=26592&PID=281834&title=beyma-sb18-driver#281834 Why do you think, that it's not suited for stand alone use? Do such designs take benefit at the low end by stacking them? Do you know something about the following cab design? http://www.jobst-audio.de/Nachbauten/aw-mtl/awmtl.htm greez |
Posted By: Ibex
Date Posted: 01 July 2009 at 7:51pm
Seems that the Jobst MBH-118 has a lower tuning frequency than the Beyma SB18-1 Beyma SB18-1 - Impedance  Jobst MBH-118 - Impedance Is tat the reason why you expect less effiency at the low end/more kick from the Jobst Hybrid? |
Posted By: Ibex
Date Posted: 01 July 2009 at 8:43pm
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Wow, the AW-MTL loaded with the low budged Eminence Kappa 15LFA driver is a sly old dog! Convince yourselves!  black = Beyma SB15-1 grey = AW-MTL  black = Beyma SB18-1 grey = AW-MTL |
Posted By: Ibex
Date Posted: 01 July 2009 at 9:01pm
Another simulation in which I have changed the drivers of both designs with each other... black = AW-MTL - Beyma 15P1200Nd grey = Beyma SB15 - Eminence Kappa 15LFA |
Posted By: Ibex
Date Posted: 02 July 2009 at 7:02pm
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Someone said, that the Beyma cab is the same as the Electro Voice... Here are the simulation results:  black = Beyma SB18-1 - 18P1200Nd grey = EV T18 - EVX180B  black = Beyma SB18-1 x2 - 18P1200Nd grey = EV MTL-1X - EVX180B cheers |
Posted By: mobiele eenheid
Date Posted: 02 July 2009 at 7:38pm
They're both hybrides but likely different hybrides, thus with different performance.
As you might now these hybrides can be described and explained from different perspectives, which will have a certain overlap with each other. It can be described as a rear loaded band pass horn (RLBPH), a tapped horn with a large chamber and a short horn, a reflex cabinet (BR) with an unusual large port and even a band pass device (BP) with a roll off in both the high and low frequency response.
As all RLBPH it will have a dip in the frequency reponse derived from the half wavelength cancelation. Scoops hace long horns, which causes this cancelation usually to take place just beneath 100 Hz. Shorter horns such as these RLBPH will thus have a cancelation between 150 and 250 Hz. Having such a dip in the area that represents the "higher kick" make these enclosures less suitable for kick (at least in my view). By the way: This dip get's smaller as you stack more cabinets
As you can see at the measurement of the MBH-118 this dip is above 200 Hz, whilst mine prototypes similar to the SB18 showed this dip to start around 160 Hz. Because the MBH-118 extends higher I would think it to be more suited for reproducing the "kick".
Because the MBH-118 shows an ever falling response and the SB18 look-a-like prototype is pretty flat from 50 Hz and up I aspect the SB18 more suited for stand alone use. Also because most horn cabinets are either good kick-cabinets or good bass cabinets but usually not both (seen from the BP-perspective).
A cabinet will have constructive interference with similar cabinets as long as it's placed within 1/4-wavelength of any reproduced frequency. A BR-cabinet however doesn't show a significant improvement in it's low frequency reponse such as a RLBPH would. Being in the midst of a BR and a RLBPH, it's feasible to say the improvement in low frequency response should be better as an BR but not as good as a RLBPH.
The last cabinet you introduced is about 250 liter (IIRC) whereas the SB15 from my memory is at least 65 liters smaller. Such a difference can well be responsible for the difference showed in the simulations.
Best regards Johan
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Posted By: Ibex
Date Posted: 03 July 2009 at 7:42am
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Johan, thank you for the detailed and colorful description!!!
I think I should hand in the cab sizes later to complete the comparision:
Beyma SB15 - 43x50x73 - 157 litre
Beyma SB18 - 54x54x79 - 231 litre
Jobst MBH-118 - 58x58x74 - 249 litre
AW-MTL - 65x60x66 - 257 litre
EV T18 - 62x80x60 - 298 litre
EV MTL-1X - 116x57x75 - 496 litre
cheers
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Posted By: TDA-Audio
Date Posted: 03 July 2009 at 8:31pm
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to Ibex
please on these systems graph 1/2 EV MTL-1X - EVX180B (1x18") and EV T18 - EVX180B can be a project MBH-118 copy 1/2 EV MTL-1X ???? ------------- horns plans http://photofile.ru/users/tda-audio/ |
Posted By: Ibex
Date Posted: 03 July 2009 at 9:37pm
For sure, TDA!  black = EV MTL-1X grey = EV T18 x2  black = 1/2 EV MTL-1X grey = EV T18  black = 1/2 EV MTL-1X - L18S800 grey = 1/2 EV MTL-1X - EVX180B  Jobst MBH-118 - RCF L18S800 - SPL  1/2 EV MTL-1X - L18S800 Jobst MBH-118 - RCF L18S800 - Impedance Dimensions: Jobst MBH-118 - 58x58x74 - 249 litre 1/2 EV MTL-1X - 58x57x75 - 248 litre TDA, I think so too... suspicious congruent! It would be also very interesting to compare these designs together with some real Tapped Horn designs! What do you think? cheers |
Posted By: Ibex
Date Posted: 03 July 2009 at 10:16pm
For example: black = Beyma SB18 - Beyma 18P1200Nd - 54x54x79 - 231 litre grey = Staiper Tapped - B&C 15TBX100 - 63x80x60 - 302 litre  black = Beyma SB15 - Beyma 15P1200Nd - 43x50x73 - 157 litre grey = Staiper Tapped by TDA - B&C 12NW100 - 38x80x60 - 182 litre In both cases the low cut-off frequency is allmost the same, but the RLBPH designs have the smaller enclosure. The second peak of the real tapped horns is narow beyond 100Hz. The RLBPH have this peak @ 160Hz, this peak envelopes the upper slim ones of the tapped designs.... Bloody similar, but the tapped designs have more interferences (more slim peaks, more pronounced comb filter effect). Would be interesting how both designs sound... Did anyone compare such designs together and knows how they sound? Did anyone measure the frequency response of both designs? greez |
Posted By: jethrocker
Date Posted: 03 July 2009 at 10:47pm
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Ibex..worth noting that according to most of the tapped horns built and measured (best place to see tapped horn project results is diyaudio.com forum) to date the reports are that the actual response isn't so spiky at the upper end and is somwhat filtered, generally being more alike to the RLBPH plots you posted. Thanks for the posts, interesting comparisons :) |
Posted By: KenTech
Date Posted: 04 July 2009 at 4:09am
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can u post the Data for building SB18-1 Cab ? those angles inside... and the lenght of some boards, inside... 10x What about the comparison between ES18 BPH and Beyma SB18-1 ? Loaded with the same driver, Paudio C18-ELF. |
Posted By: Ibex
Date Posted: 05 July 2009 at 6:45pm
  black = Beyma SB18 - PAudio C-18ELF grey = ES18-BPH - PAudio C-18ELF |
Posted By: jerronimo
Date Posted: 13 August 2009 at 3:59pm
I'm looking for a good design for these woofers. Where did you get the design with the triangular ports, is it originally a RCF design?
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Posted By: Crashpc
Date Posted: 13 August 2009 at 9:52pm
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No, It is BC 18NW100. It is only inspiration. I made different cab with different dimensions, port sizes, tuning.... You can see here: http://www.repromania.net/forum/viewtopic.php?f=22&t=397 ------------- Nikon and Canon people should not be married to each other. Why did you let this happen? |
Posted By: Jobsti
Date Posted: 16 September 2009 at 1:21am
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Hi, Newest Measurements of the final construct: Yesterday, I measured a EV T-18 from a customer with S801 and XB700, measurements tomorrow! Jobst-Audio |
http://s7.directupload.net/file/u/19705/8partwg2_jpg.htm"> 
Posted By: rizzardo
Date Posted: 13 October 2009 at 6:06pm
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hi, I want to realize a cuple of this sb15 beyma project. But, finally, what different woofers can work good in this project? Like RCF, B&C, 18sound, Ciare ecc ecc ecc ... Thanks!! ------------- Bass is good when they move our trousers |
Posted By: Crashpc
Date Posted: 13 October 2009 at 6:29pm
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There will work any speaker with Xmax of about 8mm or more, Qes 0.4 or less, so that mean most of 15" speakers from BC,RCF,Beyma,Selenium,Fane,Precision Devices,etc, etc... All depends on the prices in your country. I like BC and RCF. They are strong speakers for good price. ------------- Nikon and Canon people should not be married to each other. Why did you let this happen? |
Posted By: mobiele eenheid
Date Posted: 14 October 2009 at 5:46pm
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Xmax can be less then 8 mm but offcourse better more then less.
When Qts drops too much some cabinet changes might be in order to keep the response flat (say lower then 0.26) tho it might still sound fat. Also drivers with EBP of ~100 and higher are preferred. Last but not least, Mms/Mmd doesn't have to be very high.
Regards Johan
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Posted By: Crashpc
Date Posted: 14 October 2009 at 6:21pm
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I think that this box is supposed to be used with some of Beyma speakers, so you can see its parameters. I prefer to see real measured, because almost no company has the same measured and written. Especially older Beyma speakers. Lower QTS will cause less of deep bass. I'd stop talking about it like about subbas, but with good speakers start like kickbass...
------------- Nikon and Canon people should not be married to each other. Why did you let this happen? |
Posted By: mobiele eenheid
Date Posted: 16 October 2009 at 4:41pm
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Low Qts driver will have less deep bass but also make the frequency response very peaky (~4-6dB+). In order to avoid this the horn length should be increased in exchange for less volume in the chamber. PersonallyI think high passing at 40 Hz is the way to go. In this case you can use Fs ~40 Hz drivers, increasing EBP.
Regards Johan
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Posted By: Crashpc
Date Posted: 16 October 2009 at 4:48pm
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mobiele: indeed. That's true. I have diferrent angle of view for it now. I've tried this, and now I know you usually can use 30Hz HPF for better speakers. They will handle its cone excursion of about +-10mm max with full power (usually 1000W)
------------- Nikon and Canon people should not be married to each other. Why did you let this happen? |
Posted By: rizzardo
Date Posted: 20 October 2009 at 1:38pm
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Boys thanks a lot for your indications!! Now i'm searching a cheap cone with this parameters... ad simulate into hornresp. But it isn't simple... ------------- Bass is good when they move our trousers |
Posted By: rizzardo
Date Posted: 20 October 2009 at 1:58pm
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Boys thanks a lot for your indications!! Now i'm searching a cheap cone with this parameters... ad simulate into hornresp. But it isn't simple... ------------- Bass is good when they move our trousers |
Posted By: mobiele eenheid
Date Posted: 20 October 2009 at 7:21pm
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Sure it is, what's your budget? Any preferred brand between those?
Regards Johan
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Posted By: bena1
Date Posted: 20 January 2010 at 3:34pm
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Hey guys what u guys think of a 650 p.audio chalenger in this cab? ------------- Seeking the best bass! |
Posted By: fredos666
Date Posted: 21 January 2010 at 2:04pm
| I've built each, SB15 and SB18. I use the Eminence Kappalite 3015LF and the RCF 18N401 with really good result in each. But I found a better output in the SB15 with the woofer assembled in reverse, ie the magnet in the horn. RTA is more smooth and sensitivity is 0.5db more. |
Posted By: TubeTom
Date Posted: 27 May 2010 at 7:09pm
I have build 4 of the Beyma SB18 Cabs: Which is the best speaker (punchy and loud) for live in this cab? 1.) Beyma 18P1200ND 2.) Beyma 18P1000ND 3.) Beyma 18P80ND Is there an alternative speaker (similar parameters) like Faital, 18Sound, ... with best performance for this cab? |
Posted By: Crashpc
Date Posted: 27 May 2010 at 7:26pm
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Geeez nice box man! You should ask Beyma guys... I´d like to see RCF LF18N451 in it. Some strong kicky speaker. The bin is kicky anyway, so I´d maximize this feature on it. I Tried BC18NW100, and then threw this idea out. I need deeper bass. ------------- Nikon and Canon people should not be married to each other. Why did you let this happen? |
Posted By: Drapetsoniths
Date Posted: 27 May 2010 at 9:50pm
B&C 18tbx100 has almost the same t/s paramters and sims identical to the beyma one(although heavier).
Did i mention it is a lot cheaper?  (at least in Greece)
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Posted By: TDA-Audio
Date Posted: 28 May 2010 at 4:45am
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\\\\\\\\I have build 4 of the Beyma SB18 Cabs\\\\\\\\\\\\ very gooood work!!! 3.) Beyma 18P80ND - short hi VC - 20mm ------------- horns plans http://photofile.ru/users/tda-audio/ |
Posted By: Crashpc
Date Posted: 28 May 2010 at 5:55am
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Drapetsoniths: Although it is good strong speaker, I wouldn´reccommend it in this cab. 18TBX100 is Heavy machine with lower sensitivity (maybe the same as Beyma one - See splREF). ------------- Nikon and Canon people should not be married to each other. Why did you let this happen? |
Posted By: pope
Date Posted: 28 May 2010 at 3:23pm
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Posted By: pope
Date Posted: 28 May 2010 at 3:26pm
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http://www.elmuz.com.pl/sklep/index.php?k136,kolumny-glosnikowe-subbasy -
http://www.elmuz.com.pl/sklep/index.php?k136,kolumny-glosnikowe-subbasy
This site from Poland sells SB18, SB15, SB12 (photo above)
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Posted By: Drapetsoniths
Date Posted: 28 May 2010 at 4:58pm
Here is the simulated frequency response comparison between b&c 18tbx100 (grey colour) and the beyma 18p1200nd (black colour)
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Posted By: Drapetsoniths
Date Posted: 28 May 2010 at 5:06pm
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Also the max spl between them ,again b&c is grey and beyma is black.
Beyma wins because it has 9,5mm xmx instead of 9mm but the gain is tiny.If I put 9mm xmax on both drivers the max spl plots are identical(overlap perfectly).
 |
Posted By: TubeTom
Date Posted: 28 May 2010 at 6:08pm
| Yes, it's from Poland and was build in Italy! |
Posted By: subbass
Date Posted: 22 June 2010 at 11:53pm
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Hi! Has anyone got the HR input parameters for the beyma SB12? Thanks
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Posted By: Tiaguito
Date Posted: 18 February 2012 at 3:48pm
Any one has the Hornresp data for SB18? 
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Posted By: gruka
Date Posted: 16 October 2012 at 8:20pm
| May someone give us the exact measurements of this SB18 cab on this thread's photo |
Posted By: SERGEY
Date Posted: 07 November 2012 at 10:01pm
BEYMA SB18 MY VERSION SERGEY
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Posted By: SERGEY
Date Posted: 07 November 2012 at 10:03pm
Beyma SB18
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Posted By: SERGEY
Date Posted: 07 November 2012 at 10:23pm
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Posted By: SERGEY
Date Posted: 07 November 2012 at 10:24pm
sb18 odessa |