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Beyma SB18 driver
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Powersoft View Drop Down
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Joined: 18 December 2005
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Points: 19 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Powersoft Quote  Post ReplyReply Direct Link To This Post Topic: Beyma SB18 driver
    Posted: 08 May 2009 at 12:32pm
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 . 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.

Edited by Powersoft - 08 May 2009 at 12:33pm
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nomis View Drop Down
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Points: 538 		Post Options Post Options   Thanks (0) Thanks(0)   Quote nomis Quote  Post ReplyReply Direct Link To This Post Posted: 09 May 2009 at 8:55am
hi,is it hard to get beyma in slovenia?
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Points: 46 		Post Options Post Options   Thanks (0) Thanks(0)   Quote lukam Quote  Post ReplyReply Direct Link To This Post Posted: 09 May 2009 at 9:37am
Hi,
it costs around 100 euros more and that's too much. 
And RCF and B&C are cheap here.Wink
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Points: 70 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kiriiz Quote  Post ReplyReply Direct Link To This Post Posted: 09 May 2009 at 11:34am
Can you post some photos? I always been interested how it looks Big smile
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Powersoft View Drop Down
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Points: 19 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Powersoft Quote  Post ReplyReply Direct Link To This Post Posted: 10 May 2009 at 12:09am
A few pics..










Edited by Powersoft - 10 May 2009 at 12:11am
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Points: 4408 		Post Options Post Options   Thanks (0) Thanks(0)   Quote nickyburnell Quote  Post ReplyReply Direct Link To This Post Posted: 10 May 2009 at 5:58pm
Up the other way? If so, somebody sat on a T18. Bet that does good kick, so simple as well.
 NiceThumbs Up
It's everything, not everythink!
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what are the missing measurements that are not in the pdf?
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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.Wink
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Points: 539 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Crashpc Quote  Post ReplyReply Direct Link To This Post Posted: 13 June 2009 at 11:35am
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


Edited by Crashpc - 13 June 2009 at 3:40pm
Nikon and Canon people should not be married to each other. Why did you let this happen?
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Originally posted by Crashpc Crashpc wrote:

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


What kind of modification are you talking about? Do you have any frequency response measurements?
greez
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Young Croc
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Originally posted by Powersoft Powersoft wrote:

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 . 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.


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?
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Crashpc View Drop Down
Young Croc
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Joined: 26 February 2008
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Points: 539 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Crashpc Quote  Post ReplyReply Direct Link To This Post Posted: 30 June 2009 at 10:59pm
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?
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