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BM D450 vs. SD 740N compression drivers
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davedrpop View Drop Down
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Points: 4 		Post Options Post Options   Thanks (0) Thanks(0)   Quote davedrpop Quote  Post ReplyReply Direct Link To This Post Topic: BM D450 vs. SD 740N compression drivers
    Posted: 03 July 2007 at 10:55pm
G'day all
I want to make a couple of XM15s - the plans for the X15 list a choice of drivers - BM D450 and SD 740N, whereas the XM15 plans list just the SD 740N.

What I'm wondering is:
The SD 740N is three times the price of the BM D450 - how much better is it?
Is the BM D450 good enough for FOH?

I'm down in Poole, Dorset - is there anyone down here who is using these drivers that I could drop in on to have a listen?

any help appreciated

Dave
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Tekasis View Drop Down
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Joined: 03 July 2006
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Points: 6492 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tekasis Quote  Post ReplyReply Direct Link To This Post Posted: 03 July 2007 at 11:53pm
Originally posted by davedrpop davedrpop wrote:

The SD 740N is three times the price of the BM D450  - how much better is it?
 
Good question - From what I've gathered reading about these, I've always seen the Neo compression drivers costing more than the ferrite ones.
I don't really know if it's for the sound or the weight issue why some prefer them.
 
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ceharden View Drop Down
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Points: 11776 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 04 July 2007 at 1:08am
The big difference is that the BMD-450 is a 1.75" diaphragm on a 1" exit whereas the SD-740N is not only neo but also a 3" diaphram on a 1.4" exit.  The 740 will go almost an octave lower than the 450 and handle more power.
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Disco Stu View Drop Down
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Points: 2487 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Disco Stu Quote  Post ReplyReply Direct Link To This Post Posted: 04 July 2007 at 1:24am
Nice dave I am in Bournemouth as is Markk James and Void/Pro Audio Parts are in Hamworthy - maybe you should pay them a visit, they may be able to give you a demo!
 
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Tekasis View Drop Down
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Joined: 03 July 2006
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Points: 6492 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tekasis Quote  Post ReplyReply Direct Link To This Post Posted: 04 July 2007 at 10:34am
Originally posted by ceharden ceharden wrote:

The big difference is that the BMD-450 is a 1.75" diaphragm on a 1" exit whereas the SD-740N is not only neo but also a 3" diaphram on a 1.4" exit.  The 740 will go almost an octave lower than the 450 and handle more power.
 
Are the SD compression drivers just Neo versions of the BM-D range ?
 
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Mircea Bartic View Drop Down
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Points: 2582 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mircea Bartic Quote  Post ReplyReply Direct Link To This Post Posted: 04 July 2007 at 11:07am
Originally posted by Tekasis Tekasis wrote:

 
Are the SD compression drivers just Neo versions of the BM-D range ?
 


absolutely no
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