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Selecting drivers for X12
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The Builder View Drop Down
Old Croc
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Joined: 03 January 2010
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Points: 3107 		Post Options Post Options   Thanks (0) Thanks(0)   Quote The Builder Quote  Post ReplyReply Direct Link To This Post Posted: 22 July 2011 at 9:15am
Originally posted by ceharden ceharden wrote:

If you're going for high efficiency 12" drivers, you need a decent 1.4" or 2" compression driver.  A 1" just won't keep up.
I have P Audio SN12mb. 100db drivers in x12.
 
BMS 4550 1"keeps up easy, eq'd a bit but thats the way they are.


Edited by The Builder - 22 July 2011 at 9:16am
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ceharden View Drop Down
The 10,000 Points Club
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Joined: 05 June 2005
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Points: 11851 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 22 July 2011 at 9:30am
The BMS drivers are a bit different design-wise.

The drivers I use are 101.5dB and with my old compression drivers (PD 1.4") and using a 500W amp on them, there have been cases where I've hit the clip limiter on the HF before the midband.  Admitedly only on things like snare hits but it gives you an idea of how much headroom you need on the HF.
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Old Croc
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Points: 3107 		Post Options Post Options   Thanks (0) Thanks(0)   Quote The Builder Quote  Post ReplyReply Direct Link To This Post Posted: 22 July 2011 at 9:41am
Interesting you quote live music.
 
Never done that.
 
OK, if I was to add another BMS to each cab (on Y ) do you think that would improve the situation?
 
Thanks in advance.
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ceharden View Drop Down
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Points: 11851 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 22 July 2011 at 9:57am
I don't have any experience of using multiple compression drivers on one horn so I don't know how the BMS drivers would respond to that.

I do almost entirely live music.  You need much more amplifier headroom than for recorded music because it's largely uncompressed.  The mid and high frequencies are where you'll notice it most.
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Crazy Dane View Drop Down
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Points: 303 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Crazy Dane Quote  Post ReplyReply Direct Link To This Post Posted: 22 July 2011 at 12:37pm

Yes you need alot of headroom when it is live!

About the drivers, i am looking at some B&C too. Dont know what i will end up with yet :)
Best regards... Frank
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