FE206eN and Alpha 15 in OB?

aquapiranha · 18th April 2009, 10:54 PM

does anyone have experience of these drivers together in an OB? or even if it is feasable?

If OK, what freq. would you be crossing over at? 200hz?

I already have plans for the 103E and Alpha OB I was planning on building, but just wanted to canvass opinion on the other option.

Many thanks!

brookbh · 18th April 2009, 10:59 PM

I would think you would need 2 Alpha 15s to make up the difference in efficiency between the 103e and the 206en. Is this going to be passive or active, any eq?

Scottmoose · 18th April 2009, 11:02 PM

Right, unless you pad the 206 down, twin Alphas will be better. Hell, twin 15in bass drivers are always worth having anyway. Too much is good.

aquapiranha · 18th April 2009, 11:07 PM

Thanks guys. Scott, the drivers would be borrowed from the Sachiko's I built. Do you have a design for twin alpha's and a 206 in mind? I could always get some more...

Steve

Scottmoose · 18th April 2009, 11:27 PM

Not particularly, just philosophising (as I do) -when it comes to bass, the more units the better IMO. Bass is where the brute-force approach works. Should do OK on Martin's basic twin bass unit baffle; 40in x 20in, twin Alpha 15s, crossed 2nd order, low pass at 200Hz, high pass 500Hz.

aquapiranha · 18th April 2009, 11:35 PM

Thanks Scott, I take it you mean Martin J King? not sure what the crossover you talk about means fully though, guess I ned to learn!

Steve

planet10 · 19th April 2009, 01:13 AM

Quote:

Originally posted by brookbh
I would think you would need 2 Alpha 15s to make up the difference in efficiency between the 103e and the 206en. Is this going to be passive or active, any eq?

If you want to XO passively and use little or no padding on the 206 you will need 4 woofers. It should kickass.

dave

brookbh · 19th April 2009, 04:22 AM

So what does the actual 1w/1m efficiency of the Alpha 15 drop down to on a flat baffle, around 90db? or even lower

aquapiranha · 19th April 2009, 06:42 AM

Quote:

Originally posted by planet10

If you want to XO passively and use little or no padding on the 206 you will need 4 woofers. It should kickass.

dave

Dave, are you saying I would only need a filter on the bass side rather than the 206? that sounds like as you say is would rock. How would I do this for 2 bass drivers? I have a schematic for a filter for one, but not two?

So many questions I know, I really appreciate the help!

Steve

planet10 · 19th April 2009, 06:56 AM

Quote:

Originally posted by aquapiranha
Dave, are you saying I would only need a filter on the bass side rather than the 206?

No. Just that if you want a passivce XO, and no resistor or L-Pad on the 206 you'd need 4 15s.

dave

18th April 2009, 10:54 PM	#1
aquapiranha diyAudio Member Join Date: Jul 2007	FE206eN and Alpha 15 in OB? does anyone have experience of these drivers together in an OB? or even if it is feasable? If OK, what freq. would you be crossing over at? 200hz? I already have plans for the 103E and Alpha OB I was planning on building, but just wanted to canvass opinion on the other option. Many thanks!

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18th April 2009, 10:59 PM	#2
brookbh diyAudio Member Join Date: Jan 2008	I would think you would need 2 Alpha 15s to make up the difference in efficiency between the 103e and the 206en. Is this going to be passive or active, any eq?

18th April 2009, 11:02 PM	#3
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	Right, unless you pad the 206 down, twin Alphas will be better. Hell, twin 15in bass drivers are always worth having anyway. Too much is good.

18th April 2009, 11:07 PM	#4
aquapiranha diyAudio Member Join Date: Jul 2007	Thanks guys. Scott, the drivers would be borrowed from the Sachiko's I built. Do you have a design for twin alpha's and a 206 in mind? I could always get some more... Steve

18th April 2009, 11:27 PM	#5
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	Not particularly, just philosophising (as I do) -when it comes to bass, the more units the better IMO. Bass is where the brute-force approach works. Should do OK on Martin's basic twin bass unit baffle; 40in x 20in, twin Alpha 15s, crossed 2nd order, low pass at 200Hz, high pass 500Hz.

18th April 2009, 11:35 PM	#6
aquapiranha diyAudio Member Join Date: Jul 2007	Thanks Scott, I take it you mean Martin J King? not sure what the crossover you talk about means fully though, guess I ned to learn! Steve

19th April 2009, 04:22 AM	#8
brookbh diyAudio Member Join Date: Jan 2008	So what does the actual 1w/1m efficiency of the Alpha 15 drop down to on a flat baffle, around 90db? or even lower

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