Open baffle field coil project

jonjin · 4th December 2010, 12:54 PM

Hi,

Just got my hands on some field coil 8" from Germany - cheapo Sachsenwerk and easily available. I have put them in an open baffle and they do sound nice but are obviously bandwidth limited and when I did rough measurements, start rolling off at 300Hz. Therefore I'm up for suggestions on something that can fill in the lower 2 octaves. Something efficient enough and I would have thought 12" considering it needs to go that high.

I did think about the Supravox 285 but these are not so easily available in UK.

Thanks.

JJ

woody · 6th December 2010, 11:19 AM

Have you looked at the OB articles by Martin king ? I believe in one design he uses
2 of the emmince alpha 15A drivers crosed over to a lother driver crossing the 15A's
over at 200hz and the lother at 300hz. By the way just how cheap and easy to get
are those drivers?

4th December 2010, 12:54 PM	#1
jonjin diyAudio Member Join Date: Feb 2008	Open baffle field coil project Hi, Just got my hands on some field coil 8" from Germany - cheapo Sachsenwerk and easily available. I have put them in an open baffle and they do sound nice but are obviously bandwidth limited and when I did rough measurements, start rolling off at 300Hz. Therefore I'm up for suggestions on something that can fill in the lower 2 octaves. Something efficient enough and I would have thought 12" considering it needs to go that high. I did think about the Supravox 285 but these are not so easily available in UK. Thanks. JJ

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6th December 2010, 11:19 AM	#2
woody diyAudio Member Join Date: Jan 2002 Location: Tyrone Ga. U.S.A.	Have you looked at the OB articles by Martin king ? I believe in one design he uses 2 of the emmince alpha 15A drivers crosed over to a lother driver crossing the 15A's over at 200hz and the lother at 300hz. By the way just how cheap and easy to get are those drivers?

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