4th order bandpass with PR

tade · 11th November 2005, 12:56 AM

http://www.cinenow.com/us/materiel.php3/tid,4/id,2370/

That is interesting, a fourth order subwoofer with a PR instead of a port. Is this a viable DIY design? I have never seen it before.

simon5 · 11th November 2005, 06:42 AM

Why not?

John_E_Janowitz · 14th November 2005, 01:08 PM

Yes, you can easily do this. I experimented with both 4th order and 6th order bandpass using PR's about 5 yrs ago. The only problem is that you're still limited in output by the PR itself. A properly designed port can usually more more air than a single PR the same size as the active. If you ended up with a 12" woofer and dual 15" Pr's then you'd have some advantage. Per the amount of enclosure volume though you'd end up with more output to just do a standard PR enclosure with a pair of PR's. The bandpass has the advantage of increased efficiency over a given range but gives up a lot of the extension.

John

11th November 2005, 12:56 AM	#1
tade diyAudio Member Join Date: Feb 2005 Location: Ralieigh nc	4th order bandpass with PR http://www.cinenow.com/us/materiel.php3/tid,4/id,2370/ That is interesting, a fourth order subwoofer with a PR instead of a port. Is this a viable DIY design? I have never seen it before.

11th November 2005, 06:42 AM	#2
simon5 diyAudio Member Join Date: Nov 2004 Location: Québec, Québec	Why not? __________________ DIYaudio for President !

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14th November 2005, 01:08 PM	#3
John_E_Janowitz diyAudio Member Join Date: Jun 2004 Location: Green Bay, WI	Yes, you can easily do this. I experimented with both 4th order and 6th order bandpass using PR's about 5 yrs ago. The only problem is that you're still limited in output by the PR itself. A properly designed port can usually more more air than a single PR the same size as the active. If you ended up with a 12" woofer and dual 15" Pr's then you'd have some advantage. Per the amount of enclosure volume though you'd end up with more output to just do a standard PR enclosure with a pair of PR's. The bandpass has the advantage of increased efficiency over a given range but gives up a lot of the extension. John