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Multi-Way Conventional loudspeakers with crossovers

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Old 18th November 2012, 06:11 PM   #21
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Join Date: Jul 2005
Location: Uitgeest
Originally Posted by lousymusician View Post
Very nice! How is your enclosure stuffed? How low does the TD15LO go?

When I measure with RTA in room it reaches 40hz. Bass changes from cardioid to dipole between 100 - 200hz, so I boost 7db at 50hz. Bass still pressurizes the room although it gets more dipole at the low end.

When the weather is better (summer), I am planning outside measurements.

Idea is inspired by: Cardioid bass
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Old 20th November 2012, 12:08 AM   #22
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Join Date: Apr 2010
Location: Near Boston
Dr. Geddes, thank you for your comments with regards to horn subwoofers. I do have the space for a horn sub but multiple conventional subs are much easier to build than even one horn.

LineSource, thanks for the RichMan/PoorMan driver compliment recommendations. Between those and Jeroenkv posts I am starting to see the light with respect to the constant directivity efforts done on the SEOS project. I think that using a SEOS horn and a high quality mid-bass driver supported by a multi-subwoofer arrangement would be a very attractive combination indeed.

Off to do more reading on SEOS based builds.
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Old 20th November 2012, 05:26 PM   #23
gedlee is offline gedlee  United States
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Location: Novi, Michigan
Originally Posted by rocksteady40 View Post
Dr. Geddes, thank you for your comments with regards to horn subwoofers. I do have the space for a horn sub but multiple conventional subs are much easier to build than even one horn.
And multiple subs work better. Even Don Keele noted some decades ago that horns were a bad choice at LFs when volume and complexity of the enclosure were taken into account. Above 500-1k Hz waveguides are essential for directivity control, but below that they work poorly and are not a good choice. Below 200 Hz in a small room, multiple subs are just about the only choice.
Earl Geddes Gedlee Website
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Old 1st December 2012, 12:06 PM   #24
NiToNi is offline NiToNi  United Kingdom
Join Date: Oct 2004
Originally Posted by LineSource View Post
3 on-a-couch sweet spot ... ... illustration from pispeakers literature
Does this mean that this type of setup lends itself well to a phantom center?
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