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Old 1st July 2014, 02:24 PM   #1
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Default Please identify this design

It appears that this type of request is not that uncommon. The subs seen here have been offered to me and I would like to learn something about them, as they might have been custom or amateur built. The driver (18"?) mounts inside facing down. Exterior measures roughly 26"x 26"x 30". Can anyone identify the source of the design? Comments on the design?
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Old 1st July 2014, 02:53 PM   #2
6L6 is offline 6L6  United States
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With a down-facing woofer, it's very likely that there is another one in there, facing the first.

So - google 'isobaric ported subwoofer' and choose images. That should get you started in the proper direction.
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Old 1st July 2014, 02:54 PM   #3
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JBL andother PA companies used designs like this one in the 80's and up to today. It is a bass reflex cabinet, the loudspeaker is mounted on the outside of the cabinet the idea being the room becomes the tuned cabinet and it allows for more capacity in the chamber..
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