Comparing Subwoofer Xmax's (1 Viewer)

[James Mudler]

Quick question. If you take one 15" driver with a xmax of 16mm, and then take two 15" drivers with a xmax of 8mm. Will the output in DB be the same if optimum enclosures are made and input power being equal.? Lets say both loads will be a final 8 ohms.
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Luke, I'm your father

 

[Greg Monfort]

Yes, assuming the same alignment/driver efficiency.
GM
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Loud is beautiful, if it's clean

 

[James Mudler]

Greg,
You are the man. BTW I should have my biamp LR and Triamped center up and running this weekend. Thanks for the info/link on that topic too.
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Luke, I'm your father

 

[MattE]

Actually, my understanding is that it would give you 3db more output with the dual subs. According to Richard Clark, if you add an identical sub (with identical enclosure) and the same amount of amplifier power you get 6db. You get 3 from the additional cone area (Sd) and 3 from the more efficient accoustical coupling. That's why I say 3db, but it only applies if everything else is equal (which in this case is nearly impossible.)