The new triaxial speaker by BC Speakers

Dunno, wrote out the math from the Margolis-Small's HP 67/97 & 41C calculator program that I often post and used the attached specs except subbed Qes for Qts' to cover a little series resistance and use this little program for conversions which 'says' ~3.475 ft^3.
That said, noticed I copied this wrong! (Ft^3 = (Vb)*~28.31685) :headbash: :cuss: s/b (Ft^3 = (Vb)/~28.31685)
 

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Pardon for necromancing this thread but didn't find any discussion about the new B&C 15" triaxial, released few weeks ago but not yet available. Thomann price 899€ (incl. Finnish VAT 25.5%) https://www.bcspeakers.com/en/products/triaxial/15/8/15HTX100
B&C 15HTX100 triaxial 1.jpg
B&C 15HTX100 triaxial 2.jpg