I wanted to make a shortcut and not to measure the parameters. This will be the last resort.
I never thought of contacting the manufacturer because i did not believe he will relieve the data, but you're right it deserves a try.
As for copying the SVS design, I want to build a "Sonosub" tube enclosure because of space restrictions, besides I do not have the existing box dimensions (I have only the driver), I might find the box dimension and port diameter but not the port's length.
Even if the woofer looks identical to a known woofer, the parameters can still be different as many manufacturers use woofers specially made to their own specs. Making your enclosure the same size as the PB1000 is also no guarantee to succes, as SVS could be using EQ.
True on both counts, though IME from admittedly long ago now, the main difference between a stock driver and a 'modified' one was usually just the label and depending on the agreement, better matched to design spec.
Still, always best obviously to measure what one has.