Wharfedale d618

Hey guys,

Some friends and I bought some old gear off a sound man we know, lots of it doesn't work but we're up for the project. One of the things in the collection is an old wharfedale d618 (i think its the the driver from the EVP-X18B)

We want to build a box for it so we can do small house parties etc. (we'll get the c18-650el drivers out for bigger events :):):):))

The obvious choice would be a reflex box but I can't find the ts parameters anywhere.

If anyone has them or an existing design for this sub that'd be amazing.
Otherwise a link to a good guide on how to measure the ts parameters would be amazing :).

Thanks for your time.