Phil, Bill,
Thank-you both for your inputs.
I think I'm going review and cross reference some 12" speaker datasheets to see if I can identify one close to V30 specs.
I guess I wouldn't know whether it is the V30 in particular I liked the sound of 'most' (compared to other guitar speakers), as I haven't played a great deal of bass through guitar speakers... I have though, played through a fair amount of bass cabs, and ultimately, a wide range of specific bass speakers. The majority though, have all been ported...
I like the idea of a sealed cabinet with a pair of 12" drivers. One of the better cabs I played my V4 through (to my ears), was a Matamp 4x8 (sealed, with the dodgy, but fair quality chinese neodymium speakers Jeff managed to come by...).
I really appreciate the help gents, thanks again; I'll definitely be posting here again with equally silly questions