Speaker cab materials

Slightly off the wall, but bear with me...

Whatever subs I end up with, there will come a time when the large 3-way
boxes I'm using at present will no longer contain bass drivers and will be
replaced. The replacement cabs will likely use the existing KEF B110 and T27
drivers.

I'd like the small cabs to be as free of possible resonances and similar
effects as is feasible. To this end, those Nautilus snail shell thingies
have interesting enclosures for the mid-range drivers - very non-box-shaped,
and there's no baffle board.

Assuming I'm able to fabricate an enclosure of this type, would the general
principle of a cylindrical cab with a rounded interior shape and no baffle
work well with my drivers? If so, what materials might be suitable? I
envisage a volume of around 8 litres, rough outer dimensions being 150mm
diameter and 300mm or so long. So far, I've considered the following
construction approaches...

Cut a series of rings out of MDF, glue them together to create a tapered
cylinder, then work them to get a smooth surface.

Mould the cabinets out of GRP. Could there be resonances with this approach?
If thickness will reduce them, how thick would be good enough? 10-12mm?

Make them out of some sort of resinous paste, perhaps using wire
reinforcement for the main structure and metal plates for fitting points.
How about car body filler for this approach? If not, what other paste-type
materials are worth looking at?


--
Wally
www.art-gallery.myby.co.uk
Moving soon to: www.artbywally.com