Just wondering what path you guys take to get to a speaker design idea that you deem worthy to build?

For example... for me, it usually starts with a doodle. Sometimes I have a particular driver in mind when I start sketching, but it's almost always a sketch on paper with pencil that gets the whole ball rolling.
On almost all of my speaker and sub builds, I started with a quick sketch... which I tweak and recreate from different angles changing a few angles/shapes here or there until it starts to look promising. Usually one or more of those mini-sketches has an angle -- or in my case -- a curve that looks especially promising to me. I then continue with the sketches trying to bring out the beauty in that particular shape... getting proportions dialed-in, altering curves to attenuate one part or another, and generally refining the shape. Usually, a few brief 5-10 minute sessions (with breaks in between from a few hours to a few days) is all I need to get the look mostly there.

Here is a 'sketch page' that shows how a few doodles ended up turning into a shape that eventually became the Cello's speakers I entered in the 2012 MWAF. That one circled drawing in the bottom right really jumped out at me as having a nice curve and look to it. It's fun looking back at this to see what ideas did, and didn't make it into the final design.

Click image for larger version  Name:	Cellos Drawings.JPG Views:	1 Size:	126.0 KB ID:	1386822

Then I often start plugging dimensions into BassBox Pro to get a sense of the inner cabinet dimensions in liters of volume to see what size and scale I'm looking at for a cabinet height.
Then I usually make a full-size mock-up of the shape and see how it looks in the flesh. For really complicated cabinets, I sometimes make a small version to see if it's even feasible to construct the thing.

Click image for larger version  Name:	Drawing of Summer Winds (Medium).JPG Views:	1 Size:	111.5 KB ID:	1386821

For my last build, the Summer Winds... I made full size front- and side-views to scale, and then measured right from the drawings to make my panels... that made construction really easy. I drew notes on those drawings of various sizes of braces, distances, angles, thicknesses of wood, etc. Basically all the information I would need to build a set of those cabinets would be on those two drawings. I use brown floor underlayment rolls from Home Depot for that. It's cheap and comes in pretty big rolls; looks like a paper bag for the most part, but lighter.

Once I got basic volumes figured out with rough sizes, I took this paper to work for a few months and drew up some dimensions and figured out how to assemble/cut/trim pieces on my lunch break... it was a really fun diversion from work at times, I can tell you.

I was curious as to how others' got their speakers from 'idea-stage' to 'ready-for-construction' and thought it might be something worth reading for some of the newer speaker builder/designers as well.