How would you get into the biz?

The future is likely single ended flea watt tube amps, efficient speakers, and vinyl. Go future!

From your mouth to Gods ear !

Sounds like seanheis1 and whyowhy liked what I was looking to do...Ok, for those that don't get it,  read my 1st post.   We had  15, 10 and a 6 1/2 in versions.

I think we've reached a time when speaker boxes should consist of tapered tubes that are the theoretical ideal for absorbing the back wave.  B&W and Vivid have made very expensive speakers with this feature but I think it's high time more companies that aspire to make high-performing speakers get on board.  If I was considering starting a speaker company I'd definitely be looking for ways to create the ideal shaped box for a reasonable price. 

I doubt that there's any massive improvement coming in drivers since so many kinds of materials and techniques have been tried and refined already.  DSP is pretty refined at this point as well and I think a no brainer for any new speaker company.  Speakers should be active, crossover should be DSP, box should be tapered tube, drivers should be a bigger part of the overall cost of the speaker than they typically are.

I'm just a hobbyist but that's my fairly valueless opinion. 

Based on my experience of building an own company from scratch, the most important thing is to do it. 
No endless discussions and plans, but doing it. 
If the product is relevant for consumers the rest will come step by step. 
Many questions can be ansered when situations must be solved. No sense in too much planning in the beginning - this is wasting precious time of building the company. 
So just do it, start now and keep us updated on your progress. 
Good luck!