Re: 12v Eco project sound system
you always ask poignant question robert dont you? 
- well as regards soundsystem: definably not just an "attempt to just utilize the latest in technology for efficiency" - we dont mind old or new tech
our ideas center around a fusion of old and new 'elcrofolk craft' or 'folktronic' in nature. not rejecting one for the other but in constructing are project though considering the traditional and modern approaches. ideally 'what works best' would be what we go with.
it dont need to be new, if we can harness or give new life to something that is being discarded then brilliant. if components have stories then great. for example. perhaps we find some great 'old' drivers [that are as sensitive/efficient as any modern one we were looking at] and build them a new home. each step leads to the next and the greater whole evolves.
we have 12v power
we want to turn this into sound [not just loud noise] most effectively with the knowledge and skills and at our disposal.
with care and attention to detail.
size weight wise, anything near or like these BF cab discussed is fine.
we are outdoors under a canopy in open space and they would need to be build robustly.
...any better?