Re: 12v Eco project sound system
I'd just like to make it clear, I'm not telling Daniel that BF stuff wouldn't work. It might be fine - it really depends on his expectations. My point was to not expect high-end results despite what may be claimed.
If it were me doing this, and I wanted lots of output on little power for low budget, I'd consider a couple of routes:
Option A - use some of the newer Class-D based self powered speakers. In powered speakers, the designers have typically already optimized the design for efficiency and performance, sometimes to a degree greater than what you could easily achieve with your own combination of external amplifiers and cabs. At the low end of the market, cheap examples include the new Peavey Impulse series cabs, which have ribbon based HF, and actually sound pretty respectable. Whether or not they'd be loud enough for your use is TBD, you haven't clarified that yet. Pair some powered tops with some horn loaded subs.
Option B - use some older horn loaded professional speakers, such as Turbo Floodlight or similar designs. These are big and heavy, but get very loud and they sell dirt cheap these days.
Of course this is all totally dependent on how much output you need, and at what distance. I suspect a little powered box like the impulse is less than you are looking for, but we're just guessing until you fill us in. Likewise a box like the Flood might be overkill, who knows right now.
Also, considering the very low frequencies in the music you seek to reproduce, I'll again mention the Waves Maxxbass processor. You'll work very hard to get good low sub extension, Maxxbass is a pretty effective cheat to help accomplish this. The 102 model is very inexpensive.
