byacey wrote:A typical amp of around 1200w output will draw a quiescent current around 500 to 750ma @120V.
byacey wrote:You are still looking at huge amounts of current at 12 VDC if any kind of audio power is required
You'd be surprised! 2x T39 and an OT12, amplified with a Class D car amp would make quite a racket only pulling 5 amps at 12v, which is 60w...
As mentioned, this isn't really answering the OP's needs any more but moreso pushing my point that with some not-so-conventional thinking you can make decent noise without much effort.
I wouldn't suggest running out and spending $x00 on such a setup for a one-off event, but a SURE TK2050, MiniDSP and a 15AH SLA would be very handy to own if want to do events outdoors without the hassle of generators. Especially when generator noise and placement is a concern, for background audio and more social-oriented occasions than a straight out band/dj gig.
That said, there's a threshold with battery powered systems that a generator and lightweight amp ends up being a better solution, but that's when we're talking about needing 50kg+ of batteries and multiple 12V amps... but strike the balance and you can have an impressive portable setup with cheap and simple parts - high sensitivity speakers like BFM's are perfect for this!
that's my ranting done, for now
