I have a friend who is an electronic musician. I'm going to build a battery-powered sound-system for him, on the cheap.
The speakers I currently have in mind are the Cyburgs Viech:
This is an 8-ohm horn speaker, 96dB/W, that's supposed to hit 120dB with ~35W. Seems interesting, especially for 100 euros.
What I'd like to try, then, is to use a simple and easy battery circuit to get around 35W from an Amp4. I don't know much about batteries, but it seems that 12V batteries are common and easily available.
Aiming at low distortion, this formula, taken from the FAQ, seems to give 32-33V as a ballpark figure for 35W out of a 41Hz amp:
0.6 * 0.45 * ((32V)^2 / 8Ohm)
Is it technically possible to use a DC-DC converter to raise 12 volts from a battery to 32-33V? Easy, even?
Is it likely, in your opinion, that a cheap and effective solution can be bought readymade? Could anyone recommend some links or literature?
(Other ideas for a cheap, reasonably portable, battery-powered PA-like system are of course welcome! I'm not exactly an electronics expert, so maybe a lower-impedance speaker would be better, maybe for use with an Amp9 or something, if the voltage conversion could be omitted.)