Re: DIY Portable PA question


"tho x. bui" <blahx3@xxxxxxxxxxxxx> wrote in message
news:9Lyni.12820$xK1.6042@xxxxxxxxxxxxxxx
ptooner wrote:
"tho x. bui" <blahx3@xxxxxxxxxxxxx> wrote in message
news:gYgni.26$5G1.3@xxxxxxxxxxxxxxx

If the OP is using a good size deep cycle battery, he can draw 12 volts
and 10 amps for about an hour. Not an anemic.
Let's see now, 12 volts times 10 amps = 120 watts INPUT. Remember that
output must always be less than input so the absolute maximum peak power
it could put out would be 120watts. That's not what I consider
outlandish. YMMV

As you say, YMMV. Many of us play with less; definitely depends on
what/where you play. Bringing a battery powered amp to an outdoor
metalfest in front of thousands is kind of dumb; but for a small coffee
house trying to keep up with a banjo or sumthin', you can be well heard.

Oh, don't get me wrong - I agree. I was just commenting on the "outlandish
power" statement in the earlier post. I think my BA115 is rated at 100
watts, isn't it? I suspect that's rms continuous, though. I'd love to have
a battery portable too, if it was useable. I'm considering one of those
little Roland cubes.



I just finished putting together a NiMH battery pack for my homebuilt
electric bicycle. It will happily put out 10 amps at 48 volts for a good
part of the hour. It weighs about 16 lbs. Luggable.

Now that sounds a lot more interesting. I see where someone just started
marketing a small electric motorcycle but the prices was ridiculous
($15k??) and the range was less than 50 miles with a top speed of less
than 50mph if I recall correctly.

This is the old Mark I testbed, I've already moved to Mark II:

http://home.earthlink.net/~thoxbui2/shopblog/slides/cruizerinprogress03.html

That's 40 D size NiMH batteries (10 Amp-hour).

If someone gives me half of that 15k, I will gladly build them one that
can do 50/50. Pretty easy, engineering wise. But of course, I couldn't
afford the liability stuff.

Tho

Very interesting, I'll be watching for your progress on this one.

Gerry



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Relevant Pages

  • Re: OT: Scared myself shitless today.
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