"a.busker" wrote in message
...
Terryc wrote:

But the only real problem with either the Compact or the AC-60, is the
issue
of having to carry around a big stupid battery and inverter, because
you're
losing power converting DC to AC, and then back again. It's just
inefficient, labor intensive, and wrong.

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token signature

For the sort of power demanded there probably isn't much alternative to a
big heavy battery (except maybe a portable generator).

Many buskers adapt car audio equipment to suit their needs, often a stereo
graphic equaliser/BTL booster is easy to modify to fit the job, although
hard core customisers who like their "1 note honking bass" use low voltage
inverters with split rails (about +50V & -50V) and in car power amplifiers
designed for this use. The obvious advantage of the setup is that the
voltage isn't being transformed up only to be transformed down again so the
conversion losses are minimised.