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Or just get a wall wart that works on 240V. Actually, check the label on the existing one, most of the switching supplies now operate on a wide input voltage range.Originally Posted by Jim Becker
You need a 240/120v four wire circuit to accomplish this on a single connection to your "mobile" DC setup. The fourth wire provides the neutral required for the 120v need. Alternatively...two separate cords.
Beranek's Law:
It has been remarked that if one selects his own components, builds his own enclosure, and is convinced he has made a wise choice of design, then his own loudspeaker sounds better to him than does anyone else's loudspeaker. In this case, the frequency response of the loudspeaker seems to play only a minor part in forming a person's opinion.
L.L. Beranek, Acoustics (McGraw-Hill, New York, 1954), p.208.
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