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Planar Speaker Asylum Welcome! Need support, you got it. Or share your ideas and experiences. |
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In Reply to: Sorry, but you are misinformed. posted by Al Sekela on October 21, 2006 at 11:55:34:
Well, this is from the MG1-C manual:"Since the MGI-c is a 5 Ohm loudspeaker, some power losses are possible when wire of too small a diameter is used for a given length. For instance, 20 feet of two-conductor #22 gauge speaker wire will yield only 75-85 watts from a 100-watt amplifier (150-170 watts from a 200-watt amplifier). This can result in as much as a 25% power loss! We recommend a minimum of #14 gauge (the smaller the number, the larger the wire) for runs up to 20 feet. #12 gauge or larger is recommended for wire length of 20 feet or longer."
It does seem that they got their calculation wrong, though.
resistance of #22 gauge copper wire, per foot: 0.016 Ohm
resistance of 20 feet of #22 two-conductor wire: 40 x 0.016 = 0.64 Ohmfraction of power lost in wire = .64/5.64 = 11.35%
With 12 gauge wire, I calculate a 1.2% loss in the wires.
And with 14 gauge wire, the loss is 1.9%.
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Follow Ups
- Re: Sorry, but you are misinformed. - kh6idf 14:32:45 10/21/06 (1)
- Thanks all - strotterjr@sbcglobal.net 20:25:58 10/21/06 (0)
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