Tantalized by the scent of more watts, potential buyers are often seduced by the over-glowing :specifications that some manufacturers give for their amplifiers. On closer investigation, for instance, a `2 x 30 watt` amplifier may only by quoting music power, with the real power at no more than 20 watts sine power per channel, and with both channels being driven simultaneously the maximum power turns out to be only 2 x 14 watts. By means of the wattmeter described in this article, it is possible to determine the real output power of an amplifier (up to 140 watts per channel into a resistive load).
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