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Старый 14.04.2011, 21:05   #24
Serge44
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Using a Balanced Source, such as Phono Source or a Computer

Vinyl Sources

Sure, digital has gotten very good (and we’ll get to that in a minute) but vinyl is organic and liquid-sounding, and just happens to be a very cost efficient way to get a balanced source -- not to mention it provides hours of platter picking pleasure at indie record stores, too. The coil in a phono-cartridge is naturally balanced, and if you run it to a balanced phono amplifier, voila, you’ve got a truly balanced source. (Tape heads make great naturally balanced sources, too---but if you thought vinyl was obscure try finding source material on 15-inch reels!)



Digital Sources

The proper way to get as close to perfectly balanced digital source as possible is to create the inverted channel by flipping while it’s still in the numbers stage. Normally, DACs (Digital to Analog Converters) run with 0000… giving a low voltage to 1111… giving it’s maximum voltage. In this case the output with digital audio is non-inverted (or improperly but commonly called, “in-phase”). But with a simple toggle of a pin, the DAC inverts its word sequence and runs from 0000… giving the maximum output to 1111… giving it lowest voltage, which inverts the audio signal---pretty much perfectly.

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gorion (18.04.2011)