Power SuppliesPedal power supply DC power can be generated by batteries, an AC/DC power supply, or a rechargeable battery. Each has its own advantages and disadvantages. Using individual batteries is fine for occasional players, because they don't have to worry about the cost of replacement batteries or changes in sound as batteries get tired. Battery life varies depending on the pedal's power draw. Professional players normally replace all batteries with new ones before a show. A DC power supply is a good alternative, though the initial cost is higher. However, one must pay attention to ground loops and power line hum. Noise gates can help to reduce the noise by suppressing the signal below a certain volume threshold, but this only controls unwanted noise without actually removing it from the signal.
Using a rechargeable effects pedal battery or AC/DC power supply in conjunction with a “pedalboard suitcase” reduces setup time prior to a show.
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