power supply

Isolated power supplies like this 1 SPOT Pro from Truetone helped silence the groans, whines, and ticks once common to pedalboards.

All 9V blocks are not created equal. Here's what to look for to avoid hiss, hum, and crackle.

(Originally published April 22, 2020)

At the dawn of the guitar-effects age, powering pedals was relatively simple. If an effects pedal didn't take a standard 9V battery like your AM transistor radio, it plugged into the wall like your avocado-green toaster. Forever dissatisfied, guitar players eventually grew weary of changing batteries, and plugging stuff into the wall was kind of a drag, too.

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