Amplifiers (especially tube amps) contain large capacitors that can hold a lethal electrical charge even when the amp is unplugged. Never open a chassis unless you know how to safely discharge these components. Fender) works?
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Located between preamp stages or before the power amp, the tone stack consists of passive filter networks. Electrical Engineering Stack Exchange Frequency Filtering: guitar amplifier electronics basic theory pdf
: The signal at this point has the correct tone but lacks the "juice" to move a heavy speaker cone Swee Lee Blog guitar amplifier electronics basic theory pdf