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Amp FAQ: What is impedance, and how does it affect a guitar amplifier? | Guitar.com | All Things Guitar
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operational amplifier - Strange opamp's output impedance in spice - Electrical Engineering Stack Exchange
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Measuring input impedance and calculating output impedance calculation calculate audio amplifier op-amp how to measure impedance voltage gain total loudspeaker speaker microphone resistance resistor bridging matching test load loudspeaker source ...
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operational amplifier - High output impedance piezo guitar pickup is better attenuated by a shunt capacitor than an inverting opamp attenuation circuit - Electrical Engineering Stack Exchange
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