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The gain is changed by moving two jumpers on the PCB
0 µV RMS within the audio band
These can be low-voltage types as 3
composite power amplifier
300 Ω || 220 pF load Total Integrated Noise and Residual Mains Hum 1
Guardian-86 Connectors & Parts The gain is changed byThe Guardian 86 is a high end protection circuit designed to protect speakers against two common ways that power amplifiers can misbehave: Sharp voltage transients on power up and power down, resulting in annoying clicks and pops in the speakers. Excessive DC voltage on the output of the amplifier, for example resulting from amplifier failure or from unruly signal sources. The Guardian 86 is suitable for use both with single ended output and bridged