3 input sensitivity adjustment, 4 additional load protection, 5 required ac mains – Crown POWER BASE 3 User Manual
Page 10: When set to 26 db gain, the power base-1, Requires a 2.0 volt input, the power base-2, Requires a 2.5 volt in- put and the power base-3, Power base series power amplifiers page 10, Fig. 2.4 input sensitivity switch, Fig. 2.5 loudspeaker fuse nomograph
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