
Do you have a question about the Alpine R-A90S and is the answer not in the manual?
Instructions for safe operation, driving attention, and volume levels to ensure safety.
Critical warnings regarding electrical connections, wiring, and installation to prevent hazards.
Steps for attaching mounting brackets and securing the amplifier to the vehicle.
Detailed instructions for connecting power supply, ground, and remote turn-on leads, including wire gauge and fuse.
Guidance on connecting RCA inputs and speaker outputs, including bridged connections and polarity.
Setting input gain and crossover modes (OFF, HP, HP-H) for channels 1/2 and 3/4.
Configuring channel input selection and crossover modes (OFF, HP, BP, LP) for channels 3/4 and 5/6.
Guidelines for selecting wire size and fuse capacity when installing a single amplifier.
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