Alpine R-A90S Owners Manual - Page 12

Crossover Frequency Adjustment Knob (LP FILTER) Use this control to adjust the crossover frequency between 50 Hz to 400 Hz. Remote Bass Control Connect the Remote Bass Control Unit RUX-KNOB.2 (sold separately) to adjust the output level remotely. This is not to replace appropriate gain level setting between the amplifier and head unit. Speaker Input Level Switch Switch according to the Speaker input mode. a) When making a speaker input connection with RCA Extension Cables (sold separately), set to "LO". Adjustment range on the Bandpass Filter Crossover Frequency [BP-L] [BP-H] [BP-L] Adjustment range [BP-H] Adjustment range 50 Hz 400 Hz 6 kHz b) When making a speaker input connection with Speaker-RCA Conversion Cables (sold separately), set to "HI". About Lights up Is off whe Indica Blue Red (blinking Red 10-EN ALPINE R-A90S 68-35792Z94-A (EN/FR/ES)